Natural convection heat transfer at reduced pressures |
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| Authors: | Wei Liu Jing Wang Yu Li Zhaowei Zhu Dianfu Qie |
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| Institution: | 1. School of Automation, Beijing University of Posts and Telecommunications, Beijing, China;2. Thermal Vacuum Test Division, Beijing Institute of Spacecraft Environment Engineering, Beijing, China;3. Laboratory of Reliability and Environmental Engineering Technology, Beijing, China;4. School of Foreign Languages, Beihang University, Beijing, China;5. School of Biological Science and Medical Engineering, Beihang University, Beijing, China;6. Thermal Vacuum Test Division, Beijing Institute of Spacecraft Environment Engineering, Beijing, China |
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| Abstract: | This paper experimentally studies the natural convection heat transfer characteristics on horizontal and vertical plates at pressures lower than atmospheric value. Eight different pressures ranging from 10Pa to 101.325kPa, and three heating loads were used in the experiments. It is found that natural convection heat transfer characteristics at reduced pressures are independent of the plate arrangements and present different behaviors in two pressure ranges, 10Pa < p < 1000Pa and p > 1000Pa. The experimental heat transfer results are correlated into a non-dimensional equation to help the thermal design of stratosphere aircrafts and airborne equipment. |
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| Keywords: | Natural convection reduced pressure plate stratosphere aircraft |
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