反推状态下大涵道比涡扇发动机气动稳定性预测与评估
收稿日期: 2016-03-07
修回日期: 2016-05-06
网络出版日期: 2016-05-23
基金资助
中国博士后科学基金（2014M551590）
Prediction and evaluation of aerodynamic stability of high bypass ratio turbofan engine deployed with thrust reverser
Received date: 2016-03-07
Revised date: 2016-05-06
Online published: 2016-05-23
Supported by
China Postdoctoral Science Foundation (2014M551590)
为了预测与评估反推状态下，反推气流再吸入对大涵道比涡扇发动机气动稳定性的影响，采用反推气流扰流流场三维CFD数值模拟、发动机整机稳定性计算分析以及反推状态下发动机进气畸变台架试验相结合的方法，开展了反推气流对大涵道比涡扇发动机气动稳定性影响的研究。通过三维CFD数值模拟手段，捕获了反推状态下发动机进口流场的畸变程度。在此基础上，通过采用稳定性计算程序预测了发动机的气动稳定性，并进一步通过发动机台架试验，验证了预测结果。CFD计算结果表明，随着相对来流马赫数的减小，反推气流被发动机重新吸入的可能性不断增大，当相对来流马赫数减小到0.05时，外侧发动机进口的流场畸变情况变得最为严重。进气畸变情况下的整机稳定性计算分析以及发动机台架试验结果表明，在所考核的目标状态，若只存在因反推气流再吸入引起的进口流场畸变，是不会导致发动机失稳的。
王志强 , 沈锡钢 , 胡骏 . 反推状态下大涵道比涡扇发动机气动稳定性预测与评估[J]. 航空学报, 2017 , 38(2) : 120192 -120202 . DOI: 10.7527/S1000-6893.2016.0143
Three-dimensional CFD numerical simulation, engine stability calculation and bench test of engine inlet distortion are combined to predict and assess the influence of re-ingestion of the reverser flow on the aerodynamic stability of the high bypass ratio turbofan engine when the thrust reverser is deployed. By means of three-dimensional CFD numerical simulation, the distortion degree of the engine inlet flow field is acquired. On this basis, the aerodynamic stability of the engine is predicted by the stability calculation program, and the prediction results are verified by the engine bench test. The CFD calculation results show that, with the decrease of the relative flow Mach number, the possibility of re-ingestion of the reverser flow is increased, and the inlet flow field distortion of the outboard engine is the most serious when the relative flow Maher number decreases to 0.05. The results of stability calculation analysis and engine bench test in the inlet distortion situation show that, in the assessment of the target state, if the inlet distortion is only caused by the re-ingestion of the reverser flow, the engine will not be unstable.
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