本文的數值求解方法中,壓力-速度耦合使用SIMPLE算則,在離散選項中,將壓力採取物體力加權(Body force weighted) ,動量,體積比率選取QUICK離散格式,能量方程是選用一階上風法(First order upwind scheme) ,振盪式熱管內部填充率為50%進行求解。
並將本研究數值模擬計算結果與有詳細實驗資料的三維振盪式熱管問題加以驗證,證明本文採用數值方法與離散方法確實對於三維振盪式熱管物理機制,傳熱性能分析具有適用性,且進一步選取不同工作流體填充率和不同傾斜角度將其數值結果與實驗最佳化值作分析。 This paper discusses numerical studies of the heat transfer characteristics at vertical heating state of a 3-D closed loop oscillating heat pipe(CLOHP), the parameters studied were working fluid filling ratio ,and inclination angle.
A set of copper-tube CLOHP with internal diameter of 1.3mm,consisting of 4meandering turns and characteristic heat transfer length of 100mm was used in this study.
The CLOHP condenser ,and evaporator section length both are 20mm,working fluid in this study was used water with filling ratio is 50% of total volume of the tube.
The result shows that in this study the model ,numerical method which we chose can predict heat transfer mechanism of 3-D CLOHP, and with different filling ratios ,and inclination angles .Verticl heating modle and filling ratio is 50% compare with others inclination angles ,and filling ratio ,it heat resistance is the optimum.