基于自由尾迹方法的自转旋翼气动特性研究

doi:10.7527/S1000-6893.2015.0076

Abstract

Abstract:

To investigate autorotating rotor aerodynamic characteristics, a free wake method calculation model which couples blade flapping motion model and trim model of autorotating rotor is established in this paper, and an analysis method for autorotating rotor aerodynamic characteristics is established. Then, this method is verified by a test example of an autorotating rotor based on the method. Lastly, wake geometry and rotor disk induced inflow distribution characteristics of autorotating rotor are investigated by the method. The results indicate that the free wake method calculation model established in this paper can meet the requirement of autorotating rotor aerodynamic characteristics analysis and the model accuracy is higher compared with the traditional approximate inflow model. Autorotating rotor wake moves upward and backward from the rotor disk as time goes on in the forward flight. The distortion of autorotating rotor wake is slightly smaller than powered rotor in the horizontal plane. The distribution of autorotating rotor disk induced inflow is nonuniform. Downwash inflow generally increases gradually from the leading edge to the trailing edge of the rotor disk. Autorotating rotor induced inflow is less than powered rotor near 90° azimuth and at the trailing edge of the rotor disk at the same thrust.

Key words: rotor, wake, blade, flap, trim, aerodynamic characteristics, helicopter

CLC Number:

V211.52

WANG Junchao, TAN Jianfeng, LI Jianbo, XU Ming. Investigation of autorotating rotor aerodynamic characteristics based on free wake method[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(11): 3540-3548.

References

[1] Floros M W, Johnson W. Performance analysis of the slowed-rotor compound helicopter configuration[C]//American Helicopter Society 4th Decennial Specialists' Conference on Aeromechanics. Alexandria:AHS, 2004:1-19.
[2] Yeo H, Johnson W. Aeromechanics analysis of a heavy lift slowed-rotor compound helicopter[J]. Journal of Aircraft, 2007, 44(2):501-508.
[3] Nagaraj V T, Chopra I. Dynamics considerations for high speed flight of compound helicopters[C]//American Helicopter Society 58th Annual Forum. Alexandria:AHS, 2002:1-14.
[4] Yeo H, Johnson W. Optimum design of a compound helicopter[J]. Journal of Aircraft, 2009, 46(4):1210-1221.
[5] Berry B, Chopra I. Performance and vibratory load measurements of a slowed-rotor at high advance ratios[C]//American Helicopter Society 68th Annual Forum. Alexandria:AHS, 2012:1-13.
[6] Leishman J G. Development of the autogiro:a technical perspective[J]. Journal of Aircraft, 2004, 41(4):765-781.
[7] Kim H Y, Sheen D J, Park S O. Numerical simulation of autorotation in forward flight[J]. Journal of Aircraft, 2009, 46(5):1642-1648.
[8] Rezgui D, Lowenberg M H, Bunniss P C. Experimental and numerical analysis of the stability of an autogiro teetering rotor[C]//Americian Helicopter Society 64th Annual Forum. Alexandria:AHS, 2008:1-15.
[9] Rigsby J, Prasad J. Performance and trim analysis of lightly loaded rotors in high advance ratio autorotation[C]//American Helicopter Society Aeromechanics Specialists' Conference. Alexandria:AHS, 2010:1-23.
[10] Niemi E E, Gowda B V. Gyroplane rotor aerodynamics revisited-blade flapping and RPM variation in zero-g flight[C]//49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. Reston:AIAA, 2011:1-17.
[11] Wang H J, Gao Z. Aerodynamic virtue and steady rotary speed of autorotating rotor[J]. Acta Aeronautica et Astronautica Sinica, 2001, 22(4):337-339(in Chinese).王焕瑾,高正.自转旋翼的气动优势和稳定转速[J].航空学报, 2001, 22(4):337-339.
[12] Zhu Q H. Research on key technologies of gyroplane preliminary design[D]. Nanjing:Nanjing University of Aeronautics and Astronautics, 2007(in Chinese).朱清华.自转旋翼飞行器总体设计关键技术研究[D].南京:南京航空航天大学, 2007.
[13] Cui Z, Han D, Li J B. Study on aerodynamic characteristics of auto-rotating rotors with Gurney flaps[J]. Acta Aeronautica et Astronautica Sinica, 2012, 33(10):1791-1799(in Chinese).崔钊,韩东,李建波.加装格尼襟翼的自转旋翼气动特性研究[J].航空学报, 2012, 33(10):1791-1799.
[14] Ji L Q, Zhu Q H, Cui Z, et al. Research on aerodynamic characteristics of autorotating coaxial twin-rotor[J]. Journal of Aerospace Power, 2012, 27(9):2013-2020(in Chinese).姬乐强,朱清华,崔钊,等.共轴双旋翼自转气动特性[J].航空动力学报, 2012, 27(9):2013-2020.
[15] Wang J C, Li J B, Han D. Theoretical modeling technology for gyroplane flight performance[J]. Acta Aeronautica et Astronautica Sinica, 2014, 35(12):3244-3253(in Chinese).王俊超,李建波,韩东.自转旋翼机飞行性能理论建模技术[J].航空学报, 2014, 35(12):3244-3253.
[16] Wang J C, Li J B. Effects of wing on autogyro longitudinal stability[J]. Acta Aeronautica et Astronautica Sinica, 2014, 35(1):151-160(in Chinese).王俊超,李建波.机翼对自转旋翼机纵向稳定性的影响[J].航空学报, 2014, 35(1):151-160.
[17] Kini S, Conlisk A T. Nature of locally steady rotor wakes[J]. Journal of Aircraft, 2002, 39(5):750-758.
[18] Ananthan S, Leishman J G. Transient helicopter rotor wakes in response to time-dependent blade pitch inputs[J].Journal of Aircraft, 2004, 41(5):1025-1041.
[19] Fletcher T M, Brown R E. Helicopter tail rotor thrust and main rotor wake coupling in crosswind flight[J]. Journal of Aircraft, 2010, 47(6):2136-2148.
[20] Yoo S J, Jeong M S, Lee I. Wake effects of free-wake model on aeroelastic behavior of hovering rotors[J]. Journal of Aircraft, 2011, 48(4):1184-1192.
[21] Tan J F, Wang H W. Highly efficient unsteady panel time-marching free wake for aerodynamics of rotorcraft[J].Journal of Aircraft, 2014, 51(1):54-61.
[22] Bagai A, Leishman J G. Rotor free wake modeling using pseudo implicit technique including comparisons with experimental data[J]. Journal of the American Helicopter Society, 1995, 40(3):29-41.

Investigation of autorotating rotor aerodynamic characteristics based on free wake method

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	YANG Mingyue, SHOU Yingxin, TANG Yong, LIU Chang, XU Bin. Multi-quadrotor UAVs formation maintenance and collision avoidance control [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(S1): 726913-726913.
[2]	AN Liping, WANG Hao, WANG Yangang, ZHU Zihuan. Wet compression performance and flow characteristics of transonic compressor [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(9): 126024-126024.
[3]	WU Zhiyuan, YAN Han, WU Linchao, MA Hui, QU Yegao, ZHANG Wenming. Vibration characteristics of rotating cracked-blade-flexible-disk coupling system [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(9): 625442-625442.
[4]	SUN Yang, CHANG Min, BAI Junqiang. Trajectory planning and control for micro-quadrotor perching on vertical surface [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(9): 325756-325756.
[5]	ZHOU Wei, MA Peiyang, GUO Zheng, WANG Daoping, ZHOU Ruisun. Research of combined fixed-wing UAV based on wingtip chained [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(9): 325946-325946.
[6]	DUAN Fajie, NIU Guangyue, ZHOU Qi, FU Xiao, JIANG Jiajia. A review of online blade tip clearance measurement technologies for aeroengines [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(9): 626014-626014.
[7]	FAN Yongsheng, YANG Xiaoguang, SHI Duoqi, TAN Long, HUANG Weiqing. Rafting-waste judgement of serviced turbine blades: quantitative characterization and threshold determination [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(9): 625100-625100.
[8]	NIU Guangyue, DUAN Fajie, ZHOU Qi, LIU Zhibo. A dynamic measurement method of blade tip clearance based on microwave phase difference ranging [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(9): 625396-625396.
[9]	WU Qiang, XU Haojun, WEI Yang, PEI Binbin, XUE Yuan. Aerodynamics/flight dynamics coupling characteristics of aircraft under icing conditions [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(8): 125566-125566.
[10]	SUN Canfei, HUANG Linran, SHEN Yong. Fault diagnosis of helicopter planetary gear transmission system under complex operating conditions [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(8): 625480-625480.
[11]	WANG Weimin, CHEN Ziwen, ZHANG Xulong, CHEN Kang. Fault diagnosis method of rotor rub impact based on blade tip timing [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(8): 625031-625031.
[12]	LI Yingjie, ZHAO Guang, WU Xueshen, LI Jian, YUAN Wei, MEI Qing. Review of research on self-excited vibration of aviation spline-rotor system [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(8): 625532-625532.
[13]	TAN Jianfeng, HE Long, YU Lingjun, ZHOU Guochen. Helicopter brownout modeling based on viscous vortex particle and sand particle DEM [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(8): 125536-125536.
[14]	JI Honglei, SU Junjie, CHEN Renliang, KONG Weihong. Highland atmospheric turbulence model for helicopter flight simulation [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(7): 126564-126564.
[15]	GUO Jiahao, ZHOU Zhou, LI Xu. An efficient design method for blade of ducted propeller [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(7): 125253-125253.