总温畸变下跨声压气机失速过程非定常模拟

doi:10.7527/S1000-6893.2022.28319

Abstract

Abstract:

To investigate the stall mechanism of a transonic compressor with inlet total temperature distortion， full annular unsteady numerical simulations with a 500 K， 180° circumferential total temperature distortion are conducted on the German Darmstadt transonic compressor. The results indicate that the mass flow rate and the total pressure ratio decrease dramatically under the inlet total temperature distortion. The total pressure radial distribution varies at different circumferential positions on the compressor rotor exit. Along the rotor rotating direction， the total pressure gradually decreases in the high temperature region， and gradually increases in the low temperature region. The closer to the stall point， the greater non-uniform of the total pressure radial distribution. As the mass flow is further reduced， the type of the inception induced stall is spike， appearing first when the rotor blades turn into the high total temperature region. The circumferential propagation speed of the stall inception and that of the stall cells at the beginning of the stall are about 88.9% and 66.0% of the rotor speed， respectively. The entire stall process is accompanied by a significant fluctuation of the mass flow， caused by the movement and merging of the stall cells along the circumferential direction.

Key words: total temperature distortion, transonic compressor, unsteady flow, rotating stall, spike

CLC Number:

V231.3

Hongliang ZHAO, Wenqiang ZHANG, Jiahui QIU, Min ZHANG, Juan DU, Chaoqun NIE. Unsteady simulation of stall process in transonic compressor with total temperature distortion[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(14): 628319-628319.

Figures/Tables 21

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关键参数	数值
最大功率/kW	800
最大扭矩/（N∙m）	350
最大转速/（r·min^-1）	20 500
最大转子直径/m	0.38
轮毂比	~0.5
叶尖相对马赫数	~1.4
转子/静子叶片数	16/29

分类	网格数量/万
分类	粗糙	中等	精细
转子流向	71	121	151
转子周向	61	93	123
转子径向	81	121	161
静子流线	68	108	138
静子周向	42	69	101
静子径向	75	113	153
总网格量	102	247	540

参数	数值
参数	高温区	低温区
总温/K	500	295
总压/kPa	99	99
密度/（kg·m^-3）	0.656 8	1.109 4
轴向速度/（m·s^-1）	141	109
密流/（kg·m^-2·s^-1）	93	121

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Unsteady simulation of stall process in transonic compressor with total temperature distortion

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