航空空气减压器位移-压力特性及影响因素研究

Displacement-Pressure Characteristics and Influence Factors' Analysis of Air Pressure Reducer

为了分析空气减压器结构参数的变化对空气减压器位移-压力特性的影响,采用基于计算流体力学的计算机仿真方法对空气减压器的位移-压力特性进行研究,得到了不同的结构参数下的空气减压器的位移-压力特性曲线。对这些位移-压力特性曲线进行对比分析,结果表明:气针上、下游角度,气针最大直径,小孔直径以及气针通道入口处圆弧半径等结构参数中,气针的下游角度和最大直径对空气减压器特性的影响较为显著。通过修改气针下游角度和最大直径,能够尽可能地调整空气减压器的特性,以满足指标要求。

By using the computer simulation method based on computational fluid dynamics, this paper researched the influence of different structure parameters for the displacement-pressure characteristics of the air pressure reduc- er. The displacement-pressure characteristic curves of different structure parameters were achieved. Comparing these curves, it implies that, the downstream angle and the maximum diameter play a critical role in the characteristics of the air pressure reducer among the upstream angle, the downstream angle, the maximum diameter, the hole diame-ter and the arc radius at the passage entrance, etc. By modifying the downstream angle and the maximum diameter properly, the characteristics of the air pressure reducer can be adjusted to meet the index demand as well as possible.