飞机起落架气动噪声数值研究  

Numerical Research on Aeroacoustics of Aircraft Landing Gear

作　　者：张凯宁[1] 谢凝 曹平宽[1] 候银珠 ZHANG Kai-ning;XIE Ning;CAO Ping-kuan;HOU Yin-zhu(Xi′an Aeronautics Computing Technique Research Institute,AVIC,Xi′an 710068,China;Northwestern Polytechnical University,Xi′an 710072,China;AVIC the First Aircraft Institute,Xi′an 710089,China)

机构地区：[1]航空工业西安航空计算技术研究所,陕西西安710068 [2]西北工业大学,陕西西安710072 [3]航空工业第一飞机设计研究院,陕西西安710089

出　　处：《航空计算技术》2019年第5期63-66,共4页Aeronautical Computing Technique

摘　　要：针对某型民用飞机前起落架进行气动噪声数值仿真分析,研究了基于脱体涡DES模拟非定常流场的方法,计算起落架周围非定常湍流流场,提取声源信息,利用FW-H方程积分外推法求解模型辐射的声场,得到气动噪声的功率谱密度、总声压级等声学特征参数;并将研究的数值模拟方法应用于起落架复杂流场和气动噪声计算,研究结果为预测噪声起落架噪声设计提供了一定的参考。The numerical simulation of aeroacoustics on the front landing gear of a civil aircraft is carried out in this paper.Based on the method of unsteady simulation of DES,the flow field of the landing gear is numerically simulated.Then,the sound source information is extracted according to the flow field and the sound field of model radiation is solved by using FW-H equation integral extrapolation method.Hence the acoustic character parameters such as the power spectral density and the total sound pressure level of aeroacoustics are obtained.The method is applied to simulate the complex flow field and predict the aeroacoustics of the landing gear and the results show that the method can provide an effective reference for predicting the aeroacoustics design of landing gear.

关 键 词：起落架噪声 计算气动声学 非定常流场 DES FW-H 

分 类 号：V226[航空宇航科学与技术—飞行器设计]