空气动力学学报2019，Vol.37Issue(4)：663-674,12.DOI:10.7638/kqdlxxb-2018.0267
基于广义Burgers方程的超声速客机远场声爆高精度预测方法
Sonic boom prediction method for supersonic transports based on augmented Burgers equation
摘要
Abstract
The high-fidelity sonic-boom prediction is crucial for the design of low-boom supersonic transport aircraft.In this article,a far-field sonic-boom prediction method solving the augmented Burgers equation is studied,and a prediction code called "bBoom"is developed.First, the numerical method for solving augmented Burgers equation and a ray tracing method in propagation are studied.Some significant parameters of molecular relaxation processes and thermoviscous absorption in the Burgers equation are presented.Second,some benchmark cases from the 2th AIAA Sonic Boom Prediction Workshop,including a simple axi-symmetric body,a NASA low-boom configuration,and LM1 0 2 1 configuration,are employed to validate the code. The results show that the developed code is accurate and reliable for predicting the far-field waveforms. At last,far-field sonic boom waveforms propagated from different near-field pressure signals at different locations are compared, and the distinction of waveforms in different flight azimuthal angles with atmospheric winds is investigated.It is shown that,in order to improve the accuracy of predicting the sonic boom for configurations like a C25D model,the near-field signal should be extracted at a distance of three body lengths off the aircraft.It is also shown that atmospheric wind profiles have a significant impact on the sonic-boom waveform and sonic-boom carpet on the ground.关键词
超声速客机/声爆预测/广义Burgers方程/声射线方法/大气风Key words
supersonic transport/sonic boom prediction/augmented Burgers equation/ray tracing/atmospheric wind profiles分类
航空航天引用本文复制引用
乔建领,韩忠华,丁玉临,池江波,孟冠宇,宋笔锋,宋文萍..基于广义Burgers方程的超声速客机远场声爆高精度预测方法[J].空气动力学学报,2019,37(4):663-674,12.基金项目
国家自然科学基金(11772261) （11772261）
航空科学基金(2016ZA5301 1) （2016ZA5301 1）
CFD前沿技术项目(2015-F-016) （2015-F-016）
