带周向槽机匣处理的离心压气机扩稳机理分析

高鹏; 楚武利; 吴艳辉; 邓文剑

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带周向槽机匣处理的离心压气机扩稳机理分析
高鹏¹, 楚武利², 吴艳辉³, 邓文剑⁴
1.西北工业大学动力与能源学院陕西西安710072;2.西北工业大学动力与能源学院陕西西安710073;3.西北工业大学动力与能源学院陕西西安710074;4.西北工业大学动力与能源学院陕西西安710075

摘要:

机匣处理能够改善压气机稳定裕度,扩大其稳定工作范围。通过对带周向槽机匣处理的NASA低速离心叶轮(LSCC)进行了时间精确的全三维数值模拟,并对周向槽机匣结构和实壁机匣结构在近失速流量点工况下的计算结果进行了比较分析。分析结果表明,周向槽处理机匣对叶顶间隙泄漏涡的抑制是周向槽机匣处理扩稳的主要原因。

关键词: 压气机周向槽机匣处理+ 顶部间隙泄漏涡+

DOI：

分类号:V231.3

基金项目:

Mechanism of stall margin improvement in a centrifugal compressor with circumferential grooves casing treatment

GAO Peng¹, CHU Wu-li², WU Yan-hui³, DENG Wen-jian⁴

1.School Power and Energy,Northwestern Polytechnical Univ.,Xi’an 710072,China;2.School Power and Energy,Northwestern Polytechnical Univ.,Xi’an 710073,China;3.School Power and Energy,Northwestern Polytechnical Univ.,Xi’an 710074,China;4.School Power and Energy,Northwestern Polytechnical Univ.,Xi’an 710075,China

Abstract:

To study the mechanism of stall margin improvement,a time accurate 3-dimentional numerical simulation is performed for a low speed centrifugal compressor with the circumferential grooves casing treatment.The computational results with the mass flow rate of 13 kg/s have been compared between the two different cases with the circumferential grooves and with untreated smooth wall.It is because the development of tip leakage vortex is restrained that the circumferential grooves can extend stall margin.

Key words: Compressor Circumferential grooves casing treatment+ Tip leakage vortex