Flow characteristics in a rotor-stator cavity with cooling air inlet at low radius

被引：0

作者：

CAI Xu ^{[1
,2
]}

LUO Xiang ^{[1
]}

ZHAO Xi ^{[3
]}

XU Guo-qiang ^{[1
]}

CAI Jun ^{[2
]}

机构：

[1] National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics,School of Energy and Power Engineering,Beijing University of Aeronautics and Astronautics

[2] Department of Information Network,Dalian Airforce Communicaiton Non-Commissioned Office Academy

来源：

航空动力学报 | 2015年 / 04期

关键词：

cooling system; rotor-stator system; flow characteristics; pressure distribution; resistance coefficient;

D O I：

10.13224/j.cnki.jasp.2015.04.002

中图分类号：

V231 [发动机原理];

学科分类号：

082502 ;

摘要：

Experiments were conducted on a typical rotor-stator system where air entered through an annular slot at low radius and flowed out of the cavity axially through a rim seal between the rotor and the stator.For the seal in this rotor-stator system,the stationary shroud overlapped the rotating one.Pressure distributions at the stator surface and flow resistance coefficients of the rotor-stator cavity with a maximum gap of 67mm were measured under different dimensionless mass flow rates from 1.32×104 to 4.87×104 with a large range of rotational Reynolds numbers from 0.418×106 to 2.484×106.The results show that pressure on the stator surface decreases with the increase of rotational Reynolds number when the dimensionless mass flow rate is below 1.3×104;when the dimensionless mass flow rate is above 3.034×104,the trend reverses.This is the so-called"pressure inversion effect".However,dimensionless pressure does not show the same changes when rotational dynamic pressure is chosen as the denominator.The resistance coefficient of the rotor-stator cavity is determined by the dimensionless mass flow rate and rotational Reynolds number;for practical application,the resistance coefficient can also be estimated by the turbulent flow parameter in the range of turbulent parameter from 0.1to 1.6.

引用

页码：775 / 783

页数：9

共 2 条

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