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題 名 | Mathematical Modeling of Dense Fuel Droplet Sprays=稠密油滴噴霧之數學模式 |
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作 者 | 王添益; | 書刊名 | 明志工專學報 |
卷 期 | 28 1996.05[民85.05] |
頁 次 | 頁1-15 |
分類號 | 440.137 |
關鍵詞 | 蒸發液滴; 燃燒; 稠密噴霧; 鈕塞數; Vaporizing droplet; Combustion; Dense spray; Nusselt number; |
語 文 | 英文(English) |
中文摘要 | 一相互作用蒸發油滴動力分析之詳細和準確之電腦模擬對於一些包含移動邊界問 題之熱流體及粒子系統之物理瞭解及設計應用是相當重要的。本文探討之重點為油滴燃燒之 特殊型態,一稠密噴霧部份可視為幾個相互作用之蒸發油滴流。假設流動為層流軸對稱且油 滴為球狀。對於氣相部份須解經過獨特轉換之邊界層方程式,而受到移動邊界之相容條件所 限制之液相部份則須解暫態熱傳導方程式。針對三個n-decane油滴流輸入數據,並在不同起 始條件下,將暫態交互作用對於個別油滴之雷諾數、蒸發速率、軸向及橫向油滴╱油滴流間 之距離及空間性平均鈕塞數之影響作一評估。本文中並呈現臨界時間及長度以及顯示出”油 滴對”及即將產生油滴合併之代表性研究例子。 |
英文摘要 | A detailed and accurate computer simulation of the dynamics of interacting vaporizing drolets is important for the physical understanding and design applications of numerous thermal fluid-particle systems including moving boundary problems. Concentrating on specific aspects of fuel droplet combustion, a dense spray portion is conceptualized as several interacting streamers of vaporizing fuel droplets. Assuming laminar axisymmetric flow and spherical droplets, uniquely transformed boundary-layer equations are solved for the gas phase, and the transient conduction equation is solved for the liquid phase subject to compatibility conditions at the moving interface. Using input data for three planar n-decane fuel droplet streamers, the transient interaction effects on the individual droplet Reynolds numbers, vaporization rates, axial and transverse droplet/streamer distances, and spatially-averaged Nusselt numbers have been evaluated for different initial conditions. Critical time and length scales as well as representative case studies illustrating "droplet pairing" and imminent droplet coalescence are presented. |
本系統中英文摘要資訊取自各篇刊載內容。