摘要
喷气噪声是发动机主要噪声源之一,其大小直接影响到飞机的适航取证。由发动机静态噪声数据可以预测飞机飞行噪声级,提前了解飞机噪声的适航性,从而避免进行试验测量,达到节省时间和成本的目的。通过研究STONE喷气预测模型,提出民用航空涡扇发动机喷气噪声预测方法,并开发相应的Matlab预测程序。利用该程序预测C919客机主发的竞争发动机——CFM56-7B的喷气噪声,分析其噪声指向性以及频率特性,并与实验数据对比,验证此预测方法的准确性。
Jet noise is one of the main noise sources of engines, which directly affects the airworthiness certification of the aircraft. The data of static engine noise can predict the noise level and the airworthiness of the aircraft. So, it can save much time and costs. In this paper, based on the STONE jet prediction model, a method for prediction of jet noise of a civil aviation turbofan is proposed. A corresponding Matlab program is written and utilized to predict the jet noise of the engine CFM56- 7B, which is the competitive engine of aircraft C919. The accuracy of this method is verified by comparing the results with those of a real noise test.
作者
闫国华
邓波
YAN Guo-hua;DENG Bo(Sino-European Institute of Aviation Engineering, Civil Aviation University of China,Tianjin 300300, China)
出处
《噪声与振动控制》
CSCD
2016年第6期97-100,共4页
Noise and Vibration Control
关键词
声学
喷气噪声
噪声预测
涡扇发动机
静态测试
acoustics
jet noise
noise prediction
turbofan engine
static testing
