S弯扩压器内旋流的监测参数

 一、实验模型和设备 研究用的实验模型为一个带有进气导流段的矩形截面S弯扩压器（见图1）。进气导流段设有可更换部分,使导流段相对扩压器的角度在攻角方向由0°变为5°、10°、15°、30°、45°或60°,以改变扩压器进口截面的气流条件。导流段的进口采用了ρ=60sin2α的双纽线外形。模型设计及其详细的几何尺寸见文献1]。

MONITORING PARAMETERS OF SWIRLING FLOW IN S-SHAPED DIFFUSER

This paper presents three relations of the swirl coefficient of the flow in an S-shaped diffuser SC80 to parameters Vav, ΔCpbt1 and ΔCpbt2, respectively. Vav is the relative value of the average velocity of the flow at inlet section of the diffuser in vertical direction normalized by a reference velocity. ΔCpbt1 and ΔCpbt2 represent the differences of the static pressure coefficients between bottom and top walls at the inlet and at the end of the second bend of the diffuser. The analysis implies that the swirling flow in an S-shaped air intake could be monitored by a simple parameter.