MEANLINE MODELING OF RADIAL INFLOW TURBINE WITH VARIABLE AREA NOZZLE

被引：0
|
作者：
Qiu, Xuwen [1 ]
Anderson, Mark R. [1 ]
Baines, Nicholas C.
机构：
[1] Concepts NREC, White River Jct, VT 05001 USA
来源：
PROCEEDINGS OF ASME TURBO EXPO 2009, VOL 7, PTS A AND B | 2009年
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D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A meanline model of a radial inflow turbine with a variable geometry nozzle is presented. The existence of a clearance gap in a variable geometry nozzle presents a significant challenge in the prediction of turbine performance. First, the nozzle clearance carries a portion of the flow that is not turned by the nozzle vanes. The amount of flow in the clearance region is related to the size of the clearance as well as the nozzle setting angle or the throat area. This under-turned flow influences the power output and turbine efficiency. Furthermore, the maximum flow rate that is allowed to pass the nozzle is increased because of the presence of the clearance, altering the turbine map in turbine operation.
引用
收藏
页码：1185 / 1191
页数：7
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