C919飞机减推力飞越噪声级预测算法研究

Study on Prediction Algorithm of the Flyover Noise Level of the C919 Aircraft on Cutback Thrust

为了在新设计飞机首飞测试前能够预测飞机减推力飞越噪声级,节省人员物力的消耗,缩短新设计飞机的设计周期,对飞机减推力有效感觉噪声级预测方法进行研究;利用飞机的相关控制参数和有效感觉噪声级公式推导了减推力飞越噪声级的预测方法;以空客、波音飞机为例,验证预测方法的有效性;并将该算法应用在国产C919飞机飞越噪声级的预测中。

In order to reduce the period of new aircraft design and save the consumption of resources, the prediction algorithm of the flyover noise level of the aircraft on cutback thrust is studied. The related control parameters and the effective perceived noise level (EPNL) formula is used to establish the prediction algorithm of the flyover noise level of the aircrafts on cutback thrust. With the Airbus and Boeing series aircrafts as examples, the validity of the algorithm is verified.Finally, the algorithm is applied to the prediction of the flyover noise level of the domestic C919 aircrafts.