Thermal compensation method for combustion chamber of rapid compressor

Abstract

According to a thermal compensation method for a combustion chamber of a rapid compressor disclosed by the invention, under the condition of no thermal compensation, the heat dissipation model is used for obtaining a predicted value of a pressure decline curve caused by heat dissipation and mass transfer of the combustion chamber within a set time range, and the predicted value of the model is compared with a pressure curve measured value obtained by an experiment; model prediction and experimental measurement results are made to be the same by adjusting heat exchange coefficients, the number of calculation units and time steps of combustion chamber calculation units in the heat dissipation model, then adjusted parameters are input into the model to operate under the thermal compensation condition, and a piston motion curve needed by thermal compensation under the working condition is obtained. The piston movement speed of the rapid compressor is controlled according to the obtained piston movement speed curve, and the purpose of heat dissipating capacity compensation of a core area of a combustion chamber is achieved; according to the method, the heat loss of the combustion chamber of the rapid compressor is reduced, the maintaining time of a high-temperature and high-pressure environment is prolonged, and a more ideal thermodynamic environment is provided for research of the fuel oxidation ignition dynamics process.

Description

technical field [0001] The invention relates to the technical field of a rapid compressor for a combustion chemical reaction kinetics experimental device, in particular to a method for thermal compensation of a combustion chamber of a rapid compressor. Background technique [0002] The rapid compressor drives the rapid compression of the piston to rapidly reduce the volume of the combustion chamber, thereby realizing the rapid loading of the high-temperature and high-pressure thermodynamic environment in the combustion chamber, which can be used to test the autoignition and oxidative decomposition characteristics of fuels at specific temperatures and pressures. However, due to the inevitable heat dissipation in actual use, usually when the piston stops moving, the temperature and pressure in the combustion chamber will begin to drop. Due to different geometric structures and operating parameters of different fast compressor test benches, the degree to which the experimental ...

AI Technical Summary

Problems solved by technology

However, due to the inevitable heat dissipation in actual use, usually when the piston stops moving, the temperature and pressure in the combustion chamber will begin to drop

Due to different geometric structures and operating parameters of different fast compressor test benches, the degree to which the experimental process is affected by heat loss is also significantly different. The development of the model adversely affects the

Images