Study on the hydraulic characteristics of dustpan shaped inlet of an axial flow pump based on PANS
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Abstract:
A three dimensional numerical simulation was carried out using CFD model and a modified secondary development PANS turbulence model,to study the turbulence model applicability for simulation of dustpan shaped inlet axial flow pump.The results showed that the modified PANS turbulence model can capture the vortices of various turbulence scales,and can reflect the detail characteristics of internal flows.Four scheme were proposed to study the influence of isolation pier,length of isolation pier and rear wall distance on the internal hydraulic characteristics of inlet passage.The results showed that the pulsation value of point pressure near the outer wall of inlet passage bell mouth was the smallest in scheme 3,and the pulsation value of the point J3 and J4 was about 77% and 62% of the original scheme.In scheme 4,the internal flow characteristics of inlet passage were the best and the hydraulic loss was the least,which was about 25% of the original scheme.
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