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工程力学  2013 

基于Bulk-flow模型的偏心叶轮前侧盖板泄漏流稳态特性分析

DOI: 10.6052/j.issn.1000-4750.2011.09.0590, PP. 298-304

Keywords: 离心叶轮,前侧盖板,偏心率,bulk-flow模型,稳态特性

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Abstract:

通过数值计算分析了叶轮偏心情况下前侧盖板泄漏流流体的稳态特性。基于一种bulk-flow模型建立了由3个非线性偏微分方程组成的流体控制方程。运用有限差分方法和交错网格得到离散化的控制方程,利用SIMPLE算法来完成对离散化控制方程的求解。根据计算结果给出了给定条件下叶轮前侧盖板泄漏流流体的稳态压力分布和速度分布,并分析了叶轮前侧盖板与蜗壳间间隙和叶轮偏心率对叶轮前侧盖板泄漏流流体的稳态压力分布和速度分布的影响。分析结果表明:二者对叶轮前侧盖板泄漏流流体的稳态特性具有明显影响。

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