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題名 | High-Resolution Navier-Stokes Computations of The Axisymmetric Shell wi th Turbulence Models=高解析度數值法之軸對稱彈體紊流流場計算 |
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作者 | 戴昌賢; 田玉龍; | 書刊名 | 力學 |
卷期 | 9:3 1993.09[民82.09] |
頁次 | 頁209-218 |
分類號 | 440.137 |
關鍵詞 | 流場; 紊流; 高解析度數值法; 軸對稱; 彈體; 軸對稱砲彈; 黏性流; 上風法; Roe氏數值法; Axisymmetric projectile; High-resolution scheme; Viscous flow; Upwind scheme; Roe's scheme; |
語文 | 英文(English) |
中文摘要 | 本文研究一個有效率的數值方法可解流經軸對稱砲彈外型的可壓縮黏性流場之統 御方程式。本程式之特點為可模擬彈體全流場現象,包括分離流與渦流。高解析度多階顯示 上風通量差分法( explicit multi-stage upwind flux-difference split scheme )配合 三種不同之紊流模式( Baldwin and Lomax algebraic model, Mitcheltree one-equation model and Launder-Sharma k- ε two-equation model )來解雷諾平均納威爾-史托克斯 方式( Reynolds-Averaged Navier-Stokes Equations )由於本計算程式於不連續處施予 適當之限制子( kappa-scheme ),故能將數值震盪限制於兩網格之間,基於此由本法可稱 之為高解析度數值法。 與零攻角 SOCBT 彈體實驗數據比較,其模擬結果顯示本計算程式能 準確預測彈體之氣動力係數。 |
英文摘要 | A computationally efficient method was presented in this study for solving the axisymmetric governing equations of the viscous compressible flows of projectile configuration. The explicit multi-stage, high-resolution upwind flux-difference split scheme with three different turbulence models (Baldwin and Lomax algebraic model, Mitcheltree one-equation model and Launder-Sharma k- ε two-equation model) were used for solvig steady Reynolds-Averaged Navier-Stokes equations for axisymmetric projectile geometry. Such a scheme has been termed as defined as referred to as a high-resolution scheme, because with the proper use of the limiter, steady discontinuities are spread by the k-scheme over only two cells without oscillations. Test cases were calaulated for transonic and supersonic speeds flowing over a secant-ogive-cylinder-boattail (SOCBT) body at zero angle of attack. Good agreement was obtained between the present computed results and experimental measurements of surface pressure. |
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