An air discharge spectrum calculation method and system considering air humidity change and OH free radical luminescence

Abstract

The present application relates to a kind of air discharge spectrum calculation method and system considering air humidity change and OH free radical luminescence, the method includes: obtaining dry air basic discharge parameter and the discharge structure parameter and environmental parameter of the discharge object to be calculated, and based on air humidity, water vapor partial pressure and dry air partial pressure are calculated;Based on the water vapor partial pressure and dry air partial pressure, collision ionization coefficient and electron attachment coefficient in air discharge are corrected using partial pressure weighting method, and based on the correction result, discharge process is solved using fluid dynamics model, and discharge result under different humidity conditions is obtained;Based on the discharge result, humidity-related electron temperature field is constructed, and the concentration of air intrinsic luminescence component and OH humidity-related luminescence component is estimated, and then the humidity-related overall discharge spectrum of air is calculated based on the concentration.Compared with prior art, the present application has the advantages of more truly reflecting the change of discharge process under different humidity conditions and the like.

Description

Technical Field

[0001] This invention relates to the field of gas discharge diagnosis and radiation characteristics, and in particular to a method and system for calculating air discharge spectra that takes into account changes in air humidity and OH radical luminescence. Background Technology

[0002] Partial discharge, streamer discharge, and corona discharge in air are widely present in high-voltage transmission lines, external insulation equipment, defect areas of gas-insulated equipment, and near sharp metal protrusions. During the discharge process, electrons gain energy under the influence of a local strong electric field and undergo processes such as collision ionization, attachment, excitation, dissociation, recombination, and radiative transitions with N2, O2, and water vapor molecules in the air, thereby generating emission spectra with characteristic information. Calculating and analyzing the discharge spectrum helps to understand the discharge development process, identify the source of luminescent particles, interpret optical measurement results, and provide a basis for spectrum-based partial discharge detection and condition diagnosis.

[0003] In existing technologies, one type of method focuses on the numerical simulation of the discharge process. This typically involves solving Poisson's equation, the electronic continuity equation, the positive ion continuity equation, the negative ion continuity equation, and photoionization source terms to obtain the spatiotemporal distributions of electric field, electron density, ion density, and electron temperature. While this type of method can describe the discharge development process, it usually cannot directly output the local emission spectrum corresponding to the discharge process, nor can it distinguish the contributions of different luminescent components to the spectrum. Another type of method focuses on spectral calculations, typically calculating spectral line intensities and band distributions based on a given temperature, particle population, or particle concentration. However, this type of method is often separate from the actual discharge process and struggles to reflect the spatiotemporal non-uniform changes in electric field, electron energy, and particle concentration during the discharge process.

[0004] Furthermore, the air discharge process is significantly affected by ambient humidity. Moist air can be considered a mixture of dry air and water vapor. Water vapor not only alters electron collisional ionization and electron attachment processes but also participates in electron collisional dissociation, free radical generation, and subsequent radiation processes. For tip defect streamer discharges in air, increased humidity may change the collisional ionization coefficient and attachment coefficient, thereby affecting the streamer propagation speed, streamer head electric field strength, electron density, light intensity, and degree of ionization. If dry air parameters or fixed discharge parameters are still used in discharge spectrum calculations, it is difficult to obtain the true evolution of discharge spectra under different humidity conditions.

[0005] Furthermore, water vapor participating in the discharge process produces luminescent components related to moisture, among which the luminescence of OH radicals is an important component of the humid air discharge spectrum. OH luminescence is generally related to water molecule dissociation, electron collision excitation, and radiative transitions from excited OH states to lower energy states. Current discharge spectrum calculation methods often only consider N2, O, O + The calculation of the intrinsic luminescent components of air is ignored, while the contribution of OH luminescence caused by humidity changes is neglected. This leads to a discrepancy between the calculated spectrum and the actual measured spectrum in high humidity air discharge or discharge in water-containing environments.

[0006] Therefore, existing technologies still lack a method for calculating air partial discharge spectra that can directly incorporate changes in air humidity into the discharge process parameters, further couple the electron temperature field and particle concentration field, and add the OH luminescent component in the post-processing stage. Based on this, it is necessary to propose a new technical solution to achieve full-time and spatiotemporal calculation of the air discharge process and its OH-related spectra under different humidity conditions. Summary of the Invention

[0007] The purpose of this invention is to provide a complete method and system for calculating air discharge spectra that takes into account changes in air humidity and the luminescence of OH free radicals, thus enabling complete simulation of humid air discharge spectra.

[0008] The objective of this invention can be achieved through the following technical solutions: A method for calculating air discharge spectra that takes into account changes in air humidity and OH radical luminescence includes the following steps: Step 1: Obtain the basic discharge parameters of dry air, as well as the discharge structure parameters and environmental parameters of the object to be discharged, and calculate the water vapor partial pressure and dry air partial pressure based on the air humidity. Step 2: Based on the partial pressure of water vapor and dry air, the collisional ionization coefficient in air discharge is corrected using a pressure-weighted method. and electronic adhesion coefficient Based on the corrected results, the discharge process was calculated using a fluid dynamics model, and the discharge results under different humidity conditions were obtained. Step 3: Based on the discharge results, construct a humidity-related electron temperature field, estimate the concentrations of the intrinsic luminescent components of air and the humidity-related luminescent components of OH, and then calculate the humidity-related overall air discharge spectrum based on the concentrations.

[0009] Furthermore, the basic dry air discharge parameters include the dry air collisional ionization coefficient. Dry air electronic adhesion coefficient Electron mobility Positive ion mobility Negative ion mobility Electron diffusion coefficient and composite coefficient , The recombination coefficient between electrons and positive ions. The recombination coefficient between negative and positive ions; The discharge structure parameters include geometric parameters and electrical parameters. The geometric parameters include electrode shape, gap distance, calculation region, and boundary conditions. The electrical parameters include applied voltage. Electrode polarity, initial electron density, or background ionization source term; The environmental parameters include gas temperature. Total air pressure absolute humidity or relative humidity .

[0010] Furthermore, the expression for calculating the partial pressure of water vapor is: When using relative humidity The formula for calculating the partial pressure of water vapor is: , In the formula, For water vapor partial pressure, The partial pressure of saturated water vapor. The gas temperature; When using absolute humidity The formula for calculating the partial pressure of water vapor is: , In the formula, The air saturation humidity; The formula for calculating the partial pressure of dry air is: , In the formula, Total air pressure This is the partial pressure of dry air.

[0011] Furthermore, the collisional ionization coefficient in the modified air discharge and electronic adhesion coefficient The steps include: Based on the water vapor partial pressure and dry air partial pressure, the proportions of water vapor partial pressure and dry air partial pressure are calculated respectively. When relative humidity is used... The formula for calculating the percentage of water vapor partial pressure is as follows: , In the formula, The percentage of water vapor partial pressure. The partial pressure of saturated water vapor. For gas temperature, Total air pressure; When using absolute humidity The formula for calculating the percentage of water vapor partial pressure is as follows: , In the formula, The air saturation humidity; The formula for calculating the percentage of dry air partial pressure is: , In the formula, This represents the percentage of dry air partial pressure. The partial pressure of dry air; Set the collisional ionization coefficient in water vapor and electronic adhesion coefficient Combined with the aforementioned water vapor partial pressure ratio The ratio of dry air partial pressure The equivalent collisional ionization coefficient of moist air was calculated using a pressure-weighted method. Equivalent adhesion coefficient to humid air As the collisional ionization coefficient in the corrected air discharge and electronic adhesion coefficient , respectively represented as: , In the formula, The collisional ionization coefficient of dry air. The coefficient of electron adhesion in dry air.

[0012] Furthermore, the fluid dynamics model is expressed as: The continuity equation for electrons, positive ions, and negative ions: , Poisson's equation for coupling electric potential and space charge: , In the formula, , , These represent the number densities of electrons, positive ions, and negative ions, respectively. For Hamiltonian operators, For electron mobility, The electron diffusion coefficient is... Represents electric field, Indicates the background photoionization source term. , These are the corrected collisional ionization coefficient and electron adhesion coefficient in air discharge, respectively. The recombination coefficient between electrons and positive ions. This represents the recombination coefficient between negative and positive ions. For positive ion mobility, The positive ion diffusion coefficient is... The diffusion coefficient of negative ions. For negative ion mobility, For electric potential, is the vacuum permittivity.

[0013] Furthermore, the step of constructing the humidity-dependent electronic temperature field includes: Let the discharge result be: , In the formula, absolute humidity The discharge results below, for At all times in space electron number density at that location for At all times in space The positive ion number density at that location for At all times in space The negative ion number density at that location for At all times in space electric field at that location, for At all times in space The potential at the point; Based on the discharge results, for each time point and each spatial location The locally reduced electric field is obtained based on the gas densities in the electric field, and is expressed as: , In the formula, for At all times in space The localized electric field at that location, absolute humidity Gas temperature Total air pressure The corresponding density of the total number of gases in the moist air mixture; Based on the mapping relationship between the localized reduced electric field and the average electron energy, the average electron energy is obtained: , In the formula, for At all times in space Average electron energy at that location To represent the mapping relationship between the local reduced electric field and the average electron energy; Based on the relationship between the average electron energy and the electron temperature, a humidity-related electron temperature field is obtained, wherein the relationship between the average electron energy and the electron temperature is expressed as: , In the formula, Boltzmann's constant, for At all times in space The electron temperature at that location; The humidity-related electronic temperature field is then expressed as: , In the formula, For humidity-dependent electron temperature field, This is the discharge region. This is the deadline.

[0014] Furthermore, in air discharge, the intrinsic luminescent component of air includes a variety of luminescent particles, the OH humidity-related luminescent component is OH free radicals formed by water participating in the reaction, and the step of estimating the concentration of the intrinsic luminescent component of air and the OH humidity-related luminescent component includes: For the intrinsically luminescent component of air, its concentration can be estimated using the following expression: , In the formula, for At all times in space Concentration of luminescent particles at that location This refers to absolute humidity. As luminescent particles, For calculating the particle number density relationship, To reduce the electric field, It is a nitrogen molecule. It is a nitrogen molecular ion. It is an oxygen molecule. It is an oxygen atom. For nitrogen atoms, It is an oxygen ion. It is a nitrogen ion; For OH radicals, the water molecule number density is first obtained based on the water vapor partial pressure ratio: , In the formula, absolute humidity Water molecule number density below absolute humidity The percentage of water vapor partial pressure at that point. The total particle number density of moist air; The OH generation rate is calculated based on the water molecule number density, and the calculation expression is as follows: , In the formula, for At all times in space OH generation rate at the location, The rate coefficient for the reaction of electrons colliding with water molecules to generate OH. For electron temperature, for At all times in space Electron number density at that location; Based on the OH generation rate, the OH number density is obtained through local time integration, and is expressed as the concentration of the OH humidity-related luminescent component as follows: , , In the formula, for At all times in space OH number density at the location for At all times in space OH loss rate at the location, This is the equivalent rate coefficient for OH loss.

[0015] Furthermore, the calculation steps for the humidity-related overall air discharge spectrum include: For any luminescent particle in the intrinsic luminescent component of air The population of the excited states of the upper energy level is calculated based on the electron temperature. The calculation expression is as follows: , In the formula, Let be the partition function with respect to the luminescent particles. for At all times in space The electron temperature at that location, This refers to absolute humidity. Boltzmann's constant, for At all times in space luminous particles In the upper energy level The particle number density, i.e., the excited state population of the upper energy level. for At all times in space Concentration of luminescent particles at that location luminescent particles In the upper energy level Statistical weights luminescent particles In the upper energy level The excitation energy; For from the upper energy level to the next energy level The transition, with central wavelength, photon energy, and spectral line intensity expressed as: , In the formula, luminescent particles From the upper energy level Jump to the next energy level The center wavelength, is Planck's constant. The speed of light in a vacuum. luminescent particles In the lower energy level The excitation energy, luminescent particles From the upper energy level Jump to the next energy level Photon energy, luminescent particles From the upper energy level Jump to the next energy level The corresponding photon frequency, for At all times in space luminous particles From the upper energy level Jump to the next energy level spectral line intensity, To from the upper energy level Jump to the next energy level Einstein's spontaneous emission coefficient; The local spectral emissivity of the luminescent particles is calculated based on the spectral line intensity and expressed as follows: , In the formula, for At all times in space Local spectral emissivity of luminescent particles at that location. It is a collection of the types of luminescent particles in the air. luminescent particles From the upper energy level Jump to the next energy level At that time, the normalized spectral line shape function after broadening and instrument response correction, luminescent particles From the upper energy level Jump to the next energy level The corresponding Doppler broadening linear function at that time, luminescent particles From the upper energy level Jump to the next energy level The corresponding Lorentz broadening linear function at that time, Let be the instrument response function of the spectral measurement system. This is a convolution operation; For the humidity-related luminescent component of OH, it is considered as a molecular luminescent component with a vibrational-rotational energy level structure, and the local spectral emissivity of OH is calculated and expressed as: , In the formula, for At all times in space Emissivity of the local OH band at that location. For OH transition sets, OH transition The corresponding local spectral line integral emissivity, For leapfrog The corresponding normalized spectral line shape function, The OH radical is in a transition state Corresponding upper energy level particle number density, For leapfrog The corresponding Einstein spontaneous emission coefficient, For leapfrog The corresponding center wavelength, for At all times in space OH number density at the location For higher energy levels Statistical weights Let be the distribution function with respect to OH. For higher energy levels Excitation energy relative to the reference energy level; By combining the local spectral emissivity of the luminescent particles and the local spectral emissivity of OH, a partial discharge spectrum considering the humidity-related luminescent components of OH is obtained, expressed as: , In the formula, for At all times in space The partial discharge spectrum at the location; For any absolute humidity and at any time The discharge region Spatial integration of the partial discharge spectrum within the region yields the humidity-dependent overall air discharge spectrum, expressed as: , In the formula, The overall air discharge spectrum is related to humidity. This represents the light collection efficiency or the observation path weight.

[0016] Furthermore, the method includes the following steps: calculating the intrinsic air spectrum, OH spectrum, OH band intensity in a specified spectral range, light intensity in a specified band, total light intensity across the entire band, and humidity-spectral response relationships under multiple humidity conditions, wherein the calculation expression for the intrinsic air spectrum is: , In the formula, The intrinsic spectrum of air, This is the discharge region. For light collection efficiency or observation path weight, for At all times in space Local spectral emissivity of luminescent particles at that location. This refers to absolute humidity. The calculation expression for the OH spectrum is as follows: , In the formula, This is the OH spectrum. for At all times in space Emissivity of the local OH band at the location; The expression for calculating the OH band intensity of the specified spectral range is as follows: , In the formula, For specified spectral band intervals The intensity of the OH band within the spectrum, The wavelength at the left end of the OH spectral band is [wavelength]. This represents the right-hand wavelength of the OH spectral band. The expression for calculating the light intensity of the specified wavelength band is: , In the formula, For a specified band Internal light intensity, The wavelength at the left end of the band. The wavelength at the right end of the band. The overall air discharge spectrum is related to humidity; The formula for calculating the total light intensity across the entire wavelength band is: , In the formula, This represents the total light intensity across the entire wavelength band. This is the starting wavelength for the entire band. This is the final wavelength across the entire band; The calculation steps for the humidity-spectral response relationship include: Select multiple absolute humidity levels Steps 1-3 are repeated for each absolute humidity level to generate an overall air discharge spectrum dataset, an OH band intensity dataset for a specified spectral range, and a total light intensity dataset across the entire spectrum, which are represented as follows: , In the formula, For the overall air discharge spectrum dataset, absolute humidity The overall air discharge spectrum below, The deadline is This represents the total number of absolute humidity levels selected. For a dataset of OH band intensity within a specified band range, absolute humidity The intensity of the OH band within the specified spectral range. This is a dataset of total light intensity across the entire wavelength band. absolute humidity Total light intensity across the entire wavelength range; Calculate the spectral difference and humidity sensitivity between any two absolute humidity levels to characterize the humidity-spectral response relationship under multiple humidity conditions, where the spectral difference and humidity sensitivity are expressed as follows: , In the formula, Due to spectral differences, They are respectively at absolute humidity and The overall air discharge spectrum below, wavelength The average sensitivity of the overall air discharge spectrum to changes in absolute humidity. To address the humidity sensitivity of OH-related luminescent components, Absolute humidity and The intensity of the OH band within a specified spectral range.

[0017] The present invention also provides an air discharge spectrum calculation system that considers changes in air humidity and OH radical luminescence, including a memory, a processor, and a program stored in the memory. When the processor executes the program, it implements the air discharge spectrum calculation method that considers changes in air humidity and OH radical luminescence as described above.

[0018] Compared with the prior art, the present invention has the following beneficial effects: (1) Existing discharge spectrum calculation methods typically do not directly incorporate air humidity as a control parameter of the discharge process into the model, thus failing to reflect the influence of humidity changes on collisional ionization, electron attachment, space charge accumulation, electric field distribution, and electron temperature field. This invention directly incorporates air humidity as a control parameter of the discharge process into the discharge model, rather than simply making empirical corrections to the final spectral intensity. The collisional ionization coefficient is corrected using water vapor partial pressure weighting. and electronic adhesion coefficient Humidity changes directly affect the electron generation and electron attachment loss terms, thus more realistically reflecting the changes in the discharge process under different humidity conditions. Based on this, the addition of the OH luminescence component and the post-processing calculation of the OH luminescence contribution term outputs spectral results that vary with humidity, making the simulated spectrum more closely resemble the actual humid air discharge spectrum.

[0019] (2) This invention uses air humidity as the input control parameter of the discharge model, mapping humidity changes to component parameters to participate in the discharge solution. In the discharge physics solution stage, the particle concentration field and electron temperature field are coupled for solution. Humidity variables directly affect the control equations of collision ionization, electron attachment, space charge accumulation, and electric field distribution, realizing bidirectional coupling calculation of multi-physics fields. It can realistically reproduce the modulation effect of humidity changes on the entire discharge process, and obtain the spatiotemporal distribution results of electric field, electron temperature, and various particle concentrations under the influence of humidity, overcoming the simulation distortion caused by the neglect of water vapor in the dry air model.

[0020] (3) Existing methods, even if they can calculate the air discharge spectrum, mostly focus on the luminescent components of dry air and lack post-processing calculations of the luminescent contribution of OH radicals or OH excited states formed after water vapor participates in the discharge. It is difficult to obtain the humidity-related characteristic bands and their evolution law with humidity. This invention introduces OH radicals or OH excited states as humidity-related luminescent components in the spectral post-processing stage, which can output the intensity of OH characteristic bands and their law with humidity, thereby making up for the deficiency that water participation in the reaction cannot be characterized when only considering the intrinsic luminescent components of dry air.

[0021] (4) This invention can output local spectrum, overall spectrum, light intensity of specified band, intensity of OH characteristic band and total light intensity, and can calculate humidity spectral sensitivity, providing a theoretical basis for partial discharge optical detection, humidity interference correction and insulation status assessment in high humidity environment.

[0022] (5) The present invention proposes a step-by-step calculation method of “humidity parameter input - humid air discharge parameter correction - fluid discharge simulation - humidity-related electron temperature field construction - OH luminescence post-processing - overall spectral integration”, which can obtain electron density, electric field, reduced electric field, humidity-related electron temperature field, luminescent particle concentration and spectral results under different humidity conditions based on the same calculation link, realizing a complete mapping from environmental humidity to discharge process and then to spectral output. Moreover, the technical link is clear, which is convenient for engineering implementation and subsequent expansion.

[0023] (6) The computational framework of this invention is not limited to a specific electrode structure. For needle-plate discharge, rod-plate discharge, surface discharge, external insulation defect discharge, and other air partial discharge structures, the same technical approach can be used to perform discharge spectrum calculations under different humidity conditions simply by changing the geometric model, boundary conditions, and target luminescent particle set. Furthermore, it can be used for discharge spectrum calculations under a single humidity condition, as well as for spectral comparison analysis under multiple humidity conditions. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the method flow of the present invention. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0026] Example 1 This embodiment provides a method for calculating air discharge spectra that considers changes in air humidity and OH free radical luminescence, including: S1. Input the discharge structure and air environment parameters to determine the gas number density and humidity characterization quantities.

[0027] First, input the environmental, geometric, and electrical parameters of the object to be discharged. Environmental parameters must include at least the gas temperature. Total air pressure absolute humidity or relative humidity Geometric parameters include electrode shape, gap distance, computational domain, and boundary conditions; electrical parameters include applied voltage. Electrode polarity, initial electron density, or background ionization source term.

[0028] The gas number density, reduced electric field, and water vapor partial pressure ratio in the air are constructed as follows: (1) in, This represents the total number density of particles in moist air. Represents the reduced electric field. Indicates the partial pressure of dry air. Indicates the partial pressure of water vapor. Indicates the percentage of water vapor partial pressure. This indicates the percentage of dry air partial pressure.

[0029] When the input is relative humidity At that time, the partial pressure of water vapor can be written as: (2) In the formula, For water vapor partial pressure, This is the partial pressure of saturated water vapor.

[0030] When the input is absolute humidity At that time, the partial pressure of water vapor can be written as: (3) In the formula, This refers to the saturated humidity of the air.

[0031] In one specific implementation, take The air saturation humidity is The partial pressure of saturated water vapor is ,but: (4) in by Unit. If ,but .

[0032] S2. Set the basic discharge parameters for dry air.

[0033] Before considering humidity correction, first set the collisional ionization coefficient of dry air in dry air. Dry air electronic adhesion coefficient Electron mobility Positive and negative ion mobility Electron diffusion coefficient and composite coefficient , The recombination coefficient between electrons and positive ions. Let be the recombination coefficient between negative and positive ions. The collisional ionization coefficient of dry air It can be written as: (5) To avoid long formulas affecting readability, we first define two reduced electric field thresholds: (6) Corresponding dry air adhesion coefficient for: (7) Positive ion mobility, negative ion mobility, and electron mobility can be written as: (8) (9) Electron diffusion coefficient and composite coefficient It can be written as: (10) in, Indicates standard atmospheric pressure. This represents the current air pressure. The above parameters can be used as basic parameters for dry air models, or they can be replaced based on experimental calibration, transport databases, or the results of solving the Boltzmann equations.

[0034] S3. Correct the collision ionization coefficient and electron adhesion coefficient in air discharge based on air humidity.

[0035] After obtaining the water vapor partial pressure ratio Then, the collisional ionization coefficient in water vapor was further set. and adhesion coefficient In one embodiment, it can be taken in the following form: (11) (12) Equivalent collisional ionization coefficient of moist air Equivalent adhesion coefficient to humid air The result is obtained by weighting the partial pressure ratios of dry air and water vapor: (13) exist And based on absolute humidity In the specific implementation of the input quantity: (14) Through the above processing, humidity is no longer merely an empirical correction term for output light intensity, but directly enters the electron generation and electron attachment loss terms of the discharge control equation. For regions with strongly non-uniform electric fields, if... And under high field strength If the humidity no longer increases significantly, then the increased humidity will enhance the local collisional ionization effect, which will be transmitted to electron temperature, particle concentration and spectral intensity through discharge simulation.

[0036] S4. Substitute the humidity correction parameters into the fluid dynamics model and calculate the discharge process.

[0037] The corrected collisional ionization coefficient and electron adhesion coefficient in air discharge , Substitute the equations for continuity of electrons, positive ions, and negative ions. Let... , , These represent the number densities of electrons, positive ions, and negative ions, respectively. Represents electric field, If we represent the background photoionization source term, then the hydrodynamic model can be expressed as: (15) In the formula, For Hamiltonian operators, The positive ion diffusion coefficient is... is the diffusion coefficient of negative ions.

[0038] Electric potential and space charge are coupled through Poisson's equation: (16) In the formula, For electric potential, is the vacuum permittivity.

[0039] In one specific implementation, the photoionization term can be approximated by background ionization: (17) in The parameters can be set based on the discharge medium, gas pressure, geometry, and numerical stability. Solving the above equations yields results under different humidity conditions: (18) In the formula, absolute humidity The discharge results below, for At all times in space electron number density at that location for At all times in space The positive ion number density at that location for At all times in space The negative ion number density at that location for At all times in space electric field at that location, for At all times in space The electric potential at that point.

[0040] S5. Construct a humidity-dependent electron temperature field from the humidity-corrected discharge results.

[0041] For each spatial location and each time step The locally reduced electric field is obtained based on the electric field and the gas number density: (19) In the formula, for At all times in space The localized electric field at that location, absolute humidity Gas temperature Total air pressure The corresponding density of the total gas volume in the moist air mixture, under the ideal gas approximation, is: , absolute humidity The partial pressure of dry air in moist air under certain conditions. absolute humidity The partial pressure of water vapor in humid air under certain conditions.

[0042] Based on the pre-established mapping relationship between the reduced electric field and the average electron energy, the average electron energy is obtained: (20) in, for At all times in space Average electron energy at that location This can be obtained by solving the Boltzmann equation, calculating with BOLSIG+, looking up tables in transport databases, or experimental calibration, representing the mapping relationship between the locally reduced electric field and the average electron energy. Further, based on the relationship between the average electron energy and the electron temperature: (twenty one) In the formula, Boltzmann's constant, for At all times in space The electron temperature at that location.

[0043] This yields the humidity-dependent electronic temperature field: (twenty two) In the formula, This is the discharge region. The deadline is The humidity-dependent electron temperature field serves as a core bridge for subsequent local spectral calculations, enabling the influence of humidity on discharge parameters to be transferred to the calculation of excited-state population and radiation intensity.

[0044] S6. Reconstruct the intrinsic luminescent particles of air and the luminescent components related to OH humidity.

[0045] In air discharge, the primary intrinsic luminescent component of air may include nitrogen molecules. Nitrogen molecular ions oxygen atoms nitrogen atoms oxygen ions And OH radicals formed by water participation in the reaction. For the intrinsically luminescent components of ordinary air, the concentration can be estimated based on the electron density, ion density, reaction rate, or empirical coefficients obtained from discharge simulation. (twenty three) In the formula, absolute humidity Water molecule number density below for At all times in space Concentration of luminescent particles at that location Based on the number densities of electrons, positive ions, and negative ions, electron temperature, localized reduced electric field, and absolute humidity, combined with luminescent particles... The corresponding particle number density calculation relationship is established based on the generation and loss reactions. It is an oxygen molecule. It is a nitrogen ion.

[0046] For OH radicals, the water molecule number density is first obtained from the water vapor partial pressure ratio: (twenty four) In the formula, absolute humidity The percentage of water vapor partial pressure at that point. The total particle number density of moist air.

[0047] The OH generation rate can be calculated based on electron collision dissociation, water molecule excited dissociation, or empirical reaction rates. In one embodiment, it can be written as: (25) in, for At all times in space OH generation rate at the location, The rate coefficient representing the reaction rate at which electrons collide with water molecules to generate OH radicals. For electron temperature, for At all times in space The OH number density at a given location, which serves as the concentration of the OH humidity-related luminescent component. for At all times in space OH loss rate at the location, This represents the equivalent rate coefficient of OH loss.

[0048] The OH number density can be obtained by local time integration: (26) in, This indicates the rate of OH formation.

[0049] When simplifying calculations or making rapid estimations in engineering, the following approximation can also be used: (27) in, This is an empirical correction factor for humidity's role in OH formation. The equivalent rate coefficient for OH formation. The calculation time step is specified. Both of the above methods can be used to incorporate the OH luminescent component formed by water vapor in the reaction into the spectral post-processing.

[0050] S7. Calculate the local emission spectra of the intrinsic luminescent components of air and the OH component.

[0051] For any luminous particle The excited state population of the upper energy level is calculated based on the electron temperature. Let... For higher energy levels, If the lower energy level is the base level, then the partition function and the particle number density of the upper energy level are: (28) In the formula, Let be the partition function with respect to the luminescent particles. for At all times in space luminous particles In the upper energy level The particle number density, i.e., the excited state population of the upper energy level. luminescent particles In the upper energy level Statistical weights luminescent particles In the upper energy level The excitation energy.

[0052] For from the upper energy level to the next energy level The transition, with central wavelength, photon energy, and spectral line intensity as follows: (29) In the formula, luminescent particles From the upper energy level Jump to the next energy level The center wavelength, is Planck's constant. The speed of light in a vacuum. luminescent particles In the lower energy level The excitation energy, luminescent particles From the upper energy level Jump to the next energy level Photon energy, luminescent particles From the upper energy level Jump to the next energy level The corresponding photon frequency, for At all times in space luminous particles From the upper energy level Jump to the next energy level spectral line intensity, To from the upper energy level Jump to the next energy level Einstein's spontaneous emission coefficient.

[0053] The spectral line shape function can be Gaussian, Lorentz, Voigt line shape, or instrument response convolution. In one embodiment, the local spectral emissivity of the luminescent particle is written as: (30) In the formula, for At all times in space Local spectral emissivity of luminescent particles at that location. It is a collection of the types of luminescent particles in the air. luminescent particles From the upper energy level Jump to the next energy level At that time, the normalized spectral line shape function after broadening and instrument response correction, luminescent particles From the upper energy level Jump to the next energy level The corresponding Doppler broadening linear function at that time, luminescent particles From the upper energy level Jump to the next energy level The corresponding Lorentz broadening linear function at that time, Let be the instrument response function of the spectral measurement system. This is a convolution operation.

[0054] For OH to emit light, OH can be considered as a molecular luminescent component with a vibrational-rotational energy level structure. Let the OH transition set be... Then the emissivity of the local OH band can be written as: (31) In the formula, for At all times in space Emissivity of the local OH band at that location. OH transition The corresponding local spectral line integral emissivity, For leapfrog The corresponding normalized spectral line shape function, Treatment of OH radical transitions Corresponding upper energy level particle number density, For leapfrog The corresponding Einstein spontaneous emission coefficient, For leapfrog The corresponding center wavelength, For higher energy levels Statistical weights For higher energy levels Excitation energy relative to the reference energy level.

[0055] Finally, considering the humidity-related luminescent components of OH, the partial discharge spectrum is as follows: (32) In the formula, for At all times in space The partial discharge spectrum at the location.

[0056] S8. Spatial integration of the local spectrum yields the overall air discharge spectrum, OH band intensity, and total light intensity.

[0057] For any absolute humidity and any time step The discharge region Spatial integration of the partial discharge spectrum within the air is performed to obtain the humidity-dependent overall air discharge spectrum: (33) in, The overall air discharge spectrum is related to humidity. For light collection efficiency or observation path weight, Indicates light collection efficiency or observation path weight. The intrinsic spectrum of air, for At all times in space Local spectral emissivity of luminescent particles at that location. This is the OH spectrum. for At all times in space The local spectral emissivity of the OH band at a given location. If a discrete grid is used for calculation, the spatial integral can be written as: (34) In the formula, The overall air discharge spectrum is related to humidity.

[0058] Spectral band interval The intensity of the OH band is: (35) In the formula, For specified spectral band intervals The intensity of the OH band within the spectrum, The wavelength at the left end of the OH spectral band is [wavelength]. This represents the right-hand wavelength of the OH spectral band.

[0059] Specified band The light intensity within the range and the total light intensity across the entire wavelength are: (36) In the formula, For a specified band Internal light intensity, The wavelength at the left end of the band. The wavelength at the right end of the band. This represents the total light intensity across the entire wavelength band. This is the starting wavelength for the entire band. This is the final wavelength across the entire band.

[0060] Through the above calculations, we can obtain the humidity-related overall air discharge spectrum, the intrinsic air spectrum, the OH spectrum, the OH band intensity, the light intensity of the specified band, and the total light intensity.

[0061] S9. Repeatedly calculate and output the humidity-spectral response relationship for multiple absolute humidity conditions.

[0062] Select multiple absolute humidity levels Repeat steps S1 through S8 for each absolute humidity level. The overall output can be represented as: (37) In the formula, For the overall air discharge spectrum dataset, absolute humidity The overall air discharge spectrum below, The deadline is This represents the total number of absolute humidity levels selected. This is a dataset of OH band intensities for a specified band range.

[0063] Furthermore, the spectral difference and humidity sensitivity between any two absolute humidity conditions can be calculated: (38) In the formula, Due to spectral differences, They are respectively at absolute humidity and The overall air discharge spectrum below, wavelength The average sensitivity of the overall air discharge spectrum to changes in absolute humidity. To address the humidity sensitivity of OH-related luminescent components, Absolute humidity and The intensity of the OH band within a specified spectral range.

[0064] This spectral difference and humidity sensitivity are used to characterize the humidity-spectral response relationship under multiple humidity conditions, for example: when , or A positive value indicates that the corresponding spectral intensity increases with increasing absolute humidity; a negative value indicates that the corresponding spectral intensity decreases with increasing absolute humidity; the larger the absolute value, the more sensitive the corresponding wavelength or OH band is to changes in humidity. By repeatedly calculating at multiple absolute humidity levels, the response curves of the overall air discharge spectrum and the OH band intensity as a function of absolute humidity can be obtained.

[0065] The final output results include at least: discharge electric field distribution, electron density distribution, humidity-related electron temperature field, local radiation spectrum, global radiation spectrum, OH band intensity, total light intensity, humidity sensitivity curve, and characteristic ratios for diagnosis under different humidity conditions.

[0066] In summary, the above method inputs humidity parameters into the discharge model in advance, corrects the collisional ionization coefficient and electron adhesion coefficient by weighting water vapor partial pressure, obtains the electric field, electron density, ion density, reduced electric field and electron temperature field under different humidity conditions through discharge simulation, and finally introduces OH luminescent components in the spectral post-processing stage, superimposing them with the intrinsic emission spectral lines of air to obtain the local radiation spectrum, overall radiation spectrum, OH characteristic band intensity, light intensity of specified bands and total light intensity under different humidity conditions.

[0067] Example 2 This embodiment provides an air discharge spectrum calculation system that considers changes in air humidity and OH radical luminescence, including a memory, a processor, and a program stored in the memory. When the processor executes the program, it implements the air discharge spectrum calculation method that considers changes in air humidity and OH radical luminescence as described in Embodiment 1 above.

[0068] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0069] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present invention can be implemented using various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0070] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0071] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0072] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0073] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0074] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for calculating air discharge spectra considering changes in air humidity and OH radical luminescence, characterized in that, Includes the following steps: Step 1: Obtain the basic discharge parameters of dry air, as well as the discharge structure parameters and environmental parameters of the object to be discharged, and calculate the water vapor partial pressure and dry air partial pressure based on the air humidity. Step 2: Based on the partial pressure of water vapor and dry air, the collisional ionization coefficient in air discharge is corrected using a pressure-weighted method. and electronic adhesion coefficient Based on the corrected results, the discharge process was calculated using a fluid dynamics model, and the discharge results under different humidity conditions were obtained. Step 3: Based on the discharge results, construct a humidity-related electron temperature field, estimate the concentrations of the intrinsic luminescent components of air and the humidity-related luminescent components of OH, and then calculate the humidity-related overall air discharge spectrum based on the concentrations.

2. The method for calculating air discharge spectra considering changes in air humidity and OH radical luminescence according to claim 1, characterized in that, The basic discharge parameters of dry air include the dry air collision ionization coefficient. Dry air electronic adhesion coefficient Electron mobility Positive ion mobility Negative ion mobility Electron diffusion coefficient and composite coefficient , The recombination coefficient between electrons and positive ions. The recombination coefficient between negative and positive ions; The discharge structure parameters include geometric parameters and electrical parameters. The geometric parameters include electrode shape, gap distance, calculation region, and boundary conditions. The electrical parameters include applied voltage. Electrode polarity, initial electron density, or background ionization source term; The environmental parameters include gas temperature. Total air pressure absolute humidity or relative humidity .

3. The method for calculating air discharge spectra considering changes in air humidity and OH free radical luminescence according to claim 1, characterized in that, The formula for calculating the partial pressure of water vapor is: When using relative humidity The formula for calculating the partial pressure of water vapor is: ， In the formula, For water vapor partial pressure, The partial pressure of saturated water vapor. The gas temperature; When using absolute humidity The formula for calculating the partial pressure of water vapor is: ， In the formula, The air saturation humidity; The formula for calculating the partial pressure of dry air is: ， In the formula, Total air pressure This is the partial pressure of dry air.

4. The method for calculating air discharge spectra considering changes in air humidity and OH radical luminescence according to claim 1, characterized in that, The collisional ionization coefficient in the corrected air discharge and electronic adhesion coefficient The steps include: Based on the water vapor partial pressure and dry air partial pressure, the proportions of water vapor partial pressure and dry air partial pressure are calculated respectively. When relative humidity is used... The formula for calculating the percentage of water vapor partial pressure is as follows: ， In the formula, The percentage of water vapor partial pressure. The partial pressure of saturated water vapor. For gas temperature, Total air pressure; When using absolute humidity The formula for calculating the percentage of water vapor partial pressure is as follows: ， In the formula, The air saturation humidity; The formula for calculating the percentage of dry air partial pressure is: ， In the formula, This represents the percentage of dry air partial pressure. The partial pressure of dry air; Set the collisional ionization coefficient in water vapor and electronic adhesion coefficient Combined with the aforementioned water vapor partial pressure ratio The ratio of dry air partial pressure The equivalent collisional ionization coefficient of moist air was calculated using a pressure-weighted method. Equivalent adhesion coefficient to humid air As the collisional ionization coefficient in the corrected air discharge and electronic adhesion coefficient , respectively represented as: ， In the formula, The collisional ionization coefficient of dry air. The coefficient of electron adhesion in dry air.

5. The method for calculating air discharge spectra considering changes in air humidity and OH radical luminescence according to claim 1, characterized in that, The fluid dynamics model is expressed as follows: The continuity equation for electrons, positive ions, and negative ions: ， Poisson's equation for coupling electric potential and space charge: ， In the formula, , , These represent the number densities of electrons, positive ions, and negative ions, respectively. For Hamiltonian operators, For electron mobility, The electron diffusion coefficient is... Represents electric field, Indicates the background photoionization source term. , These are the corrected collisional ionization coefficient and electron adhesion coefficient in air discharge, respectively. The recombination coefficient between electrons and positive ions. This represents the recombination coefficient between negative and positive ions. For positive ion mobility, The positive ion diffusion coefficient is... The diffusion coefficient of negative ions. For negative ion mobility, For electric potential, is the vacuum permittivity.

6. The method for calculating air discharge spectra considering changes in air humidity and OH radical luminescence according to claim 1, characterized in that, The steps for constructing the humidity-related electronic temperature field include: Let the discharge result be: ， In the formula, absolute humidity The discharge results below, for At all times in space electron number density at that location for At all times in space The positive ion number density at that location for At all times in space The negative ion number density at that location for At all times in space electric field at that location, for At all times in space The potential at the point; Based on the discharge results, for each time point and each spatial location The locally reduced electric field is obtained based on the gas densities in the electric field, and is expressed as: ， In the formula, for At all times in space The localized electric field at that location, absolute humidity Gas temperature Total air pressure The corresponding density of the total number of gases in the moist air mixture; Based on the mapping relationship between the localized reduced electric field and the average electron energy, the average electron energy is obtained: ， In the formula, for At all times in space Average electron energy at that location To represent the mapping relationship between the local reduced electric field and the average electron energy; Based on the relationship between the average electron energy and the electron temperature, a humidity-related electron temperature field is obtained, wherein the relationship between the average electron energy and the electron temperature is expressed as: ， In the formula, Boltzmann's constant, for At all times in space The electron temperature at that location; The humidity-related electronic temperature field is then expressed as: ， In the formula, For humidity-dependent electron temperature field, This is the discharge region. This is the deadline.

7. The method for calculating air discharge spectra considering changes in air humidity and OH radical luminescence according to claim 1, characterized in that, In air discharge, the intrinsic luminescent component of air includes various luminescent particles, and the OH humidity-related luminescent component is an OH free radical formed by the reaction of water. The step of estimating the concentration of the intrinsic luminescent component of air and the OH humidity-related luminescent component includes: For the intrinsically luminescent component of air, its concentration can be estimated using the following expression: ， In the formula, for At all times in space Concentration of luminescent particles at that location This refers to absolute humidity. As luminescent particles, For calculating the particle number density relationship, To reduce the electric field, It is a nitrogen molecule. It is a nitrogen molecular ion. It is an oxygen molecule. It is an oxygen atom. For nitrogen atoms, It is an oxygen ion. It is a nitrogen ion; For OH radicals, the water molecule number density is first obtained based on the water vapor partial pressure ratio: ， In the formula, absolute humidity Water molecule number density below absolute humidity The percentage of water vapor partial pressure at that point. The total particle number density of moist air; The OH generation rate is calculated based on the water molecule number density, and the calculation expression is as follows: ， In the formula, for At all times in space OH generation rate at the location, The rate coefficient for the reaction of electrons colliding with water molecules to generate OH. For electron temperature, for At all times in space Electron number density at that location; Based on the OH generation rate, the OH number density is obtained through local time integration, and is expressed as the concentration of the OH humidity-related luminescent component as follows: ， ， In the formula, for At all times in space OH number density at the location for At all times in space OH loss rate at the location, This is the equivalent rate coefficient for OH loss.

8. The method for calculating air discharge spectra considering changes in air humidity and OH radical luminescence according to claim 1, characterized in that, The calculation steps for the humidity-related overall air discharge spectrum include: For any luminescent particle in the intrinsic luminescent component of air The population of the excited states of the upper energy level is calculated based on the electron temperature. The calculation expression is as follows: ， In the formula, Let be the partition function with respect to the luminescent particles. for At all times in space The electron temperature at that location, This refers to absolute humidity. Boltzmann's constant, for At all times in space luminous particles In the upper energy level The particle number density, i.e., the excited state population of the upper energy level. for At all times in space Concentration of luminescent particles at that location luminescent particles In the upper energy level Statistical weights luminescent particles In the upper energy level The excitation energy; For from the upper energy level to the next energy level The transition, with central wavelength, photon energy, and spectral line intensity expressed as: ， In the formula, luminescent particles From the upper energy level Jump to the next energy level The center wavelength, is Planck's constant. The speed of light in a vacuum. luminescent particles In the lower energy level The excitation energy, luminescent particles From the upper energy level Jump to the next energy level Photon energy, luminescent particles From the upper energy level Jump to the next energy level The corresponding photon frequency, for At all times in space luminous particles From the upper energy level Jump to the next energy level spectral line intensity, To from the upper energy level Jump to the next energy level Einstein's spontaneous emission coefficient; The local spectral emissivity of the luminescent particles is calculated based on the spectral line intensity and expressed as follows: ， In the formula, for At all times in space Local spectral emissivity of luminescent particles at that location. It is a collection of the types of luminescent particles in the air. luminescent particles From the upper energy level Jump to the next energy level At that time, the normalized spectral line shape function after broadening and instrument response correction, luminescent particles From the upper energy level Jump to the next energy level The corresponding Doppler broadening linear function at that time, luminescent particles From the upper energy level Jump to the next energy level The corresponding Lorentz broadening linear function at that time, Let be the instrument response function of the spectral measurement system. This is a convolution operation; For the humidity-related luminescent component of OH, it is considered as a molecular luminescent component with a vibrational-rotational energy level structure, and the local spectral emissivity of OH is calculated and expressed as: ， In the formula, for At all times in space Emissivity of the local OH band at that location. For OH transition sets, OH transition The corresponding local spectral line integral emissivity, For leapfrog The corresponding normalized spectral line shape function, The OH radical is in a transition state Corresponding upper energy level particle number density, For leapfrog The corresponding Einstein spontaneous emission coefficient, For leapfrog The corresponding center wavelength, for At all times in space OH number density at the location For higher energy levels Statistical weights Let be the distribution function with respect to OH. For higher energy levels Excitation energy relative to the reference energy level; By combining the local spectral emissivity of the luminescent particles and the local spectral emissivity of OH, a partial discharge spectrum considering the humidity-related luminescent components of OH is obtained, expressed as: ， In the formula, for At all times in space The partial discharge spectrum at the location; For any absolute humidity and at any time The discharge region Spatial integration of the partial discharge spectrum within the region yields the humidity-dependent overall air discharge spectrum, expressed as: ， In the formula, The overall air discharge spectrum is related to humidity. This represents the light collection efficiency or the observation path weight.

9. The method for calculating air discharge spectra considering changes in air humidity and OH radical luminescence according to claim 1, characterized in that, It also includes the following steps: Calculate the intrinsic air spectrum, OH spectrum, OH band intensity within a specified spectral range, light intensity in a specified wavelength range, total light intensity across the entire wavelength range, and the humidity-spectral response relationship under multiple humidity conditions. The expression for calculating the intrinsic air spectrum is as follows: ， In the formula, The intrinsic spectrum of air, This is the discharge region. For light collection efficiency or observation path weight, for At all times in space Local spectral emissivity of luminescent particles at that location. This refers to absolute humidity. The calculation expression for the OH spectrum is as follows: ， In the formula, This is the OH spectrum. for At all times in space Emissivity of the local OH band at the location; The expression for calculating the OH band intensity of the specified spectral range is as follows: ， In the formula, For specified spectral band intervals The intensity of the OH band within the spectrum, The wavelength at the left end of the OH spectral band is [wavelength]. This represents the right-hand wavelength of the OH spectral band. The expression for calculating the light intensity of the specified wavelength band is: ， In the formula, For a specified band Internal light intensity, The wavelength at the left end of the band. The wavelength at the right end of the band. The overall air discharge spectrum is related to humidity; The formula for calculating the total light intensity across the entire wavelength band is: ， In the formula, This represents the total light intensity across the entire wavelength band. This is the starting wavelength for the entire band. This is the final wavelength across the entire band; The calculation steps for the humidity-spectral response relationship include: Select multiple absolute humidity levels Steps 1-3 are repeated for each absolute humidity level to generate an overall air discharge spectrum dataset, an OH band intensity dataset for a specified spectral range, and a total light intensity dataset across the entire spectrum, which are represented as follows: ， In the formula, For the overall air discharge spectrum dataset, absolute humidity The overall air discharge spectrum below, The deadline is This represents the total number of absolute humidity levels selected. For a dataset of OH band intensity within a specified band range, absolute humidity The intensity of the OH band within the specified spectral range. This is a dataset of total light intensity across the entire wavelength band. absolute humidity Total light intensity across the entire wavelength range; Calculate the spectral difference and humidity sensitivity between any two absolute humidity levels to characterize the humidity-spectral response relationship under multiple humidity conditions, where the spectral difference and humidity sensitivity are expressed as follows: ， In the formula, Due to spectral differences, They are respectively at absolute humidity and The overall air discharge spectrum below, wavelength The average sensitivity of the overall air discharge spectrum to changes in absolute humidity. To address the humidity sensitivity of OH-related luminescent components, Absolute humidity and The intensity of the OH band within a specified spectral range.

10. An air discharge spectrum calculation system considering changes in air humidity and OH radical luminescence, comprising a memory, a processor, and a program stored in the memory, characterized in that, When the processor executes the program, it implements an air discharge spectrum calculation method that considers changes in air humidity and OH free radical luminescence, as described in any one of claims 1-9.

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