论文部分内容阅读
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。
The intake air flow of the new embedded vents can not be measured in the traditional way. The three-dimensional calculation model of embedded vents was established by using computational fluid dynamics software Fluent. The influence of flight altitude and flight Mach number on the intake flow rate of buried vents was analyzed using a standard k-ε turbulence model. The results show that: (1) When the flight Mach number is constant, the height is higher and the intake air flow rate is less; the inlet air flow velocity is basically unchanged; the intake air volume of the buried vent is proportional to the density of the external atmosphere. (2) Ventilation intake air flow rate increased with the increase of flight Mach number, but the transonic flight intake air flow increased significantly, subsonic and supersonic flight intake flow increased slowly.