本研究之目的在於分析水冷式散熱模組小型離心式泵浦之設計參數對其性能的影響。利用數值方法配合實驗分析，找出高性能之水力與幾何設計。依比速率決定泵浦的設計條件後，根據設計理論估算出葉片與渦形殼的幾何參數，將CAD所建立之模型以CFD套裝軟體FLUENT作數值計算，分析其流場現象與性能曲線。實驗部份，則以模擬最佳之泵浦作為製作實驗模型之依據，利用儀器量測其操作點之轉速、流量及壓力分析其性能曲線，比較模擬結果驗證其正確性。
　　CFD模擬結果顯示，以NPSHR估算本文設計泵浦在轉速3000rpm時的操作點並無氣穴問題發生，其最大流量為13.1LPM、最大揚程為1.36m，由流場分析的速度分布與壓力分布可看出並無發生渦漩與流線不順暢之二次流現象。從實驗結果可知在3000rpm轉速下，最大流量為11.3LPM、最大揚程為1.18m，証明CFD在泵浦的模擬分析上有相當之準確性；並且與市售小型水冷泵浦模擬與實驗結果的比較下，本文設計泵浦流量為其流量之2.8倍，揚程為其之0.4倍。

　　This research aims to analyze the effects of different design factors on the performance of small size water cooling module centrifugal pump. With CFD simulation and experimental analysis, the optimum hydraulic and geometric designs have been investigated. Under the design conditions defined by specific speed, the geometrical parameters of the blade and volute are worked out on the basis of design theory. The fluid field and performance curve of the numerical model established by CAD are then analyzed according to the calculation made by CFD software FLUENT. The experiment measures the rotational speed, flow rate and pressure of a modeled optimum pump, making an analysis of the performance curve of different parameters, which shows similar results compared with the simulation.
　　Based on NPSHR estimate, the result of CFD simulation shows that no cavitation is found inside the pump at the operating point of 3000rpm. The flow rate reaches a maximum of 13.1LPM, and the head 1.36m. According to the velocity distribution, the fluid field shows no secondary flow as in vortex and streamline. The experimental analysis reveals that the pump shows a maximum flow rate of 11.3LPM and a maximum head of 1.18m at the operating point of 3000rpm, which indicates that the application of CFD to the simulation provides an accurate prediction. Compared with commercial pump, the model pump of this research is 2.8 times higher in flow rate and 0.4 times lower in head.

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