A General Theory of Flow-Instability Inception in Turbomachinery

A General Theory of Flow-Instability Inception in Turbomachinery
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涡轮机械中流动不稳定起始的一般理论

DOI:
10.2514/1.j052186
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发表时间:
2013-07
期刊:
影响因子:
2.5
通讯作者:
Sun, Dakun
Sun, Dakun
中科院分区:
工程技术3区
文献类型:
--
作者:
Sun, Xiaofeng;Liu, Xiaohua;Hou, Ruiwei;Sun, Dakun

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提出了涡轮机械流动稳定性的一般特征值理论,重点关注流动不稳定的发生。基于该理论,为多级风扇/压缩机系统开发了包含复杂实体几何效应的失速初始模型。本模型预测失速起始点的能力是根据低速和跨音速单旋翼的实验数据进行评估的。与简化的二维模型进行比较,以确定一般配置中流场的展向分布对相关风扇/压缩机的不稳定模式的不可忽略的影响。经验证,该模型能够以合理的精度预测亚音速和跨音速流失速起始点的质量流量,并且在工业应用的计算成本方面是可持续的。
A general eigenvalue theory on flow stability in turbomachinery is proposed with the emphasis on flow-instability onset. Based on this theory, a stall-inception model including the effects of complex solid geometry is developed for a multistage fan/compressors system. The capacity of the present model to predict the stall-inception point is assessed against experimental data of both a low-speed and transonic single rotor. Comparisons with a simplified two-dimensional model are performed to identify the nonnegligible effects of spanwise distribution of flowfield in a general configuration on the unstable mode of the concerned fan/compressors. It is verified that this model is capable of predicting mass flow at the stall-onset point of both subsonic and transonic flow with a reasonable accuracy, and it is sustainable in terms of computation cost for industrial application.
DOI: 10.1115/gt2006-90040
发表时间: 2013-07
期刊: --
影响因子: --
作者:
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通讯作者: R. Chima
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发表时间: 1993-04-01
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预测跨音速轴流风扇/压缩机失速开始的模型
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发表时间: 2011-12
影响因子: 5.7
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