轴对称紊流发生器主要几何参数对紊流度的影响

The Main Geometric Parameter Effects on the Turbulence for the Axisymmetric of Turbulence Generator

关键词:  紊流度  流场畸变  模拟试验  发动机进气道

Key words:  Turbulence  Flow distortion  Simulation test  Intake of engine

摘要:

本文分析比较了轴对称紊流发生器的主要几何参数对紊流度的影响.试验表明,采用适当的面积比,较小的扩张角和收缩比,较短的相对长度,在M₂=0.4～0.6的范围内,能获得较高的紊流度.如当M₂=0.5时,紊流度可达0.076,总压恢复系数为0.74.

Abstract:

The paper describes the main geometric parameter effects on the turbulence for the axisymmetric type of turbulence generator. The experiments show that the higher turbulence is reached in M2 = 0.4-0.6 when the smaller divergence angle, smaller convergence ratio, smaller relative length and suitable area ratio are adopted. For example when M2 = 0.5 the turbulence equals 0.076 and the total pressure recovery efficiency 0.74.