Inverse design of low boom configurations using proper orthogonal decomposition and augmented Burgers equation

作     者：Yidian ZHANG Jiangtao HUANG Zhenghong GAO Chao WANG Bowen SHU 

作者机构：School of AeronauticsNorthwestern Polytechnical UniversityXi’an 710072China Computational Aerodynamics InstituteChina Aerodynamics Research and Development CenterMianyang 621000China 

基　　金：The author thanks Miss Siyi LI for her early work on POD and enlightening discussions with her 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2019年第32卷第6期

页      码：1380-1389页

摘      要：Mitigation of sonic boom to an acceptable stage is a key point for the next generation of supersonic transports. Meanwhile, designing a supersonic aircraft with an ideal ground signature is always the focus of research on sonic boom reduction. This paper presents an inverse design approach to optimize the near-field signature of an aircraft, making it close to the shaped ideal ground signature after the propagation in the atmosphere. Using the Proper Orthogonal Decomposition(POD) method, a guessed input of augmented Burgers equation is inversely achieved. By multiple POD iterations, the guessed ground signatures successively approach the target ground signature until the convergence criteria is reached. Finally, the corresponding equivalent area distribution is calculated from the optimal near-field signature through the classical Whitham F-function theory. To validate this method, an optimization example of Lockheed Martin 1021 is demonstrated. The modified configuration has a fully shaped ground signature and achieves a drop of perceived loudness by 7.94 PLdB. This improvement is achieved via shaping the original near-field signature into wiggles and damping it by atmospheric attenuation. At last, a nonphysical ground signature is set as the target to test the robustness of this inverse design method and shows that this method is robust enough for various inputs.

主 题 词：Aeroacoustics Augmented Burgers equation Low boom configuration Optimization Supersonic aerodynamics 

学科分类：080103[080103] 08[工学] 080104[080104] 0801[工学-力学类] 

核心收录：

D　O　I：10.1016/j.cja.2019.03.017

馆 藏 号：203679401...