并联TBCC排气系统模态转换过程动态特性研究  

Study on Dynamic Characteristics of Modal Transition Process of Parallel TBCC Exhaust System

作　　者：彭波 徐惊雷[1] PENG Bo;XU Jinglei(College of Energy and Power,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《机械制造与自动化》2022年第5期194-198,共5页Machine Building & Automation

摘　　要：为探究超燃冲压发动机并联TBCC排气系统在模态转换过程中的动态特性,对某卧式布局并联TBCC排气系统及飞行器后体开展模态转换过程的非定常数值模拟,获得多个典型时刻的排气系统瞬时流场结构和模态转换过程排气系统气动性能的动态变化规律。结果表明:模态转换过程中,排气系统流场结构复杂,涡轮、冲压和外流三股射流的相互耦合明显;几何调节机构影响了排气系统的轴向阻力和气流膨胀程度,对排气系统气动性能的影响很大;所设计的排气系统气动性能变化稳定,满足飞行器的稳定飞行和良好控制要求。To explore the dynamic characteristics of the scramjet parallel TBCC exhaust system inthe modal transition process, the unsteady numerical simulation of a horizontal layout parallel TBCC exhaust system and the aircraft afterbody modal transition process was carried out to abtainthe transient flow field structure of the exhaust system at several typical times and the dynamic variation law of the aerodynamic performance of the exhaust system during the modal transition process. The results show that the flow field structure of the exhaust system is complex in the modal transitionprocess, and the interaction of turbine, ram and outflow jets is obvious. The geometric adjustment mechanism has effect on the axial resistance and air expansion degree of the exhaust system, which has a great influence over the aerodynamic performance of the exhaust system. The aerodynamic performance of the designed exhaust system changes stably and meets the requirements of stable flight and good control of aircraft.

关 键 词：超燃冲压发动机 并联TBCC 模态转换 动态特性 非定常数值模拟 内外流耦合 

分 类 号：V236[航空宇航科学与技术—航空宇航推进理论与工程]