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首页> 外文期刊>日本機械学会論文集. B編 >Analysis of Flow Forces Acting on a Spool Valve (1st Report, Non-Uniformity of Flow Pattern and Momentum Flux in the Azimuthal Direction)
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Analysis of Flow Forces Acting on a Spool Valve (1st Report, Non-Uniformity of Flow Pattern and Momentum Flux in the Azimuthal Direction)

机译：分析作用在滑阀上的流体力（第一个报告，方位角方向的流型和动量通量不均匀）

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摘要

Numerical simulations of three dimensional flow in a spool valve have been made to investigate the flow force acting on the spool. The spool valve adopted here was practical hydraulic type having non-axisymmetrical flow paths with inlet and outlet ports located near the valve orifice. The flow field around the valve orifice was numerically simulated by a quasi-direct simulation based on the finite volume method using a co-location grid. The flow patterns around the spool such as jet angle, reattachment point of jet and vortices generated downstream the valve orifice were found to be non- axisymmetric. The distribution of momentum flux in the azimuthal direction at the valve orifice was strongly influenced by the flow separations at the edge of inlet port and the surface of spool. The non -uniformity of the distribution became mitigative with decreasing the spool stroke.
机译：进行了滑阀三维流动的数值模拟，以研究作用在滑阀上的流动力。这里采用的滑阀是实用的液压类型，具有非轴对称的流路，其入口和出口位于阀孔附近。阀孔周围的流场是通过基于有限体积法并置网格的准直接模拟进行数值模拟的。发现阀芯周围的流动模式（例如射流角，射流的重新连接点和阀孔下游产生的涡流）是非轴对称的。阀孔处动量通量在方位角方向上的分布受到入口边缘和阀芯表面处的流动分离的强烈影响。随着阀芯行程的减小，分布的不均匀性得以缓解。

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