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題 名 | 同軸三維非穩態突擴燃燒室流場結構之分析=Analysis of Field Structure of Unsteady Three-Dimensional Coaxial Combustor in Sudden Expansions |
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作 者 | 莊書豪; 江俊顯; | 書刊名 | 機械技師學刊 |
卷 期 | 7:4 2014.12[民103.12] |
頁 次 | 頁25-29 |
分類號 | 446.4122 |
關鍵詞 | 三維; 突擴燃燒室; 紊流模式; 控制體積法; Three-dimensional; Sudden expansion combustor; Turbulence model; Control volume method; |
語 文 | 中文(Chinese) |
中文摘要 | 本文研究之目的,主要是建立三維突擴燃燒室之暫態數值模擬基礎,並探討突擴管流場之結構。文中採用低雷諾數κ-ε雙方程式紊流模式配合邊牆函數(wall function)封閉求解紊流雷諾時平均方程組,以SIMPLEST計算法解速度與壓力的耦合問題,並以控制體積法建立差分方程式,分別就不同雷諾數及有無渦漩作用下,分析突擴燃燒室流場在各種截面下之結構。由數值模擬分析結果顯示,雷諾數及渦漩作用對燃燒室流場結構有極重要影響。 |
英文摘要 | The purpose of this paper was established the basis of transient numerical simulation for threedimensional coaxial combustor in sudden expansions. The closure problem of turbulent Reynolds time mean equations was solved by use the low Reynolds number κ-ε double turbulent model with wall function. The SIMPLEST algorithm had used to solve the velocity and pressure couple problem, and utilized the control volume method to construct the difference equations, The results of coaxial combustor in sudden expansions at different Reynolds number with vortex or withont vortex had analyzed and shown its flow field structure. From the numerical simulation analysis shown that the factors of vortex and Reynolds number are very important effects in the flow field structure of coaxial combustor in sudden expansions. |
本系統中英文摘要資訊取自各篇刊載內容。