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博碩士論文 etd-0728111-171828 詳細資訊
Title page for etd-0728111-171828
論文名稱
Title
具等距加熱源之垂直平板於自然對流流場內之熱流分析
Numerical simulation for natural convection on a vertical plate with equally spaced heating block
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
82
研究生
Author
指導教授
Advisor
召集委員
Convenor
楊建裕
Yang, Chien-Yuh
口試委員
Advisory Committee
黃仁智
Hwang, Jen-Jyh
口試日期
Date of Exam
2011-07-04
繳交日期
Date of Submission
2011-07-28
關鍵字
Keywords
數值模擬、渠道流、瑞利數、自然對流、間隔加熱源
channel flow, Numerical, Natural convection, spaced heating source, Rayleigh number
統計
Statistics
本論文已被瀏覽 5651 次,被下載 2108
The thesis/dissertation has been browsed 5651 times, has been downloaded 2108 times.
中文摘要
本研究以數值方法模擬兩垂直平板間之流道在一邊具有間隔發熱源的情形下,自然對流散熱之流場與熱傳特性,並透過改變其流道寬度、發熱體與發熱間隔等參數探討其散熱之最佳化。因電子零件的高效率與微小化,電子零件的散熱問題近期受到了極大的重視,其散熱能力甚至會成為限制電子零件發展的關鍵因素。由於近年來LED背光之液晶螢幕的發展,我們使用LED背光模組做為模型來探討其溫度分布與熱傳率。結果顯示雖然熱傳率會隨著瑞利數上升而跟著增加,但到了較高的瑞利數時,其增加幅度變為不明顯。本文中我們將呈現熱傳率(紐賽數)與瑞利數之關係,以提供在相關熱傳散熱問題設計上之參考。
Abstract
The cooling problem has become a serious subject in order to keep away from malfunctioning for a high performance and miniaturized electronic component. For instance, the monitor backlight LED must be cooled adequately. In this thesis, a natural convection cooling problem for the vertical channel with equally spaced heating blocks on one wall is studied by a numerical modeling to simulate a monitor backlight LED cooling. A control volume method is employed for the numerical modeling. The results of heat transfer coefficients and hot spots for various channel gap, LED spacing and Rayleigh number are presented. This study can provide design reference for related cooling problems.
目次 Table of Contents
目錄
目錄 i
圖目錄 iii
表目錄 v
摘要 vi
Abstract vii
符號說明 viii
第一章 緒論 1
1.1 前言 1
1.2 研究背景與動機 1
1.3 文獻回顧 3
第二章 基礎理論 8
2.1 物理模型 8
2.2 基本假設 8
2.3 統御方程式 (Governing Equation) 8
2.4 邊界條件 10
2.5 無因次化 10
2.6 邊界條件無因次化 12
2.7 分析處理的無因次化 12
第三章 數值方法 14
3.1 流體區域的離散 14
3.2 SIMPLEC演算法 17
第四章 結果與討論 21
4.1 流場模型分析 21
4.2 網格劃分分析 22
4.3 RGB LED模型之結果 23
4.4 3014 LED模型之結果 23
4.5 5630 LED模型之結果 24
4.6 綜合結果與討論 25
第五章 結論與未來展望 65
5.1 結論 65
5.2 未來展望 66
參考文獻 67
參考文獻 References
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[19] Nichia Corporation, http://www.nichia.com/
[20] LiteOn Technology Corporation, http://www.liteon.com/
[21] Samsung Corporation, http://www. samsung.com/
[22] Osram Corporation, http://www.osram.com/
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