查詢結果分析
相關文獻
- Predictions of Free Shear Flows with a Three Equation Turbulence Model
- Second-Order Closure Turbulence Models: Their Achievements and Limitations
- 熱擴散紊流場之重整化研究(2)--廣義熱擴散方程式與廣義混合流方程式
- Numerical Predictions of Wall Bounded Turbulent and Bypass Transitional Flows using a New Two-Scale Two-Equation Turbulence Model
- 熱擴散紊流場之重整化研究(1)--隨機微分方程式與廣義Kolmogoroff模型
- A Numerical and Experimental Study of Dispersion of a H[feaf]S Source in Turbulent Shear Flow
- 具阻塊之三維高溫雙矩形噴射撞擊流場數值模擬
- Modeling Effects on Numerical Simulation of Natural Gas Combustion with Highly Preheated Air
- A Bypass Transition Model by Convecting the Production Term in the Turbulent Kinetic Transport Equation
- 同軸噴流燃燒室紊流流場模擬
頁籤選單縮合
題 名 | Predictions of Free Shear Flows with a Three Equation Turbulence Model=應用三方程式紊流模式預測自由剪力流 |
---|---|
作 者 | 游勝璋; 許熙廷; 林昭安; | 書刊名 | 中國機械工程學刊 |
卷 期 | 20:5 1999.10[民88.10] |
頁 次 | 頁511-516 |
分類號 | 440.137 |
關鍵詞 | 紊流模式; 自由剪力流; Turbulence modelling; Free shear flows; Jet; |
語 文 | 英文(English) |
中文摘要 | 本文著重於模擬紊流狀態下的自由剪力流。文中採用一新時間尺度τ來代替常用 的時間尺度 k- ε。計算結果顯示平面及圓管噴流在自我相似區的擴散率可被這一三方程模 式正確預側。這一模式同時被應用於俱共同流的圓管噴流流場。由於共同流影響所造成圓管 噴流的擴散率減少也被這一模式正確預測。 |
英文摘要 | The present study concerns with numerical simulations of homogeneous and inhomogeneous turbulent free shear flows. A new time scale τ ,which is governed by a transport equation, is incorporated into the k- ε model to replace the commonly adopted time scale, k/ ε. The spreading rates of the plane and round jets in the self-similar state were correctly reproduced employing the new time scale in the turbulence model. The k- ε - τ model is then applied to simulate round jet with co-flow condition. The reduction of the jet spreading under co-flow condition is captured correctly by the model. |
本系統中英文摘要資訊取自各篇刊載內容。