Laser absorption spectrum combustion diagnosis method for turbulent flame time-average characteristics
A technology of laser absorption spectroscopy and diagnosis method, applied in the field of combustion diagnosis, can solve problems such as the inability to eliminate the influence of turbulent pulsation and the error of measurement results.
Active Publication Date: 2021-09-07
SICHUAN UNIV
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the quasi-steady-state assumption and axisymmetric assumption of this scheme are not actually valid, and because the spectral line intensity is a nonlinear function of temperature, in theory, the arithmetic mean cannot eliminate the influence of turbulent fluctuations, ignoring the influence of turbulent fluctuations on the absorption The influence brought by the spectral signal will inevitably introduce errors in the measurement results
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0028] see Figure 1-Figure 5 , this example selects the measurement of the heat-following turbulent jet flame for analysis. According to the implementation steps of the present invention, this embodiment selects 4029.524 cm-1 、4030.728 cm -1 、7444.36 cm -1 as a measurement line. Firstly, the turbulent fluctuations are simulated for the selected absorption lines. As a note, figure 1 shows the impact on the time-average line strength after the introduction...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a laser absorption spectrum combustion diagnosis method for turbulent flame time-average characteristics. The method comprises the steps of carrying out the time-average signal collection of a turbulent flame for a specific period of time, considering the influence caused by turbulent pulsation, and carrying out the corresponding correction in a data processing stage, thereby obtaining an accurate time-average absorption spectrum signal, and inverting reliable turbulent flame time-average characteristic information to effectively improve the accuracy of measuring the turbulent flame by using the laser absorption spectrum. According to the laser absorption spectrum combustion diagnosis method, by considering the influence brought by the turbulence pulsation in the turbulence flame, the relationship between the absorption turbulence correction and the turbulence pulsation is established, the corresponding pulsation amplitude can be solved while the temperature, concentration and pressure parameters are solved, more accurate and comprehensive turbulence flame time-average measurement data can be obtained, and meanwhile, a turbulence correction table can be constructed in advance and can be repeatedly used, so that the post-processing speed is not obviously different from the post-processing speed of an existing scheme, and the scheme can be adopted for general turbulence flow and the influence of turbulence in the atmosphere.
Description
technical field [0001] The invention relates to the technical field of combustion diagnosis, in particular to a laser absorption spectrum combustion diagnosis method of time-averaged characteristics of turbulent flames. Background technique [0002] Turbulent flame is the most common combustion process in energy power devices such as daily life, transportation, industrial production and aerospace. This process is often accompanied by complex chemical reactions, heat and mass transfer and fluid transport phenomena. Realizing reliable and accurate measurement of turbulent flame has important scientific significance and engineering value. With the continuous development of scientific needs and sensor technology, laser absorption spectroscopy has been widely used in the field of combustion diagnosis in the past forty years due to its many advantages such as non-contact, calibration-free, fast response, low measurement cost and easy integration. A large number of absorption spec...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): F23M11/04
CPCF23M11/045
Inventor 张健鹏马柳昊任伟段锟
Owner SICHUAN UNIV