徐玉梅,刘丹丹,谢俊良,沈 建,杨 健.宽窄扩压器失速机理模拟分析[J].轻工机械,2015,33(3): |
宽窄扩压器失速机理模拟分析 |
Simulation and Analysis of Stall Mechanism for Wide and Narrow Diffusers |
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DOI:I0. 3969/j . issn. 1005 -2895. 2015. 03. 009 |
中文关键词: 离心压缩机 扩压器 失速机理 数值模拟 |
英文关键词:centrifugal compressor diffuser stall mechanism numerical simulation |
基金项目:军品配套研制项目:扩压器失速机理与预防技术研究(JPPT-115 -2-980-1) |
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中文摘要: |
针对扩压器在小流量下失速的现象,利用FLUENT对单扩压器模型进行了数值模拟,分别对扩压器的稳定状态
和失速状态进行了分析。在稳定状态下,扩压器进口的气体给定均匀、周向射流尾迹分布及轴向线性分布,结果表明轴
向不均分布影响较大;而在失速状态下,模拟了失速的发展过程,并分析结构参数对失速的影响,重点讨论了扩压器宽度
的影响。结果表明,不同宽度的扩压器存在不同的失速机理。 |
英文摘要: |
Aiming at the diffuser stall phenomenon at small flow.the single diffuser model was simulated by using Fluent
software .the steady status and stall condition were analyzed respectively. Under steady status.radial velocity was imposed
on the diffuser inlet with uniform.circumferential jet-wake and axially linear distribution respectively. Result shows that
axial non-uniformity has more important impact. And under stall condition . the development process of stall was simulated
and the influence of structure parameters was analyzed, especially the width of the diffuser. Result show that diffusers with
different widths have different stall mechanisms. |
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