航空发动机压气机内气液非平衡冷却特性研究  

Gas-Liquid Non-Equilibrium Cooling Characteristics of Aero-Engine Compressor

作　　者：林阿强 郑群[3] 夏全忠 杨璐 刘高文[1,2] LIN A-qiang;ZHENG Qun;XIA Quan-zhong;YANG Lu;LIU Gao-wen(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710129,China;Shaanxi Key Laboratory of Thermal Science in Aero-Engine System,Northwestern Polytechnical University,Xi’an 710072,China;College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China;Science and Technology on Altitude Simulation Laboratory,AECC Sichuan Gas Turbine Establishment,Mianyang 621000,China)

机构地区：[1]西北工业大学动力与能源学院,陕西西安710129 [2]西北工业大学陕西省航空动力系统热科学重点实验室,陕西西安710072 [3]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001 [4]中国航发四川燃气涡轮研究院高空模拟技术重点实验室,四川绵阳621000

出　　处：《推进技术》2021年第8期1776-1785,共10页Journal of Propulsion Technology

基　　金：中央高校基本科研业务费专项资金(3102021OQD701);国家科技重大专项基金(2017-I-0009-0010,2017-II0006-0019)。

摘　　要：针对航空涡轮发动机来流雾化冷却对压气机内气动脉动的影响,考虑壁面液膜成形和运动,基于欧拉-拉格朗日多相流方法解析气液两相热质非平衡传输过程,应用快速傅里叶变换方法将压气机性能参数随旋转周期演变规律的时域脉动敏感性转化为频域功率谱密度的直观分析。结果表明,压气机内气液非平衡蒸发相变易诱发流场在时间和空间上非定常的气动脉动,雾化冷却参数与总温比呈线性关系,而与总压比和效率均呈非线性关系。在雾化量0.5%~5%和雾化平均粒径1~9μm内,较低的雾化量或较小的雾化平均粒径时,时域总压比的脉动程度更大;在较低的雾化量或较大雾化平均粒径时,时域总温比的脉动程度更强;而在较高的雾化量或较大的雾化平均粒径时,时域效率脉动程度更高。同时,雾化冷却量变化对湿压缩过程中流场的时域脉动敏感性程度大于雾化粒径变化。Given the influence of the atomization cooling of the incoming flow of the aero-turbine engine on the internal airflow of the compressor,the non-equilibrium transmission process of gas-liquid two-phase on heat and mass transfer is analyzed based on the Eulerian-Lagrangian multiphase flow method.And then,the motion factor of the liquid film on the wall is considered.Moreover,the time-domain fluctuation sensitivity of the charac⁃teristic parameters of the compressor is transformed into an analysis of the frequency-domain power spectral den⁃sity by the Fast Fourier Transform(FFT)method.Results show that the non-equilibrium evaporation phase tran⁃sition in the compressor can easily induce the unsteady aerodynamic fluctuation of the flow field in time and space.The atomization cooling parameters have a linear relationship with the total temperature ratio and a nonlin⁃ear relationship with both total-pressure ratio and efficiency.In the range of 0.5%~5%water/air ratio and 1~9μm mist particle mean size,the fluctuation degree of total-pressure ratio in the time domain is higher when wa⁃ter/air ratio is lower or mist particle mean size is smaller.The fluctuation degree of total-temperature ratio in the time domain is stronger when the water/air ratio is lower or atomization particle mean size is larger.The fluctua⁃tion degree of efficiency in the time domain is higher when water/air ratio is higher or mist particle mean size is larger.Simultaneously,the sensitivity of the change of water/air ratio to the time domain fluctuation of flow field during the wet compressor is greater than that of mist particle size.

关 键 词：航空涡轮发动机 压气机 雾化冷却 相变蒸发 非定常脉动 快速傅里叶变换 功率谱密度 

分 类 号：V233[航空宇航科学与技术—航空宇航推进理论与工程]