摘要
新型内埋式通风口的进气流量用传统方式无法测量。应用计算流体力学软件Fluent,建立了内埋式通风口的三维计算模型;采用标准k-ε湍流模型,分析了飞行高度和飞行马赫数变化对内埋式通风口进气流量的影响规律。结果表明:①飞行马赫数一定时,高度越高,进气流量越少;通风口进气流速基本不变;内埋式通风口进气量与外界大气的密流成正比。②通风口进气流量随飞行马赫数的增大而增加,但跨声速飞行时进气流量增幅较大,亚声速和超声速飞行时进气流量增加缓慢。
Mass flux of new embedded vent scoop cannot be measured in traditional way. Fluent was used to build three-dimensional numerical model of embedded vent scoop. And standard k -ε model was adopt- ed to analyze the influence of flight altitude and Mach number upon mass flux. The results show that mass flux becomes less as altitude gets higher if Mach number is fixed. Vice versa, it would increase with bigger Mach number. Mass flux increases faster in transonic flight but slower in subsonic and supersonic.
出处
《燃气涡轮试验与研究》
北大核心
2013年第2期46-49,共4页
Gas Turbine Experiment and Research
关键词
内埋式通风口
进气流量测量
飞行高度
冷却通风系统
embedded vent scoop
inlet mass flux measurement
flight altitude
cooling ventilation system
