摘 要

脈動(dòng)熱管是一種適用于微小空間、高熱流密度散熱要求的新型熱管技術(shù)，在微電子器件冷卻、太陽能集熱和制冷空調(diào)等許多領(lǐng)域具有很高的潛在應(yīng)用價(jià)值。脈動(dòng)熱管運(yùn)行機(jī)理極其復(fù)雜，具有高度非線性、結(jié)構(gòu)不穩(wěn)定性的特征，是一種涉及多學(xué)科的復(fù)雜汽液兩相流系統(tǒng)。目前的實(shí)驗(yàn)研究主要集中在二維脈動(dòng)熱管領(lǐng)域，而對三維脈動(dòng)熱管則尚未見報(bào)道。

本文針對目前脈動(dòng)熱管的研究現(xiàn)狀，開展了如下工作：

1、通過查閱資料了解脈動(dòng)熱管的發(fā)展現(xiàn)狀，及各種因素對脈動(dòng)熱管傳熱性能的影響。對脈動(dòng)熱管工作原理和結(jié)構(gòu)特征進(jìn)行了描述，并闡述了國內(nèi)外的研究進(jìn)展。

2、將設(shè)計(jì)的三維脈動(dòng)熱管應(yīng)用于大功率LED的散熱研究，探究了三維脈動(dòng)熱管在不同加熱功率下的傳熱性能。

3、將相變材料（PCM）和泡沫金屬相結(jié)合應(yīng)用于三維脈動(dòng)熱管，探究了基于PCM的三維脈動(dòng)熱管傳熱性能。

關(guān)鍵詞：三維脈動(dòng)熱管  LED  PCM  泡沫金屬  傳熱性能 

ABSTRACT

Pulsating heat pipe is a new type of heat pipe technology used for the cooling requirements of the confined space and high heat flux conditions，which has high potential application value in the cooling of microelectronic device, solar heat, refrigeration and air conditioning and many other areas. However，the operation mechanism of pulsating heat pipe is actually quit complex，which is two-phase flow system related with several subjects with the characteristics of highly nonlinear and structural instability. The present experimental studies are mainly concentrated in the field of two dimensional pulsating heat pipe, while for three-dimensional pulsating heat pipe has not yet been reported.

In this thesis， aiming at the current status of pulsating heat pipe， to carry out the following work:

Firstly， through referring to a variety of paper to understand the current development of the pulsating heat pipe，and the impact of various factors on its heat transfer performance. To describe the principle and the occasion of pulsating heat pipe， and the progress of their studies at home and abroad.

Secondly， putting the three-dimensional pulsating heat pipe to be used in the study of high power LED about heat dissipation， and investigating the heat transfer performance of three-dimensional pulsating heat pipe in the different heating power.

Finally， the combination of the phase change materials (PCM) and foam metal is applied to three-dimensional pulsating heat pipe, and to investigate the heat transfer performance of three-dimensional pulsating heat pipe based on PCM.

Keywords:  three-dimensional pulsating heat pipe，LED， PCM， foam metal， heat transfer performance

目錄

第一章  緒論 1

1.1課題研究背景 1

1.2 簡介 2

1.2.1 脈動(dòng)熱管簡介 2

1.2.2 PCM簡介 3

1.2.3泡沫金屬簡介 3

1.3 研究現(xiàn)狀 5

1.4本課題的主要工作 6

第二章  實(shí)驗(yàn)裝置及系統(tǒng)設(shè)計(jì) 7

2.1實(shí)驗(yàn)系統(tǒng)設(shè)計(jì) 7

2.2脈動(dòng)熱管組件 7

2.2.1三維脈動(dòng)熱管 7

2.2.2 PCM及泡沫金屬 8

2.3抽真空系統(tǒng) 9

2.4數(shù)據(jù)采集系統(tǒng) 10

2.4.1熱電偶 10

2.4.2數(shù)據(jù)采集器 10

2.5 計(jì)算機(jī)及處理軟件 11

2.6 熱管理系統(tǒng) 11

2.6.1加熱組件 11

2.6.2散熱組件 13

第三章  實(shí)驗(yàn)過程 14

3.1 熱電偶的標(biāo)定 14

3.2 基于PCM的泡沫金屬的制備 15

3.3 脈動(dòng)熱管抽真空和充注工質(zhì) 16

3.4熱電偶的布置及實(shí)驗(yàn)裝置連接 17

3.5無PCM時(shí)的三維脈動(dòng)熱管傳熱性能研究 18

3.6應(yīng)用PCM時(shí)三維脈動(dòng)熱管傳熱性能研究 18

第四章  實(shí)驗(yàn)結(jié)果與分析 20

4.1 不同加熱功率下脈動(dòng)熱管的傳熱性能 20

4.2 三維脈動(dòng)熱管蒸發(fā)段的溫度特性 22

4.3 基于PCM的三維脈動(dòng)熱管傳熱性能分析 23

4.3.1 泡沫銅孔隙率及PCM相關(guān)計(jì)算 23

4.3.2 基于PCM的三維脈動(dòng)熱管傳熱熱阻計(jì)算分析 24

4.3.3 基于PCM的三維脈動(dòng)熱管各部分溫度變化過程 26

第五章 結(jié)論及展望 29

5.1本文工作的主要結(jié)論 29

5.2 對今后工作的展望 29

參考文獻(xiàn) 30

致謝 33