| Citation: | FENG Shuang, LI Baokuan, YANG Xiaoxi, et al. Effect of nozzle structure and jet parameters on the temperature characteristics of mass injection and pre-compressor cooling[J]. Journal of Aerospace Power, 2024, 39（5）：20210566 doi: 10.13224/j.cnki.jasp.20210566
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Excessive high intake temperature is one of the key problems limiting the performance of aero-engines, mass injection and pre-compressor cooling (MIPCC) technology can effectively reduce the intake temperature of aero-engine. In order to investigate the influence of MIPCC technology on the temperature field in the inlet, a mathematical model of the droplet atomization and evaporation process was established. Based on Euler-Lagrange method, the mathematical model was used to realize the two-way coupling of the gas-liquid two-phase and describe the MIPCC process in the intake port of an aero-engine. Compared with the existing test results, the accuracy of the mathematical model was verified. The effects of water-air ratio, injection velocity, particle diameter and nozzle cone angle on the cooling effect and temperature distribution of the inlet were studied by using the mathematical model. The results showed that when the water-air ratio increased from 0.02 to 0.055, the cooling ratio increased from 8.10% to 19.87%, and the evaporation rate decreased from 85.76% to 79.80%; when the water-air ratio was 0.055, the injection velocity was 10 m/s, the droplet size was 25 μm and the nozzle cone angle was 15°, the maximum temperature drop coefficient was 22.77%. Increasing the nozzle cone angle and decreasing the injection velocity made the temperature field distribution in the outlet section of the inlet more uniform.
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