Abstract： Three kinds of adjustable high specific speed mixed-flow pump were simulated by using commercial software Fluent.Reynolds time-averaged N-S equations and the standard k-ε turbulent model were adopted.Multiple reference frame model of rotating fluid mechanical model was used.Absolute velocity and static pressure distribution of the cross-section of the highest point at entrance of blade of 0 riding angle model were mainly analyzed.Relative velocity and static pressure of the pressure surface of the impeller and static pressure of guide blade were also analyzed and compared.The impact phenomenon at back flow of +4 riding angle was captured.Relative velocity of pressure surface of guide blade of 0 riding angle was analyzed.In the result,guide blade sufficiently displays its function of energy conversion and anti-circulation.The interior flow of high specific speed mixed-flow pump was revealed by the results of the analysis.
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