Base on the theory about Coriolis force on rotate cavity,the project to restrain swirl ratio on the cavity behind centrifugal impeller disk was designed,and then analyzed by the numerical tool.The result showed that:the project about radial outer flow on the cavity behind centrifugal impeller disk was dominated by the Coriolis force,which can restrain the swirl ratio and increase the static pressure coefficient to 0.88 on the cavity exit,the static pressure coefficient increased by 16.6％compared to plan A,so it can increase the axial force on the cavity behind impeller disk and improve the light load of bearing and reverse the direction of axial force at small state.But due to the great velocity diversity between rotation wall and air,the power wasting on the cavity behind impeller disk increased,the temperature of air exit increased to 30 K.The result was validated on rotating heat exchange coefficient testing stand.
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