離心泵葉片數對其性能影響之數值分析

The Analysis of Centrifugal Pump Performance with Different Number of Blades

林志豐

指導教授 ： 姜庭隆

國立屏東科技大學/工學院/機械工程系所/碩士(2008年)

https://doi.org/10.6346/NPUST.2008.00178

摘要

本研究之目的在於分析葉片數對離心泵輸出效率的性能影響。由離心泵動葉輪尺寸的大小，根據工程經驗方法可決定出適當葉片數目之範圍，再以Gambit軟體建立三維立體模型，CFD套裝軟體FLUENT作數值模擬計算，分析其流場現象及各種性能曲線，以決定在特定流量及揚程之條件下離心泵之最佳葉片數。
CFD模擬結果顯示，泵浦設定轉速1450rpm、流量4 ，7葉泵浦最佳揚程為55.9m、最大效率74.43％；由壓力與馬力的結果分析顯示，不論三葉、五葉、七葉其最佳的效率均是在流量約為4 處，而葉片數量確實會影響其效率與揚程。

關鍵字

離心泵 ； 揚程 ； 流量 ； 葉片

並列摘要

This research analyzes the influence on output effects of blade number of a centrifugal pump. According to the size of the pump’s impeller, the number of blades used can be decided by engineering empirical method. The 3D physical model can be constructed and following meshed （discretized） by Gambit, and the flowfield can be solved by FLUENT. Once the flowfield is solved, the pump efficiency, required power, pressure distribution…etc, can be determined.
The results of CFD simulation shows that when the pump speed is set at 1450rpm, the flow rate of the 7-blade pump reach the highest（maximum） efficiency 74.43%.

並列關鍵字

Centrifugal Pump ； Head ； Flow rate ； Blade

參考文獻

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