进气加温模拟装置对涡扇发动机进气流场稳定性影响试验

Experimental Study on the Influence of Inlet Heating Simulator on the Stability of Inlet Flow Field of Turbofan Engine

为分析新设计的进气加温模拟装置对涡扇发动机进气流场稳定性的影响,对试验设备、测试方案、进气流场的稳定性评估方法和试验方案进行设计研究。通过开展气源供气温度、供气流量和发动机状态多因素匹配工况下涡扇发动机与进气加温模拟装置的联合试验,确定发动机进口气流稳定性指标的最高值。对不同试验工况数据进行计算分析,结果表明:进气加温模拟的稳压进气道对发动机进口压力场影响较小,发动机状态稳定时进口温度场只有1个高温区,T_(1)升高以及发动机状态提高,温度场及压力场不稳定性增大,多工况下发动机温场周向不均匀度最大为0.6907%,压力场周向畸变指数最大为0.0187%。进气加温模拟装置条件下,发动机压力场和温度场稳定性情况满足发动机试验要求,可为后续开展发动机进气加温试验提供参考。

In order to study the influence of the newly designed inlet heating simulator on the inlet flow field stability of a turbofan en-gine,the test equipment,instrumentation scheme,inlet flow field stability evaluation method and test scheme were designed and studied.By conducting joint tests of the turbofan engine and the intake heating simulator under the condition of multi-factor matching of air supply temperature,air supply flow rate and engine state,the maximum value of the engine inlet airflow stability index was determined.Through calculation and analysis of the data under different test conditions,the results show that the stabilized inlet of the inlet heating simulator has little influence on the pressure field at the inlet of the engine.When the engine is stable,there is only one high-temperature zone in the inlet temperature field.The instability of the temperature field and pressure field increases with the increase of T_(1) and the increase of en-gine state.The maximum circumferential temperature distortion is 0.6907%,and the maximum circumferential pressure distortion index is 0.0187%.The stability of the engine pressure field and temperature field meet the requirements of the engine test under the condition of in-let heating simulator,which can provide a reference for subsequent engine inlet heating tests.