15 results about "Ice nucleus" patented technology

The invention discloses an intelligent smoke furnace catalysis operation condition suitability grading method. The method comprises the steps that basic parameters of an operation point are obtained; calling a Passive-Toner algorithm to calculate the atmospheric stability grade of the operation point; the continuous cigarette lighting source intensity is calculated according to the used flame bar combustion data; calculating the vertical airflow distribution of the operation point by adopting a Matviyerv vertical velocity theoretical model based on the altitude and vertical airflow observation data of the operation point; based on the continuous cigarette lighting source intensity, calculating the ice nucleus number concentration distribution in the cloud in combination with the vertical airflow distribution and the horizontal wind field; calculating an operation suitability index by adopting a comprehensive index algorithm in combination with the lifting condensation height, the cloud amount and the cloud classification data; and performing grading processing on the job suitability index according to a set threshold value combination so as to output a plurality of job suitability grading results. According to the method, comprehensive analysis is carried out by considering the meteorological condition and the catalytic condition of the operation point, so that the accuracy and the credibility of an operation condition suitability judgment result are improved to a certain extent.

The invention discloses a radio frequency assisted freezing system which comprises a radio frequency generation module, a radio frequency processing module, a low-temperature freezing module and an optical fiber temperature measurement module, the radio frequency generation module can provide stable pulse radio frequency signals and comprises a radio frequency generator, a relay pulse generator and an impedance matcher, and the relay pulse generator and the impedance matcher are electrically connected with the radio frequency generator. The radio frequency processing module is used for providing a radio frequency action space for food and comprises a radio frequency processing device, the low-temperature freezing module can provide freezing cooling capacity for the system and comprises a low-temperature refrigerator, the impedance matcher and the radio frequency processing device are arranged in the low-temperature refrigerator, and the optical fiber temperature measuring module is arranged on the outer side of the low-temperature refrigerator; and the optical fiber temperature measurement module is used for accurately monitoring the food temperature. Through the synergistic effect of the radio frequency field and low-temperature freezing, the crystallization process of water molecules in the food can be effectively interfered, the food is promoted to generate an obvious supercooling phenomenon, a large number of ice nucleuses are formed at the temperature lower than the freezing point in an explosive mode finally, and the final quality of the frozen food is greatly improved.

The invention relates to the technical field of ice crystal generation, and discloses an ice crystal test device for a straight-flow wind tunnel, which is connected to one side of a wind tunnel air inlet and comprises an ultrasonic nebulizer, a mixing chamber, a first air pump and an ice nucleating agent ejector, and the ultrasonic nebulizer is connected with one side of the wind tunnel air inlet and used for providing water mist for a test section of the wind tunnel; the mixing chamber comprises two inlet ends and an outlet end, a water mist outlet of the ultrasonic nebulizer is communicated with one inlet end of the mixing chamber, the outlet end of the mixing chamber extends towards one side of an air inlet of the wind tunnel, and the air conveying end of the first air pump is communicated with the other inlet end of the mixing chamber through a first pipeline; the first air pump is used for conveying mist formed by mixing the water mist gas and the water mist into the wind tunnel, the ice nucleation agent ejector is used for providing an ice nucleation agent into a test section of the wind tunnel, and the air conveying end of the first air pump is further communicated with the ice nucleation agent ejector through a second pipeline and used for providing power for enabling the ice nucleation agent to enter the test section.

The invention discloses a method for improving sand and dust numerical forecasting through assimilation-aerosol-cloud-radiation, and the method comprises the steps: building a sand and dust storm forecasting mode, calculating sand and dust optical parameters based on a spherical particle extinction theory, and achieving the bidirectional feedback of sand and dust to weather; a sand and dust aerosol-cloud interaction ice nucleus nucleation mechanism is given, a sand and dust CCN type aerosol homogeneous freezing process is realized, a radiation variable temperature rate is calculated and fed back to a weather mode power process, and bidirectional feedback of weather-driven sand and dust and influence of sand and dust on weather is formed; constructing an ensemble forecasting module, performing time and space related disturbance on a meteorological initial field, a boundary condition and an aerosol initial concentration, and performing ensemble forecasting after a mode is input; and establishing an ensemble assimilation analysis correction module, constructing a background error covariance matrix by utilizing mode ensemble forecasting, disturbing observation at an analysis moment, and assimilating and correcting the initial concentration of the mode aerosol based on a localized ensemble Kalman filtering method to obtain a forecasting result.

A method for reducing probability of ice nucleation during preservation of biological matter in isochoric systems by placing biological matter in a flexible, impermeable inner container, adding an inner solution with a melting point that is higher than a desired storage temperature, removing bulk gas from and sealing the inner container, placing the inner container in a rigid, non-thermally insulating outer container, filling the space between the inner and outer containers with an outer solution, removing bulk gas from and sealing the outer container, cooling the system to the desired storage temperature, maintaining the desired storage temperature for a desired storage period, warming the system to a temperature that is higher than the desired storage temperature, unsealing the outer and inner containers, and removing the biological matter. The outer solution has a melting point that is lower than the equilibrium melting point of the biological matter and the inner solution.

The present disclosure provides a calculation method based on the maximum height of catalyst diffusion when the optimal number concentration of ice nuclei in the cloud, comprising establishing a diffusion calculation coordinate system; constructing a wind field model describing the distribution of horizontal wind speed and vertical airflow with height, deriving the lifting trajectory of the center line of the smoke plume with the downwind distance; establishing a concentration distribution analytical model describing the three-dimensional space of the catalyst in the coordinate system; simplifying the concentration distribution analytical model, and solving to obtain the predicted height based on the concentration dilution criterion; based on the vertical airflow velocity distribution model in the wind field model and the preset vertical airflow decay threshold, the critical height based on the limit of dynamic lifting ability is solved; taking the minimum value of the predicted height and the critical height as the maximum height of the catalyst diffusion, the method can comprehensively consider the vertical airflow lifting effect, and the calculation is simple and fast, solving the problems of large prediction deviation caused by ignoring the vertical airflow in the existing model and poor practicability caused by complex calculation.

The application belongs to the technical field of aircraft deicing parameter control and processing, and discloses a kind of aircraft secondary icing time margin control method, system and computer equipment.The method is by collecting meteorological parameters and aircraft primary deicing parameters, testing aircraft surface roughness related data, computer body surface residual deicing fluid concentration;Calculate the critical radius of ice nucleus and the free energy of ice phase interface in the initial stage of the body surface icing with deicing fluid residue;Calculate the wall ice nucleus nucleation rate and ice nucleus growth rate;Calculate the ice crystal coverage rate in the near-wall space of the body surface and the secondary icing time margin.The control method has the characteristics of low cost, easy implementation, strong anti-interference ability, etc., can predict the secondary icing time margin and icing time point of the whole aircraft, provide scientific and accurate reference for dispatching command department, and effectively improve the flight take-off and landing efficiency.

The method and device for determining the catalytic efficiency of the artificial ice nucleus material provided by the embodiments of the present disclosure comprise the following steps: determining the three-dimensional reconstruction graph and the lattice mismatch degree of the biological macromolecular multi-scale complex according to a preset first observation condition; determining the thermodynamic evaluation result based on the three-dimensional reconstruction graph, the lattice mismatch degree and a preset second observation condition; obtaining the process image of the newly generated ice crystal front surface based on a preset third observation condition; extracting the newly generated ice crystal front surface advancing contour line and the differentiated time track path from the process image according to a space reference; determining the catalytic rate order jump according to the advancing contour line and the differentiated time track path; obtaining the extreme catalytic efficiency quantitative result; realizing the analysis of the biological macromolecular multi-scale complex native hydration folding conformation; accurately positioning and quantifying the core nucleation active center; and providing the quantitative backstepping mechanism of the interface polarity and the thermodynamic nucleation potential barrier.

The invention discloses a wind driven generator blade icing monitoring method, and particularly relates to the technical field of wind power generation. According to the method, a multi-dimensional primary ice condition feature tensor is constructed, thermal anomaly spot density, stress amplitude change rate and disturbance frequency anomaly indexes are extracted, a blade surface multi-scale feature topology network is constructed based on node feature relevancy, and a potential freezing point coupling aggregation area is identified; further, through an energy change entropy calculation and regression prediction model, outputting a dynamic probability value generated by a microscopic ice nucleus, constructing a recessive ice condition propagation path map, generating an icing warning curve, and realizing real-time grading judgment on the blade state; if it is judged that the freezing state is the hidden freezing state, local temperature rise control is triggered, and directional temperature control operation is executed on the corresponding heating units; the method has the high-time-efficiency hidden ice condition recognition and response capacity, and the operation safety and the intelligent level of the wind generating set in the cold region can be remarkably improved.

The embodiment of the present application relates to the field of ship ice prevention, and particularly relates to a ship driving window ice prevention method and system. The method comprises: capturing relative head-on airflow during ship navigation; performing acceleration processing on the relative head-on airflow to obtain accelerated airflow; spraying the accelerated airflow along the outer surface of the ship driving window according to a set ice prevention critical condition through an airflow spraying device to generate an attached air curtain on the outer surface; the ice prevention critical condition comprises: the speed of generating the attached air curtain is greater than or equal to an ice prevention standard value; the ice prevention standard value is the larger one of a first critical value and a second critical value; the first critical value is a critical value of airflow speed corresponding to the deflection of ice crystal particles, supercooled water droplets or initial ice nuclei under the action of the relative head-on airflow; and the second critical value is a critical value of airflow speed corresponding to the destruction of the adhesion of ice crystal particles, supercooled water droplets or initial ice nuclei.

The invention discloses a protection type ice crystal sampling device based on a cloud chamber and an automatic control system, and relates to the technical field of ice crystal sampling detection. A glass slide storage and pushing module is used for pushing a lowermost glass slide assembly into a glass slide protection module, the glass slide protection module conveys the glass slide assembly into a cloud chamber through a belt conveying module and then collects ice crystals, and the belt conveying module is arranged between the cloud chamber and a constant temperature box in a penetrating mode. One side of the belt conveying module is connected with the ice nucleus detection module, the other side of the belt conveying module is connected with the glass slide pushing mechanism, the glass slide pushing mechanism is used for pushing the glass slide assembly after ice crystal sampling is completed to the ice nucleus detection module, and after ice crystal observation is completed, the glass slide pushing mechanism pushes the glass slide assembly to the guide plate. According to the invention, a highly modularized design is adopted, maintenance and upgrading are facilitated, and the flexibility and expandability of the system are improved, so that the whole device can be rapidly adjusted and optimized according to different experiment requirements.

This invention relates to the field of air coolers, specifically disclosing a laser surface texture processing method for defrosting the surface of air cooler fins. The method involves sequentially grinding and mechanically polishing a 6061 aluminum alloy fin substrate to remove the surface oxide layer and metal debris, followed by ultrasonic cleaning with anhydrous ethanol for 20 minutes and cold air drying to obtain a pre-treated substrate. A nanosecond laser processing system is used to programmatically scan the surface of the pre-treated substrate to prepare a continuously and regularly arranged hexagonal honeycomb micron-level texture. This hexagonal honeycomb micron-level texture includes micron-level raised platforms and recessed grooves, which are interconnected to form a microchannel network. This method can construct specific multi-level micro-nano textures on the fin surface, effectively reducing the contact area between ice nuclei and the substrate, delaying frost formation, significantly extending the defrosting cycle of the air cooler, and reducing the frequency of defrosting operations to lower overall energy consumption. The microchannel network formed by the texture allows for rapid drainage of defrost water, avoiding secondary frost problems caused by residual defrost water.

The invention provides a method for calculating the maximum diffusion height of a catalyst based on the optimal number concentration of an ice nucleus in cloud. The method comprises the following steps: establishing a diffusion calculation coordinate system; constructing a wind field model for describing the distribution of horizontal wind speed and vertical airflow along with height, and deducing a lifting track of a smoke plume center line along with the change of a downwind distance; establishing an analytic model for describing the concentration distribution of the catalyst in a three-dimensional space under the coordinate system; simplifying the concentration distribution analysis model, and solving to obtain a prediction height based on a concentration dilution criterion; based on a vertical airflow velocity distribution model in the wind field model and a preset vertical airflow attenuation threshold, solving to obtain a critical height based on the power lifting capability limit; the minimum value of the predicted height and the critical height is taken as the maximum height of catalyst diffusion, the vertical airflow lifting effect can be comprehensively considered, calculation is easy, convenient and rapid, and the problems that an existing model is large in prediction deviation due to neglecting of vertical airflow and poor in practicability due to calculation complexity are solved.