共轴刚性旋翼桨毂中间轴涡流发生器设计与减阻研究
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摘要
为最大程度地降低共轴刚性旋翼桨毂的气动阻力,在其减阻设计方案中间轴处加装翼型截面的涡流分割器。首先设计了不同展长、弦长、安装位置和数量的涡流发生器加装方案,之后采用求解N-S方程的方法计算和分析了加装涡流发生器之后的桨毂阻力特性、表面压力和空间流动情况等。结果表明加装涡流发生器能使桨毂减阻方案的阻力降低约5%,弦长增大、涡流发生器位置向下桨毂方向移动有利于进一步降低阻力。研究结果可为涡流发生器的应用和桨毂减阻设计提供一定的参考。
In order to minimize the aerodynamic drag of coaxial rigid rotor hub,the airfoil cross-section vortex generator installed on the shaft fairing. The vortex generator installation programs with different expansion length,chord length,installation number and locations are designed,then calculate and analysis the drag characteristics of coaxial twin hub by the method of solving N-S equation. Finally,the surface pressure and spatial flow are analyzed. The results show that vortex generator can reduce about 5% of the drag of coaxial twin hub drag reduction program. The increment of chord length and the movement of vortex generator to lower hub is conducive to further reduce the drag. The research results can provide a reference for the application of vortex generator and the drag reduction design of rotor hub.
In order to minimize the aerodynamic drag of coaxial rigid rotor hub,the airfoil cross-section vortex generator installed on the shaft fairing. The vortex generator installation programs with different expansion length,chord length,installation number and locations are designed,then calculate and analysis the drag characteristics of coaxial twin hub by the method of solving N-S equation. Finally,the surface pressure and spatial flow are analyzed. The results show that vortex generator can reduce about 5% of the drag of coaxial twin hub drag reduction program. The increment of chord length and the movement of vortex generator to lower hub is conducive to further reduce the drag. The research results can provide a reference for the application of vortex generator and the drag reduction design of rotor hub.
引文
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[14]李永全,黄勇,陈建中,等.曲而形栅格翼气动特性研究[J].空气动力学学报,2016,34(4):536-540.LI Yongquan,HUANG Yong,CHEN Jianzhong,et al.Investigation of aerodynamic characteristics on circular-arc gric-fin configurations[J].Acta Aerodynamica Sinica,2016,34(4):536-540.
[15]CODER J G,CROSS P A,SMITH M J.Turbulence modeling strategies for rotor hub flows[C]//Proceedings of American Helicopter Society 73rd Annual Forum.Texas,USA:United Technologies Research Center,2017.
[16]SCHMITZ S,REICH D,SMITH M J,et al.First rotor hub flow prediction workshop experimental data campaigns and computational analyses[C]//Proceedings of American Helicopter Society 73rd Annual Forum.Texas,USA:United Technologies Research Center,2017.
[2]吴希明.高速直升机发展现状、趋势与对策[J].南京航空航天大学学报,2015,47(2):173-179.WU Ximing.Current status,development trend and countermeasure for high-speed rotorcraft[J].Journal of Nanjing University of Aeronautics&Astronautics,2015,47(2):173-179.
[3]龙海斌,吴裕平.直升机桨毂减阻设计进展[J].航空科学技术,2017,28(5):8-13.LONG Haibin,WU Yuping.Progress in drag reduction design of helicopter hub[J].Aeronautical Science&Technology,2017,28(5):8-13.
[4]HILL M J,LOUIS M E.Rotating hub drag prediction methodology[C]//American Helicopter Society Specialists’Conference on Future Vertical Lift Aircraft Design.San Francisco,California,USA:[s.n.],2012.
[5]KHIER W.Computational investigation of advanced hub fairing configurations to reduce helicopter drag[C]//40th European Rotorcraft Forum.Southampton,UK:[s.n.],2012.
[6]曾伟,林永峰,黄水林,等.共轴双旋翼桨毂减阻初步分析研究[J].直升机技术,2014,181(4):14-18.ZENG Wei,LIN Yongfeng,HUANG Shuilin,et al.Preliminary analytical study on drag reduction of coaxial rotors[J].Helicopter Technique,2014,181(4):14-18.
[7]龙海斌,吴裕平,朱仁淼.共轴式双旋翼直升机桨毂减阻设计方法研究[J].直升机技术,2017(2):22-26LONG Haibin,WU Yuping,ZHU Renmiao.Study on drag reduction design method of coaxial twin rotor helicopter hub[J].Helicopter Technique,2017(2):22-26.
[8]何龙,王畅,唐敏,等.共轴刚性旋翼直升机桨毂阻力特性试验[J].南京航空航天大学学报,2016,48(4):530-535.HE Long,WANG Chang,TANG Min,et al.Drag characteristic test for hub of coaxial-rigid-rotor helicopter[J].Journal of Nanjing University of Aeronautics&Astronautics,2016,48(4):530-535.
[9]LORBER P,LAW G,O’NEILL J,et al.Overview of S-97 raider scale model tests[C]//Proceedings of American Helicopter Society 72nd Annual Forum.West Palm Beach,FL:United Technologies Research Center,2016.
[10]BOWLES P O,THOMAS M,GEIGER D,et al.Experimental investigation of passive and active flow control for X2 technology?hub and fuselage drag reduction[C]//Proceedings of American Helicopter Society 72nd Annual Forum.West Palm Beach,FL:United Technologies Research Center,2016.
[11]WAKE B E,HAGEN E,OCHS S S,et al.Assessment of helicopter hub drag prediction with an unstructured flow solver[C]//Proceedings of American Helicopter Society 65th Annual Forum.Texas Grapevine,USA:United Technologies Research Center,2009.
[12]胡偶,赵宁,沈志伟.SST-DDES技术在大分离流动问题中的应用[J].南京航空航天大学学报,2017,49(2):206-211HU Ou,ZHAO Ning,SHEN Zhiwei.Simulation of large separated flows with SST-DDES model[J].Journal of Nanjing University of Aeronautics&Astronautics,2017,49(2):206-211.
[13]武明建,朱建辉,肖天航,等.某支线客机总体方案中增升装置的设计与优化[J].南京航空航天大学学报,2017,49(3):411-419.WU Mingjian,ZHU Jianhui,Xl AO Tianhang,et al.Design and optimization of high-lift device in overall design of civil aircraft[J].Journal of Nanjing University of Aeronautics&Astronautics,2017,49(3):411-419.
[14]李永全,黄勇,陈建中,等.曲而形栅格翼气动特性研究[J].空气动力学学报,2016,34(4):536-540.LI Yongquan,HUANG Yong,CHEN Jianzhong,et al.Investigation of aerodynamic characteristics on circular-arc gric-fin configurations[J].Acta Aerodynamica Sinica,2016,34(4):536-540.
[15]CODER J G,CROSS P A,SMITH M J.Turbulence modeling strategies for rotor hub flows[C]//Proceedings of American Helicopter Society 73rd Annual Forum.Texas,USA:United Technologies Research Center,2017.
[16]SCHMITZ S,REICH D,SMITH M J,et al.First rotor hub flow prediction workshop experimental data campaigns and computational analyses[C]//Proceedings of American Helicopter Society 73rd Annual Forum.Texas,USA:United Technologies Research Center,2017.