摘要
随着大涵道比发动机在现代客机上的广泛应用,风扇噪声在发动机整体噪声中所占比重越来越突出,因此,对风扇噪声进行预测评估对飞机的适航取证工作和新型航空发动机的降噪设计具有重要的意义。通过对民用航空发动机风扇部件的噪声产生机理和影响噪声传播的环境条件进行研究,根据研究结果进行MATLAB编程,建立航空发动机风扇部件进近噪声预测模型,利用该模型预测发动机风扇进近过程中的有效感觉噪声级。通过将预测数值实际数据进行对比,基于航空发动机风扇部件静态噪声预测进行动态修正后的航空发动机风扇部件进近噪声预测算法可以较好地预测实际情况。
With wide range of applications of high bypass ratio engine on the modern civil airliners, the proportion of fan noise in the total engine noise is becoming higher and higher. Therefore, it is of great significance to the worthiness certification of aircraft and development of new engines by predicting fan noise. In this paper, mechanism of fan noise and environment influences on noise propagation were studied. A model of fan noise prediction was established by MATLAB code and some noise parameters such as EPNL were predicted. Comparing prediction values with real data, aeroengine fan approach noise prediction method through modification of aeroengine fan static noise can well predict the real case.
作者
闫国华
马永康
陈佳栋
YAN Guohua MAYongkang CHEN Jiadong(Basic Experiment Center, Civil Aviation University of China, Tianjing 300300, China Sino-European Institute of Aviation Engineering, Civil Aviation University of China, Tianjing 300300, China)
出处
《航空科学技术》
2017年第10期45-49,共5页
Aeronautical Science & Technology
