Shroud leakage flow models and a multi-dimensional coupling CFD (computational fluid dynamics) method for shrouded turbines
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- 作者：Zhengping Zoua ; Jingyuan Liua ; Weihao Zhanga ; zhangweihao@buaa.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Peng Wangb
- 关键词：Turbine ; Shroud ; Leakage flow ; Modeling ; Multi-dimensional scaling ; Multi-dimensional coupling
- 刊名：Energy
- 出版年：2016
- 出版时间：15 May 2016
- 年：2016
- 卷：103
- 期：Complete
- 页码：410-429
- 全文大小：5179 K
文摘
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Free and wall attached jet theories are used to model the leakage flow in shrouds.
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Leakage flow rate is modeled by virtual labyrinth number and residual-energy factor.
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A scaling method is applied to 1D model to obtain 2D distributions on interfaces.
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A multi-dimensional coupling CFD method for shrouded turbines is proposed.
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The proposed coupling method can give accurate predictions with low computing cost.