| 张宇,谢炜程,王晓亮.平流层飞艇螺旋桨布局对蒙皮表面对流换热系数影响数值仿真研究[J].装备环境工程,2020,17(1):25-30. ZHANG Yu,XIE Wei-cheng,WANG Xiao-liang.Numerical Simulation on Influences of Stratospheric Airships Envelope with Different Layouts of Propeller on Convective Heat Transfer Coefficient on Envelope[J].Equipment Environmental Engineering,2020,17(1):25-30. |
| 平流层飞艇螺旋桨布局对蒙皮表面对流换热系数影响数值仿真研究 |
| Numerical Simulation on Influences of Stratospheric Airships Envelope with Different Layouts of Propeller on Convective Heat Transfer Coefficient on Envelope |
| 投稿时间：2019-12-16 修订日期：2019-12-17 |
| DOI：10.7643/issn.1672-9242.2020.01.005 |
| 中文关键词: 飞艇 螺旋桨 蒙皮热特性 平流层 CFD |
| 英文关键词:airship propeller thermal characteristics of envelope stratosphere CFD |
| 基金项目:国家自然科学项目基金(61733017)；上海市自然科学基金(18ZR1419000) |
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| 中文摘要: |
| 目的 降低蒙皮以及囊体内部氦气的昼夜温差。方法 基于成熟的CFD数值分析软件FLUENT，通过针对头部、两侧以及尾部螺旋桨布局下其尾流对于蒙皮表面气流速度分布的影响进行比较分析。结果 侧部和尾部布局的螺旋桨，在来流速度15 m/s条件下，经过螺旋桨的气流加速后，速度最高可达约32 m/s，加速比约为2.13，会使强迫对流换热系数增加为原来的2倍。头部螺旋桨布局可提高整个飞艇外表面的速度，增强其强迫对流特性。结论 螺旋桨布局在艇身两侧和尾部，可改变艇身局部区域的流场速度，增强局部热的强迫对流特性。 |
| 英文摘要: |
| 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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