Study and verification on similarity theory for propellers of stratospheric airships
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摘要: 根据螺旋桨相似理论,选择等Re数和等前进比作为一组相似准则.通过数值模拟验证该相似准则组合的正确性和适用性,着重研究密度对螺旋桨相似性参数的影响,并将螺旋桨数值计算结果与缩比模型地面常规密度风洞试验的有关结果进行了对比分析.结果表明:数值模拟的不同工作高度下螺旋桨无量纲气动力系数相互重合,螺旋桨数值计算结果和地面风洞试验结果基本吻合,表明在所选择的相似准则下,密度基本不影响螺旋桨相似性参数.平流层飞艇螺旋桨可以在地面常规密度风洞中按照等Re和等前进比相似准则进行缩比模型试验,为平流层螺旋桨的试验研究提供参考依据.Abstract: According to similarity theory of propellers, equal Reynolds number and equal advanced ratio similarity was selected as a group of similarity criterion combination. The effect of different density on the propeller similarity criterion was investigated by using numerical simulation. The chosen similarity criterion and correctness of applicability were verified. The relevant test results obtained by using the ground wind tunnel test on the scaled propeller model and the numerical simulation results of the stratosphere propellers were compared and analyzed. The results show that the nondimensional aerodynamic character curves of propellers at different altitudes are nearly agreement with each other. And the experimental results in ground wind tunnel is corresponding to the results of numerical simulations. It means that the air density influences little of propeller similarity parameters. So that, the scaled model experiment of propeller for stratospheric airships in ground wind tunnel is feasible according to equal Reynolds number and advanced ratio similarity, and provides reference basis for the wind tunnel test of propellers in stratosphere.
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Key words:
- stratospheric airships /
- propeller /
- similarity theory /
- numerical simulation
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[1] 郝鹏飞.平流层大飞艇,拿未来说事儿[J].新知容,2006(12):99-102
Hao Pengfei.The future stratosperic airships[J].Chinese Newlore Magzine,2006(12):99-102(in Chinese)[2] Brooke L.High altitude LTA platforms:capabilities and possibilities.AIAA 2005-7319,2005 [3] Colozza A.High altitude propeller design and analysis overview.NASA-CR-1998-208520,1998 [4] Koch L D.Design and performance calculations of a propeller for very high altitude flight.NASA/TM-1998-206637,1998 [5] Colozza A,Dolce J L.High-altitude,long-endurance airships for coastal surveillance.NASA/TM-2005-213427,2005 [6] 赵忠.螺旋桨特性风洞试验技术研究.西北工业大学航空学院,2007
Zhao Zhong.Research on wind tunnel test technology of Propeller characteristics.School of Aeronautics,Northwestern Polytechnical University,2007(in Chinese)[7] 刘沛清.空气螺旋桨理论与应用[M].北京:北京航空航天大学出版社,2006
Liu Peiqing.Air propeller theory and application[M].Beijing:Beijing University of Aeronautics and Astronautics Press,2006(in Chinese)[8] 聂营.平流层飞艇高效螺旋桨设计与试验研究.中国科学院研究生院,2008
Nie Ying.The design and experiments study 0n high efficient propeller used for stratospheric airship.Graduate University of Chinese Academy of Sciences,2008(in Chinese)[9] 刘沛清,马蓉,段中喆,等.平流层飞艇螺旋桨地面风洞试验[J].航空动力学报,2011,26(8):1775-1781
Liu Peiqing,Ma Rong,Duan Zhongzhe,et al.Experiment study of light-weight,high-efficiency propeller of stratospheric airships in ground wind tunnel[J].Journal of Aerospace Power,2011,26(8):1775-1781[10] 马蓉.平流层低动态飞行器高效螺旋桨设计技术研究.北京航空航天大学航空科学与工程学院,2010
Ma Rong.Design technology study on the high-efficiency propeller of the low dynamic vehicles in stratosphere.School of Aeronautic Science and Engineering,Beijing University of Aeronautics and Astronautics,2010 -
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