TBCC进气道涡轮通道扩张段设计及涡轮模态特性  

Design of turbo diffuser for TBCC inlet based on characteristics of turbo mode

作　　者：张华军[1,2] 刘兴国[2] 郭荣伟[1] 谢旅荣[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016 [2]中国人民解放军驻四二0厂军事代表室,成都610503

出　　处：《航空动力学报》2014年第1期181-191,共11页Journal of Aerospace Power

基　　金：国家高技术研究发展计划(2009AA7050303)

摘　　要：采用拓展中心线、不同的流通截面面积变化规律和倒圆半径变化规律对内并联型TBCC（turbine based combined cycle engine）进气道涡轮通道扩张段进行了设计．通过数值模拟的手段，对涡轮通道扩张段设计参数的影响规律和涡轮模态下涡轮通道扩张段的气动特性进行了研究，并利用高速风洞试验结果对数值模拟方法进行了验证．研究结果表明：中心线控制点纵坐标在1．50～2．25、涡轮通道扩张段出口等直段长度与出口直径比值在0．3～0．7的范围内取值时，涡轮通道扩张段可获得较高的出口总压恢复系数和较小的出口总压畸变指数；采用前急后缓的流通截面面积和倒圆半径变化规律能使涡轮通道扩张段获得较小的出口总压畸变指数；随着飞行马赫数的增加，进气道和涡轮通道扩张段的流量系数先不断减小，在飞行马赫数为0．9附近达到最小，之后又逐渐增加，涡轮通道扩张段出口总压恢复系数不断升高，在飞行马赫数为0．7附近达到最大，之后又逐渐降低；涡轮模态下，涡轮通道扩张段出口总压畸变指数均小于0．5，能很好地满足涡轮发动机对进口流场的要求．Turbo diffuser for over/under type TBCC （turbine based combined cycle engine） inlet was designed with extended center line under different flow section area variation laws and blend radius variation laws. The influence of design parameters on the turbo diffuser and its aerodynamic characteristics in turbo mode were investigated by numerical simula- tion. High speed wind tunnel experiments were carried out to validate the numerical simulation method. Results indicate that turbo diffuser obtains high total pressure recovery coefficient and low total pressure distortion index at outlet when the ordinate of center line control point is within 1.50--2.25 and the ratio of constant area section length of turbo diffuser to exit radius is within 0.3-0.7. Both the flow section area and blend radius variation laws in a ＂first quick, then slow＂ manner contribute to a low total pressure distortion index at outlet of turbo diffuser. With the increase of flight Mach number, mass flow coefficients of both inlet and turbo diffuser firstly decrease until reaching its lowest point at flight Mach number of 0.9, then increase subsequently. Total pressure recovery coefficient at outlet of turbo diffuser firstly increase then decrease and the peak comes around at flight Mach number of 0.7. The total pressure distortion index at outlet of turbo diffuser is less than 0.5 for turbo mode and it satisfies the requirements of turbo engine for the flow quality at the entrance section.

关 键 词：组合发动机 内并联布局 进气道 涡轮通道扩张段 涡轮模态 TBCC 风洞试验 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]