国防科技大学学报2023，Vol.45Issue(6)：40-47,8.DOI:10.11887/j.cn.202306005
平流层飞艇气动特性相似缩比分析与风洞试验
Scaled similarity analysis of aerodynamic characteristics and wind tunnel test for stratospheric airship
摘要
Abstract
The analysis and design method of the sky-ground scaled similarity of aerodynamic characteristics for stratospheric airship were described in detail.The similarity criteria for the rigid and flexible models to complete the wind tunnel tests were given.Two kind of scaled models and wind tunnel test were completed.By analyzing the wind tunnel experimental data for scaled models,it was found that the aerodynamic characteristics of the stratospheric airship under different inflatable internal pressures were basically same,but the rigid body model was obviously different.The aerodynamic drag coefficient under flexible characteristics was significantly higher than that of rigid body,and even twice as high as that under zero attack angle,which lead to the essential changes of the rolling aerodynamic torque characteristics,such as stability and divergence.It has important engineering application value for evaluating flexible aerodynamic characteristics of stratospheric airship,especially under low pressure state.And it overcomes the disadvantages of using rigid body aerodynamic characteristics data or engineering estimation method in the airship overall design of"dynamic-resistance balance".关键词
相似性/气动特性/风洞试验/平流层飞艇/缩比模型Key words
similarity/aerodynamic characteristics/wind tunnel test/stratospheric airship/scaled model分类
航空航天引用本文复制引用
史智广,左宗玉,杨玉洁..平流层飞艇气动特性相似缩比分析与风洞试验[J].国防科技大学学报,2023,45(6):40-47,8.基金项目
国家自然科学基金资助项目(62073019) （62073019）
