超声速民机机动飞行的聚焦声爆全场预测方法研究  

Method of Full-field Focused Boom Prediction for Civil Supersonic Transport in Maneuvers

作　　者：范杰 韩忠华[1,2,3] 乔建领 陈晴 杨瀚 宋文萍 FAN Jie;HAN Zhonghua;QIAO Jianling;CHEN Qing;YANG Han;SONG Wenping(School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China;Research Center for Environment-friendly Supersonic Civil Transports(ReCESST)/Institute of Aerodynamic and Multidisciplinary Design Optimization,Northwestern Polytechnical University,Xi’an 710072,China;National Key Laboratory of Aircraft Configuration Design,Xi’an 710072,China)

机构地区：[1]西北工业大学航空学院,西安710072 [2]西北工业大学环保型超声速客机研究中心/气动与多学科优化设计研究所,西安710072 [3]飞行器基础布局全国重点实验室,西安710072

出　　处：《宇航学报》2024年第10期1538-1551,共14页Journal of Astronautics

基　　金：国家自然科学基金(12072285)。

摘　　要：超声速民机在加速、俯冲等机动飞行阶段会产生强烈的聚焦声爆,其全场预测方法是当前国际上研究的热点和难点之一。由于目前无法承受全域非定常计算带来的成本,故而将聚焦声爆全场预测分为焦散计算和波形预测两部分,并在两部分之间迭代求解得到地面聚焦位置和声爆强度。首先,通过耦合求解机动飞行航迹和声射线传播路径,发展了迭代求交点和推进求包络线两类焦散计算方法。其次,在焦散计算和近场计算加中/远场传播之间迭代求得入射波形,作为求解广义Tricomi方程的输入,发展了一套聚焦声爆全场预测方法,并自主开发了预测程序FC-Boom。最后,采用AIAA第三届声爆预测研讨会标模算例和美国SCAMP项目飞行试验算例,验证了全场预测方法和程序的正确性。该工作可作为聚焦声爆抑制和低聚焦声爆设计的基础。Supersonic civil aircraft will produce intense focused sonic booms during maneuvering flight phases such as acceleration and dive.The full-field prediction method for this is one of the current research hotspots and difficulties internationally.As the cost brought by the full-domain unsteady calculation is currently unaffordable,the full-field prediction of focused sonic booms is divided into caustic calculation and waveform prediction,and the ground focusing position and sonic boom intensity are obtained through iterative solution between the two parts.Firstly,by coupling the solutions of the maneuvering flight trajectory and the propagation path of sound rays,two types of caustic calculation methods,namely the iterative intersection point method and the forward envelope line calculation method,have been developed.Secondly,the incident waveform is iteratively obtained between the caustic calculation and the near-field calculation plus the middle/far-field propagation,which serves as the input for solving the lossy nonlinear Tricomi equation.A set of full-field prediction methods for focused sonic booms has been developed,and an independent prediction program“FC-Boom”has also been developed.Finally,the correctness of the full-field prediction method and the program is verified by using the benchmark example of the Third AIAA Sonic Boom Prediction Workshop and the flight test example of the US SCAMP project.This work can serve as the basis for the suppression of focused sonic booms and the design of low-focused sonic booms.

关 键 词：超声速民机 机动飞行 聚焦声爆 焦散计算 广义Tricomi方程 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]