1995 Fiscal Year Final Research Report Summary
Observation of Boiling of Liquid Droplet Without Contact Surface by Microwave Heating.
| Project/Area Number |
06650227
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Thermal engineering
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| Research Institution | Institute of Fluid Science, Tohoku University |
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Principal Investigator |
MARUYAMA Sigenao Institute of Fluid Science, Tohoku University Associate Professor, 流体科学研究所, 助教授 (80173962)
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| Co-Investigator(Kenkyū-buntansha) |
HIGANO Mitsuo Institute of Fluid Science, Tohoku University Research Associate, 流体科学研究所, 助手 (50006201)
TAKAGI Toshiyuki Institute of Fluid Science, Tohoku University Associate Professor, 流体科学研究所, 助教授 (20197065)
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| Project Period (FY) |
1994 – 1995
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| Keywords | Boiling / Phase Change / Contactless Heating / Microwave / Bubble |
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| Research Abstract |
Most of phase change phenomenon such asboiling are the phenomenonusing the heat transfer surface, and therefore cannot avoid the bubble nucreay on the wall of the container or the temperature distribution in the fluid.
The object of the present research is analyzing the phase change phenomenon not by adding heat from the boundary of the solid bodies but by adding heat directly to the fluid.
(1). As a first step, development of the radiation heat transfer analysis of participating media is conducted. Analysis of temperature distribution in a participating mediumsuch as water under the condition of volumetric heating without using the wall surface is carried out.
(2). Next, electromagnetic waves are concentrated and micro-wave generator is remodeled to get the high energy field, but when the reflected waves reach to the magnetron ; it destroys the generator. It is found that the muchincrease of the energy density can't be seen under these circumstances.
(3). In order to search for another energy increasing method, reflection of electromagnetic wave in the sealed container and characteristics of concentration are theoretically analyzed. Micro-wave heating problem of plasma is examined by the numerical simulation.
(4). And also, as a fundamental experiment of stabilizing the single fluid drop floated in the air, the experiment of air plane and dropshaft under the condition of microgravity is carried out, and numerical analyzes are conducted to examine the measurement method under the condition of microgravity.
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