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題 名 | 點火系統瞬間釋放熱通量之估算 |
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作 者 | 紀慶嘉; 段伴虬; 陳聰堅; | 書刊名 | 中正嶺學報 |
卷 期 | 23:2 1995.01[民84.01] |
頁 次 | 頁77-84 |
分類號 | 595.5 |
關鍵詞 | 逆向熱傳導; 最佳控制理論; 共軛梯度疊代技術; 熱通量; 急遽遞減法; Inverse heat conduction; Optimal control theory; Conjugate gradient iterative technique; Heat flux; Steepest descent method; |
語 文 | 中文(Chinese) |
中文摘要 | 本文以逆向熱傳導之理論結合最佳化控制理論(OptimalControlTheory)及 共軛梯度疊代技術(Conjugate Gradient Iterative Technique)來估算點火系統在點火 瞬間釋放之熱通量(Heat Flux)隨時間變化的情形。逆向熱傳導應用于熱通量之估 算最大的優點是量測溫度之熱電偶不與點火生成物直接接觸,因此,其量測精度 不受點火產物影響且可重覆使用。而其軛梯度法的優點在於針對未知的熱通量不 需做特定函數型態假設,因在解題時會自動的決定所需函數,另外,此法很穩定 且比急遽遞減法(SteepestDescent Method)收斂更快,能夠有效估算點火系統瞬間釋 放之熱通量,作為評估比較點火系統性能品質,並可提供兩相流內彈道學計算時 熱邊界條件之參考數據。 |
英文摘要 | In this paper, the inverse heat conduction solution methodology based on the optimalcontrol theory and conjugate gradient iterative technique is developed for estimating theenergy output such as the time evolution of heat flux instaneously released in ignitionprocess. The advantages of this methodology are that there is no need to assume aspecific functional form for the unknown heat flux, since the solution automatically determines the functional form over the domain specified. Furthermore, the plume productswill never deposite on the surface of thermocouple so that they can be used with highaccuracy. Finally, the method is stable and convergent over an order of magnitude fasterthan the steepest descent method. This method can efficiently estimate the instaneouslyreleased heat flux from ignition. Also, it can be used to evaluate and compare with thequality of ignition in experiments and supply the thermal boundary condition of two-phase flow interior ballistics at breech. |
本系統中英文摘要資訊取自各篇刊載內容。