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博碩士論文 etd-0101118-111804 詳細資訊
Title page for etd-0101118-111804
論文名稱
Title
介電液於壓電霧化片之熱場與流場分析
Analysis of Flow and Heat Transfer Characteristics of Spray Cooling with Dielectric Fluids Using Piezoelectric Atomizer
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
100
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2018-01-17
繳交日期
Date of Submission
2018-02-01
關鍵字
Keywords
噴霧冷卻、壓電單孔霧化片、介電液、IPI、μPIV
IPI, piezoelectric atomizer, dielectric fluid, μPIV, Spray cooling
統計
Statistics
本論文已被瀏覽 5650 次,被下載 73
The thesis/dissertation has been browsed 5650 times, has been downloaded 73 times.
中文摘要
本研究主要探討HFE-7100與HFE-7300兩種介電液在壓電單孔霧化片 (孔徑直徑為35 μm) 進行噴霧冷卻實驗時的流場與溫度觀測,其中加熱板為ITO玻璃。主要實驗參數為噴霧高度 (H = 10 mm、20 mm、30 mm、40 mm) 與加熱板溫度 (Tw = 25℃、75℃、125℃、175℃、225℃)。流場數據使用微質點影像測速儀 (μPIV) 與全像干涉粒徑分析儀 (IPI) 進行拍攝分析獲得噴霧速度場與液滴粒徑。溫度數據則使用T-type熱電偶量測淬火實驗的溫度變化。其中,最大速度均出現在噴霧出口處,分別為7.61 m/s (HFE-7100) 與8.73 m/s (HFE-7300) 並沿噴霧下游遞減;粒徑分佈約在 11.83 μm ~ 17.66 μm (HFE-7100) 與12.32 μm ~ 18.27 μm (HFE-7300);兩者最大熱通量各為1.032 W/cm2 (HFE-7100) 與1.133 W/cm2 (HFE-7300) 均發生在H = 10 mm處。
Abstract
The purpose of this study is to analyze the flow and heat transfer characteristics of spray cooling with two dielectric fluids (HFE-7100 and HFE-7300) using piezoelectric atomizer (dj = 35 μm) as a nozzle and ITO-coated glass as a heater. The main experimental parameters are spray height (H = 10 mm, 20 mm, 30 mm, 40 mm) and heater surface temperature (Tw = 25℃, 75℃, 125℃, 175℃, 225℃). For flow-field measurements, the droplet velocity is measured by μPIV and the droplet size is measured by IPI. The temperature measurements are obtained with T-type thermocouples. From the experimental data, the maximum velocity of two fluids is 7.61 m/s (HFE-7100) and 8.73 m/s (HFE-7300), and the velocity decreases along the downstream; the droplet size is about 11.83 μm ~ 17.66 μm (HFE-7100) and 12.32 μm ~ 18.27 μm (HFE-7300); the CHF of two fluids is 1.032 W/cm2 (HFE-7100) and 1.133 W/cm2 (HFE-7300) when spray height is 10 mm.
目次 Table of Contents
誌謝 i
中文摘要 ii
ABSTRACT iii
TABLE OF CONTENTS iv
LIST OF TABLES vi
LIST OF FIGURES vii
NOMENCLATURE ix
CHAPTER 1 INTRODUCTION 1
1.1 Motivation and background 1
1.2 Objectives 2
1.3 Literature review 2
CHAPTER 2 EXPERIMENTAL SETUP 12
2.1 Fluid delivery system 12
2.2 Heater system 14
2.3 Data acquisition system 14
2.4 Non-intrusive optical measurement system 15
2.5 Other equipment 17
CHAPTER 3 EXPERIMENTAL PROCEDURE 32
3.1 ITO-coated glass heater 32
3.2 μPIV measurements 33
3.3 IPI measurements 34
3.4 Temperature measurements 35
CHAPTER 4 THEORETICAL ANALYSIS 40
4.1 Reynolds number 40
4.2 Weber number 40
4.3 Nusselt number 41
4.4 Jacob number 42
CHAPTER 5 UNCERTAINTY ANALYSIS 43
CHAPTER 6 RESULTS AND DISCUSSION 46
6.1 μPIV measurements 46
6.2 IPI measurement 50
6.3 Quenching cooling measurements 52
CHAPTER 7 CONCLUSIONS AND RECOMMENDATIONS 75
7.1 Conclusions 75
7.2 Recommendations 76
References 78
Appendix A 84
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