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| Numerical Simulation on Influences of Stratospheric Airships Envelope with Different Layouts of Propeller on Convective Heat Transfer Coefficient on Envelope |
| Received:December 16, 2019 Revised:December 17, 2019 |
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| DOI：10.7643/issn.1672-9242.2020.01.005 |
| KeyWord:airship propeller thermal characteristics of envelope stratosphere CFD |
| Author | Institution |
| ZHANG Yu |
School of Aeronautics and Astronautics, Shanghai Jiaotong University, Shanghai , China |
| XIE Wei-cheng |
School of Aeronautics and Astronautics, Shanghai Jiaotong University, Shanghai , China |
| WANG Xiao-liang |
School of Aeronautics and Astronautics, Shanghai Jiaotong University, Shanghai , China |
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| Abstract: |
| The purpose aims to reduce the diurnal temperature variation of helium in envelope and helium. Based on mature CFE numerical analysis software-FLUENT, the influences of airflow velocity distribution on envelope under the propeller layout of head, both sides and tail were compared. For the layout of propeller mounted the side and tail of airship, the airflow speed could reach up to about 32m/s accelerated by the propeller at inflow speed of 15m/s, the acceleration ratio was about 2.13, which would increase the forced convective heat transfer coefficient by twice. The layout of propeller mounted the head of airship could increase the velocity of envelope and reduce the temperature difference of envelope and helium. The layout of propeller mounted the side and tail of airship can increase the local velocity of envelope and reduce the local temperature difference of envelope and helium. |
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