A Case Study on the Air Flow Characteristics of the Hirobo-FALCON 505 Controllable Helicopter's Main Rotor Blade


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The aerodynamics of the helicopter rotor is one of the most elating and exigent tribulations faced by the aerodynamicists today. Study through flow visualization process plays a key role in understanding the airflow distinctiveness and vortex interaction of the helicopter main rotor blade. Inspecting and scrutinizing the effects of wake vortices during operation is a great challenge and imperative in designing effective rotor system. This study aimed to visualize the main rotor airflow pattern of the Hirobo-FALCON 505 controllable subscale helicopter and seek for the vortex flow at the blade tip. The experimental qualitative data is correlated with quantitative data to perform scrupulous study on the airflow behavior and characteristics along with its distinctiveness spawned by the main rotor blade. Simulation using design software is performed in analogous stipulations to endow with comparability between the flow visualization results. Throughout the blade span several dissimilar flow patterns have been identified. The main rotor hub has turbulent flow at its center due to low energy of air amassed in this region whereas in the middle portion of the rotor blade, the air encompasses high kinetic energy with a clear straight streamline pattern.



Edited by:

Abdel Hamid Ismail Mourad and József Kázmér Tar




Z. B. A. Awal and M. S. bin Ammoo, "A Case Study on the Air Flow Characteristics of the Hirobo-FALCON 505 Controllable Helicopter's Main Rotor Blade", Applied Mechanics and Materials, Vol. 527, pp. 39-42, 2014

Online since:

February 2014




* - Corresponding Author

[1] A. Bangalore, L. N. Sankar, Numerical Analysis of Aerodynamic Performance of Rotors With Leading Edge Slats, Computational Mechanics 17, (Springer-Verlag, 1996), pp.335-342.

DOI: https://doi.org/10.1007/bf00368556

[2] L. Dadone, Helicopter Design DATCOM, NASA CR- 153247, Vol. I-Airfoils (1976).

[3] K. W. Noonan, B. J. Bingham, Aerodynamic Characteristics of Three Helicopter Rotor Airfoil Sections from Model Scale to Full Scale at Mach Numbers from 0. 35 to 0. 9, NASA Technical Paper 1701. AVRADCOM TR-80-B-5, (1980).

[4] G. Guglieri, Using of Particle Swarm for Performance Optimization of Helicopter Rotor Blades, Scientific Research-Applied Mathematics, 3, (2012), pp.1403-1408.

DOI: https://doi.org/10.4236/am.2012.330197

[5] R. Celi, Recent Applications of Design Optimization to Rotorcraft-A Survey, American Helicopter Society 55th Annual Forum, Montreal, (25-27 May 1999).