Numerical Analysis of Cavitation Instabilities In Inducer Blade Cascade
Numerical Analysis of Cavitation Instabilities In Inducer Blade Cascade
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DOI：
10.1115/fedsm2005-77357
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发表时间：
2008-04
期刊：
影响因子：
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通讯作者：
B. Pouffary;R. F. Patella;J. Reboud
中科院分区：
文献类型：
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作者：
B. Pouffary;R. F. Patella;J. Reboud
利用CFD软件Fine/TurboTM对某四叶片火箭发动机涡轮泵诱导器的空化行为进行了数值模拟。对程序进行了修改，以考虑到基于均匀空化方法的空化模型，以及液体/蒸汽混合物的正压状态定律[1-4]。在本研究中，非定常空化数值模型被应用于由诱导轮几何形状绘制的四叶片叶栅。诱导轮叶片吸力面上的空化片的非定常行为依赖于流量和空化数σ。在标称流量和不同空化数的情况下，同时考虑了叶片间的四个通道，对叶片叶栅上空化的瞬时演化进行了数值模拟。根据流动参数的不同，定常或非定常行为会自发发生。在非定常情况下，观测到了亚同步或超同步模式。提出并讨论了导致这些不稳定性发展的一些机制。版权所有(2005)
The cavitation behavior of a four-blade rocket engine turbopump inducer was simulated by the CFD code Fine/TurboTM . The code was modified to take into account a cavitation model based on a homogeneous approach of cavitation, coupled with a barotropic state law for the liquid/vapor mixture [1–4]. In the present study, the numerical model of unsteady cavitation was applied to a four-blade cascade drawn from the inducer geometry. Unsteady behavior of cavitation sheets attached to the inducer blade suction side depends on the flow rate and cavitation number σ. Numerical simulations of the transient evolution of cavitation on the blade cascade were performed for nominal flow rate and different cavitation numbers, taking into account simultaneously the four blade-to-blade channels. Depending on the flow parameters, steady or unsteady behaviors spontaneously take place. In unsteady cases, sub synchronous or super synchronous regimes were observed. Some mechanisms responsible for the development of these instabilities are proposed and discussed.Copyright © 2005 by ASME