论文部分内容阅读
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 the wide application of large bypass ratio engine in modern passenger aircraft, fan noise has become more and more prominent in the overall noise of the engine. Therefore, the prediction and assessment of fan noise is essential to the airworthiness certification and new aeroengine Noise reduction design is of great importance. This paper studies the mechanism of noise generation and the environmental conditions that affect the noise propagation in the civil aviation engine fan parts. According to the research results, the MATLAB programming is used to establish the model of the approach noise of the aeroengine fan parts. The model is used to predict the noise Effectively feel the noise level. By comparing the actual data of predicted values, the algorithm of predicting the noise of aero-engine fan components based on the static noise prediction of aero-engine fan components can be used to predict the actual situation better.