Title page for etd-0907111-155440


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URN etd-0907111-155440
Author Jia-Wei Chen
Author's Email Address kent810321@yahoo.com.tw
Statistics This thesis had been viewed 5356 times. Download 1421 times.
Department Mechanical and Electro-Mechanical Engineering
Year 2010
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Characterization of Water Spray Temperature Distribution and Liquid Film Growth Processes
Date of Defense 2011-07-13
Page Count 92
Keyword
  • spray cooling
  • μLIF
  • spray
  • liquid film thickness
  • droplets
  • Abstract The aim of this study was to explore the properties of thermal field in spray cooling via experiments. The nozzle diameter (dj) used herein was 200 μm and the heating surface measured 45 mm × 45 mm. The study was divided into two parts for experiments and analyses. In the first part, with DI water and FC-72 (dielectric liquid) as the working media, the changes in the liquid film thickness on the heater surface under different values of heating power were observed; heat input (Q) and value of gauge pressure (ΔP) were taken as the main parameters for discussing the influence of these two parameters on the liquid film thickness in spray cooling. The second part, with DI water as the working medium, adopted the μLIF system (fluorescent dye: Rhodamine B; concentration: 1.5×10-4 M) to measure the effect of different working medium temperatures (23 °C, 30 °C, and 40 °C) on the global temperature distribution, liquid film temperature changes on the heater surface and the thermal field condition of spray cooling, with an aim of exploring the internal physical phenomena of the droplets during cooling.
    Advisory Committee
  • Ching-Jeng Ho - chair
  • Shin-Chia Su - co-chair
  • Shou-Shing Hsieh - advisor
  • Files
  • etd-0907111-155440.pdf
  • indicate access worldwide
    Date of Submission 2011-09-07

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