Volume 15, Issue 10 (2015)                   Modares Mechanical Engineering 2015, 15(10): 212-224 | Back to browse issues page

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Zaree A H, Javareshkian M H. Investigation of induced velocity and lift sensitivity analysis in blade element theory for simulation of flapping wing in hovering flight. Modares Mechanical Engineering. 2015; 15 (10) :212-224
URL: http://journals.modares.ac.ir/article-15-12277-en.html
Abstract:   (1970 Views)
In first part of this study the methods of direct and indirect entering the effect of induced velocity in blade element theory to achieve lift force in hover flight of Drosophila flapping insect are investigated. Then a new algorithm for Induced velocity correction based on Rankin-Froude jet theory and direct method is presented. The results of previous and new methods to aerodynamic simulation of this insect in hovering flight with combined flapping and pitching angles were compared with published experimental results. The results of this comparison indicate that one of the models based on the indirect method as the best way to predict the experimental results. In second part of this work, the sensitivity of the instantaneous and mean force, produced by insect modeled wing, is examined with change in six wing important motion parameters. This parameters Includes: flapping frequency, phase difference between flapping and pitching angle, flapping and pitching amplitudes and flapping and pitching variations with respect to time in flapping cycle. The results show that with increasing frequency and flapping amplitude lift increasingly increases. Also, range of phase difference percent between flapping and pitching angle that lead to maximum lift of the wings is introduced. Results also show that with tending variation of flapping angle in cycle to sinusoidal trend, the lift force increases.
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Article Type: Research Article | Subject: Aerodynamics
Received: 2015/06/7 | Accepted: 2015/08/19 | Published: 2015/09/14

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