Disk friction losses of closed turbomachine impellers

被引：77

作者：

Gülich, JF ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, LMH, CH-1007 Lausanne, Switzerland

来源：

FORSCHUNG IM INGENIEURWESEN-ENGINEERING RESEARCH | 2003年 / 68卷 / 02期

关键词：

Boundary conditions - Closed cycle machinery - Disks (machine components) - Friction - Laminar flow - Leakage (fluid) - Reynolds number - Surface roughness - Turbomachinery - Turbulent flow;

D O I：

10.1007/s10010-003-0111-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The power losses created by the shrouds of closed turbomachine impellers depends on Reynolds-number, surface roughness, rate and direction of leakage flow through the impeller side room and on the pre-swirl with which said leakage enters the side room. These parameters determine also fluid rotation between impeller and casing and axial thrust. While all of these effects have been treated in the literature, a generic procedure has been lacking, which would allow to predict, in a consistent and logical way, the impact of all of these boundary conditions on disk friction and fluid rotation. To fill this gap a method is presented and validated with test data. The formulae developed cover laminar, turbulent, smooth and rough flow regimes and ensure a smooth transition between these domains.

引用

页码：87 / 95

页数：9