民用航空发动机燃烧室噪声预测

民用航空发动机燃烧室作为飞机的主要噪声源，其噪声大小不仅影响飞机适航取证，而且反映燃烧室的燃烧品质。因此，在设计之初对发动机燃烧室噪声进行精准预测便显得极为重要。通过对民用航空发动机燃烧室在地面和空中的噪声产生机理和主要影响因素进行研究，根据研究结果结合MATLAB GUI进行编程，建立民用航空发动机燃烧室噪声预测模型。利用该模型预测发动机燃烧室的声压级、总声压级、A计权声压级和感觉噪声级等噪声参数。

Noise Prediction of Civil Airplane Engine Combustor

Civil airplane engine combustor is one of the main noise sources of aircrafts. The noise from the combustor is a reflection of burning quality, which may lead to losing the airworthiness certification. Therefore, it is vitally important to have an accurate prediction of combustor＇ s noise at the beginning of engine design. In this paper, mechanism of noise generation and the main influencing factors of the combustor were studied. A model for noise prediction of the combustor was established and a program by MATLAB GUI code was written for analyzing the model. Some noise parameters such as SPL, OASPL, dBA, PNDB, etc. were predicted.