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为分析进气畸变对发动机稳定性和性能影响,基于带源项的2维非定常欧拉方程发展了1种数值计算方法。利用所建立的模型针对某型发动机分析了总压畸变对整机稳定性和性能参数的影响,以及典型影响因素对临界总压畸变指数的影响。计算结果表明:该模型预测较准确,预测结果具有工程应用价值。
In order to analyze the influence of intake air distortion on engine stability and performance, a numerical method based on 2-dimensional unsteady Euler equations with source terms was developed. The influence of the total pressure distortion on the whole machine stability and performance parameters and the influence of the typical influencing factors on the critical total pressure distortion index are analyzed with the established model for a certain type of engine. The calculation results show that the model predicts more accurately and the prediction result has engineering application value.