改进型振荡水翼水动力试验及机理
|
摘要
针对不同前缘结构形式的三维水翼进行水动力模型试验,研究在不同摆动速度下水翼的水动力性能,分析不同波浪形前缘结构对水翼性能的影响.选取性能较优的波浪形前缘水翼与普通前缘水翼进行CFD数值模拟,对其流场进行分析,探究波浪形前缘结构对水翼边界流动的扰动机理.研究结果表明:随着摆动速度的增加,水翼的升力、阻力和扭矩都会有不同程度的增加;前缘波浪形水翼凸起的波幅和波长同时较大时对水翼性能的提升有较大的影响;前缘波浪结构能有效减弱水翼吸力面涡流分离对整体性能的扰动,沟槽内的流动对水翼尾流能够起到使其重新贴附翼面的作用,提高水翼的水动力性能.
The hydrodynamic model experiments of three-dimensional hydrofoils with different leading edge structures were carried.The hydrodynamic performance of hydrofoils at different oscillation frequencies was studied,and the influence of different wavy leading edge structures on hydrofoil performance was analyzed.Wave front edge hydrofoils and common leading edge hydrofoils were simulated by computational fluid dynamics(CFD).The flow field was analyzed to investigate the disturbance mechanism of the wavy leading edge structure on hydrofoil boundary flow.Research results show that with the increase of the oscillating frequency,the lift,resistance,and torque of the hydrofoil increase in varying degrees.When the wave amplitude and wavelength of the front edge wavy hydrofoil is larger,it has a great influence on the performance of the hydrofoil.Wave structure of front edge could effectively attenuate the disturbance of vortex separation of hydrofoil suction surface to the overall performance,and the flow in the grooves is able to reattach the wing surface to the hydrofoil wake,improving the hydrodynamic performance of the hydrofoil.
The hydrodynamic model experiments of three-dimensional hydrofoils with different leading edge structures were carried.The hydrodynamic performance of hydrofoils at different oscillation frequencies was studied,and the influence of different wavy leading edge structures on hydrofoil performance was analyzed.Wave front edge hydrofoils and common leading edge hydrofoils were simulated by computational fluid dynamics(CFD).The flow field was analyzed to investigate the disturbance mechanism of the wavy leading edge structure on hydrofoil boundary flow.Research results show that with the increase of the oscillating frequency,the lift,resistance,and torque of the hydrofoil increase in varying degrees.When the wave amplitude and wavelength of the front edge wavy hydrofoil is larger,it has a great influence on the performance of the hydrofoil.Wave structure of front edge could effectively attenuate the disturbance of vortex separation of hydrofoil suction surface to the overall performance,and the flow in the grooves is able to reattach the wing surface to the hydrofoil wake,improving the hydrodynamic performance of the hydrofoil.
引文
[1]CHOI H.Bio-mimetic flow control[C]//Proc of 62nd Annual Meeting of the APS Division of Fluid Dynamics.Minneapoli:American Physical Society,2009,54:1-20.
[2]FISH H,LEGAC P,WEI T,et al.Vortex mechanics associated with propulsion and control in whales and dolphins[J].Comparative Biochemistry and Physiology,2008,150(3):65-66.
[3]FISH F,LAUDER G.Passive and active flow control by swimming fishes and mammals[J].Annual Review of Fluid Mechanics,2006,38:193-224.
[4]FISH F,WEBER P W,MURRAY M,et al.Marine applications of the biomimetic Humpback whale flipper[J].Marine Technology Society Journal,2011,45(4):198-207.
[5]CHOI H,PARK H,SAGONG W,et al.Biomimetic flow control based on mor-phological features of living creatures of living creatures[J].Physics of Fluids,2012,24(12):1-20.
[6]WOODWARD B L,WINN J P,FISH F E.Morphological specialization of baleen whales according to ecological niche[J].Journal of Morphology,2006,267:1284-1294.
[7]JOHARI H,HENOCH C W,CUSTODIO D,et al.Effects of leading-edge protuberances on airfoil performance[J].AIAA Journal,2007,45(11):2634-2642.
[8]ZVERKOV I,ZANIN B,KOZLOV V.Disturbances growth in boundary layers on classical and wavy surface wings[J].AIAA Journal,2008,46(12):3149-3158.
[9]HANSEN K L,KELSO R M,DALLY B,et al.Analysis of the streamwise vortices generated between leading edge tubercles[C]//Proc of Australian Conference on Laser Diagnostics in Fluid Mechanics and Combustion.Canberra:Press of UNSW,2011:1524-1531.
[10]FERNANDES I,SAPKOTA Y,MAMMEN T,et al.Theoretical and experimental investigation of the leading edge tubercles on the wing performance[C]//Proc of Aviation Technology,Integration,and Operations Conference.Los Angeles:AIAA,2013:1-41.
[11]张佐天.仿生前缘凹凸鳍性能理论及实验研究[D].哈尔滨:哈尔滨工程大学船舶与海洋工程学院,2014.
[12]张丽红,李伟杰.仿生机翼流场的数值模拟[J].电脑知识与技术:学术交流,2010,6(16):4579-4580.
[13]金鸿章,潘艳,杨波.小攻角下驼背鲸减摇鳍的理论计算[J].船舶力学.2010,11(14):19-26.
[14]杨君,袁嗣杰,吕镜清.基于FFT的均匀信道化滤波[J].数据采集与处理,2009,24(S1):104-107.
[2]FISH H,LEGAC P,WEI T,et al.Vortex mechanics associated with propulsion and control in whales and dolphins[J].Comparative Biochemistry and Physiology,2008,150(3):65-66.
[3]FISH F,LAUDER G.Passive and active flow control by swimming fishes and mammals[J].Annual Review of Fluid Mechanics,2006,38:193-224.
[4]FISH F,WEBER P W,MURRAY M,et al.Marine applications of the biomimetic Humpback whale flipper[J].Marine Technology Society Journal,2011,45(4):198-207.
[5]CHOI H,PARK H,SAGONG W,et al.Biomimetic flow control based on mor-phological features of living creatures of living creatures[J].Physics of Fluids,2012,24(12):1-20.
[6]WOODWARD B L,WINN J P,FISH F E.Morphological specialization of baleen whales according to ecological niche[J].Journal of Morphology,2006,267:1284-1294.
[7]JOHARI H,HENOCH C W,CUSTODIO D,et al.Effects of leading-edge protuberances on airfoil performance[J].AIAA Journal,2007,45(11):2634-2642.
[8]ZVERKOV I,ZANIN B,KOZLOV V.Disturbances growth in boundary layers on classical and wavy surface wings[J].AIAA Journal,2008,46(12):3149-3158.
[9]HANSEN K L,KELSO R M,DALLY B,et al.Analysis of the streamwise vortices generated between leading edge tubercles[C]//Proc of Australian Conference on Laser Diagnostics in Fluid Mechanics and Combustion.Canberra:Press of UNSW,2011:1524-1531.
[10]FERNANDES I,SAPKOTA Y,MAMMEN T,et al.Theoretical and experimental investigation of the leading edge tubercles on the wing performance[C]//Proc of Aviation Technology,Integration,and Operations Conference.Los Angeles:AIAA,2013:1-41.
[11]张佐天.仿生前缘凹凸鳍性能理论及实验研究[D].哈尔滨:哈尔滨工程大学船舶与海洋工程学院,2014.
[12]张丽红,李伟杰.仿生机翼流场的数值模拟[J].电脑知识与技术:学术交流,2010,6(16):4579-4580.
[13]金鸿章,潘艳,杨波.小攻角下驼背鲸减摇鳍的理论计算[J].船舶力学.2010,11(14):19-26.
[14]杨君,袁嗣杰,吕镜清.基于FFT的均匀信道化滤波[J].数据采集与处理,2009,24(S1):104-107.