Air Flow Characteristics and Behaviour of Main Rotor Blade of Remote Controlled Model Scale Helicopter

  • Mohd. Shariff bin Ammoo Department of Aeronautics, Automotive and Ocean Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Johor Bahru, Malaysia
  • Ziad Bin Abdul Awal Department of Aeronautics, Automotive and Ocean Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Johor Bahru, Malaysia
  • Jaswar Koto Department of Aeronautics, Automotive and Ocean Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Johor Bahru, Malaysia; Ocean and Aerospace Research Institute, Indonesia
DOI: http://dx.doi.org/10.36842/jomase.v16i1.460

Abstract

The airflow through the main rotor blade system of a helicopter is still not exceedingly well understood owing to its obscurity in aerodynamics. It is prognosticated that helicopter wakes can be significantly greater than those formed by a fixed wing aircraft of the same weight. Nuisance incidents such as brownout & noises are engendered from rotor wake. Study through flow visualization plays a key role in understanding the airflow distinctiveness and vortex interaction of a helicopter 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 at finding a suitable method to visualize the main rotor airflow pattern of a remote controlled subscale helicopter and seek for the vortex flow at the blade tip. The experimental qualitative data is correlated with quantitative data to perform meticulous study on the airflow behaviour & characteristics along with its distinctiveness generated by the main rotor in various flight conditions. Simulation is also performed in similar conditions to bequeath with comparability between the flow visualization results. Several dissimilar flow patterns were identified throughout the blade span. At the centre of the main rotor hub, the presence of turbulent flow was perceived. This is because of the low energy of air pooled in this region. Conversely, an apparent straight streamline pattern in the middle portion of the rotor blade was noticed as the air in this section encompassed high kinetic energy.

##Keywords:## Main Rotor Blade; Hover; Rotor Wake; Induced Velocity; Dynamic Pressure.

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Published
Feb 20, 2015
How to Cite
AMMOO, Mohd. Shariff bin; AWAL, Ziad Bin Abdul; KOTO, Jaswar. Air Flow Characteristics and Behaviour of Main Rotor Blade of Remote Controlled Model Scale Helicopter. Journal of Ocean, Mechanical and Aerospace -science and engineering-, [S.l.], v. 16, n. 1, p. 18-22, feb. 2015. ISSN 2527-6085. Available at: <https://isomase.org/Journals/index.php/jomase/article/view/460>. Date accessed: 25 july 2026. doi: http://dx.doi.org/10.36842/jomase.v16i1.460.
Citation Formats
Issue
Vol 16 No 1 (2015): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Section
Articles

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