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題名 | 超音速流場中橫向刻槽噴流三維效應對二維數值模擬的影響 |
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作者姓名(中文) | 曾培元; 鄭澤明; | 書刊名 | 中正嶺學報 |
卷期 | 22:1 1993.07[民82.07] |
頁次 | 頁161-173 |
分類號 | 447.55 |
關鍵詞 | 二維數值; 三維效應; 橫向刻槽噴流; 流場; 超音速流動; Roe's法則; 多種成份方程式; Transverse slot injetction; Supersonic flow; Roe's scheme; Three-dimensional; Multi-species equation; |
語文 | 中文(Chinese) |
中文摘要 | 本文研究主旨在以數值計算模擬噴流氣體經由平板面上刻槽噴嘴以音 速垂直噴人平板超音速空氣流場中之橫向噴流流場。外形取自Aso等人(1991)所 做實驗的模型。自由流馬赫數為3.7,雷諾數為2.07E7。採用Navier-Stokes方程 式配合Baldwin-Lomax的代數索流模式以及兩種組成份方程式做為統御方程式, 數值方法則使用顯式多階上風通量差分法(ExplicitMulti-Stage,High-Resolution Upwind Flux-Difference SplitScheme,Roe's Scheme)。模擬結果顯示與實驗值吻合。 證明本文使用方法能準確且有效模擬具橫向噴流的平板流場;同時也證明在某些 情況下三維效應對二維數值模擬的影響甚鉅。 |
英文摘要 | This paper describes a study concerning the numerical simulation of a sonic gaseous jetthrough a transverse slot nozzle in a flat plate discharging normally into a supersonic air flow.The configuration selected is from the slot injetcion experiments of Aso et al. (1991) withfreestream Mach number of 3.7 and Reynolds number of 2.07E7. The governing equationsused are the three-dimensional Reynolds-averaged Navier-Stokes equations coupled with theBaldwin-Lomax algebraic turbulence model. Two species equations and relevant transportproperties are also included. The numerical method implemented is the explict multi-stage,high-resolution upwind flux-difference split scheme (Roe's scheme). The comparisons betweenthe two- dimensional calculated results with the experimental data of the surface pressure arein good agreement. All distinctive features of the intricate flowfield structure appear to havebeen well reproduced numerically. It is also shown that the three-dimensional effects in theexperiment cause a large discrepancy on two-dimensional numerical simulation at some conditions. |
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