Influence of Rain Ingestion on the Endwall Treatment in an Axial Flow Compressor

被引:9
|
作者
Li, Jichao [1 ]
Du, Juan [1 ]
Li, Mingzhen [2 ]
Lin, Feng [2 ]
Zhang, Hongwu [1 ]
Nie, Chaoqun [1 ]
机构
[1] Univ Chinese Acad Sci, CAS, Ind Gas Turbine Lab, Inst Engn Thermophys, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Key Lab Adv Energy & Power, Inst Engn Thermophys, Beijing 100190, Peoples R China
来源
JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME | 2018年 / 140卷 / 08期
基金
中国国家自然科学基金;
关键词
water ingestion; compressor; endwall treatment; stall margin improvement; efficiency; torque; STALL;
D O I
10.1115/1.4040550
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The effects of water ingestion on the performance of an axial flow compressor are experimentally studied with and without endwall treatment. The background to the work is derived from the assessment of airworthiness for an aero-engine. The stability-enhancing effects with endwall treatments under rain ingestion are not previously known. Moreover, all the endwall treatments are designed under thy air conditions in the compressor. Water ingestion at 3% and 5% relative to the design mass flow proposed in the airworthiness standard are applied to initially investigate the effects on the performance under smooth casing (SC). Results show that the water ingestions are mainly located near the casing wall after they move through the rotor blade row. The pressure rise coefficient increases, efficiency declines, and torque increases under the proposed water ingestion. The increase of the inlet water increases the thickness of the water film downstream the rotor blade row and aggravates the adverse effects on the performances. Subsequently, three endwall treatments, namely circumferential grooves, axial slots, and hybrid slots-grooves, are tested with and without water ingestion. Compared with no water ingestion, the circumferential grooves basically have no resistance to the water ingestion. The axial slots best prevent the drop of the pressure rise coefficient induced by water ingestion, and hybrid slots-grooves are the second-best place owing to the contribution of the front axial slots. Therefore, the hybrid slots-grooves can not only extend the stall margin with less efficiency penalty compared with axial slots, but also prevent rain ingestion from worsening the compressor performance.
引用
收藏
页数:13
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