چکیده

Centrifugal pumps are widely used in industrial and agricultural fields (irrigation and water supply). The impeller is the main part of a pump And converts mechanical energy into hydraulic pressure. The impeller directly determines the fluid displacement capacity and hydraulic performances of the pump. Accordingly, the optimal design of the impeller is necessary and significant for have the efficient operation of the centrifugal pump thus the main purpose of this study is to investigate the changes in the wrap angle in the centrifugal pump impeller blade on pump performance. In this study, the centrifugal Ets-Norm centrifugal pump (model 2.50 / 100, manufactured by Pumpiran Company) was investigated and analyzed. The impeller installed on the pump shaft was closed with 5 blades and a radius of 170 mm, the blade thickness was 6 mm and the impeller outlet angle was 20 degrees. The effect of the blade wrap angle was studied on the pump performance. The five impellers were designed with wrap angles (100 °, 105 °, 110 °, 115 ° and 120 °). The effects of changing the wrap angle on the head, flow, efficiency and pressure distribution on the pump impeller were analyzed. The results showed that with increasing the wrap angle of the impeller blade, the amount of head and pump flow decreased and also, with increasing the wrap angle, the amount of pump efficiency decreased so that with increasing the warp angle from 100 degrees to 120 degrees, the amount of pump efficiency decreased by 4.93%. The results showed that with increasing the impeller wrap angle, the pressure on the blade at the fluid inlet to the impeller increased and the area under high pressure at the impeller inlet was larger than the outlet impeller.

کليدواژه ها

Centrifugal Pump, CFTurbo, impeller geometry

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ابراهیم ابراهیمی , 1400 , Centrifugal Pump Performance Analysis Affected by changes in the Blade Wrap Angle of impeller , دهمین کنفرانس ملی کاربرد CFD در صنایع شیمیایی و نفت