Effect of leading edge cut on the aerodynamics of ram-air parachutes

Balaji, R. ; Mittal, S. ; Rai, A. K. (2005) Effect of leading edge cut on the aerodynamics of ram-air parachutes International Journal for Numerical Methods in Fluids, 47 (1). pp. 1-17. ISSN 0271-2091

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Official URL: http://www3.interscience.wiley.com/journal/1096679...

Related URL: http://dx.doi.org/10.1002/fld.779


The effect of the configuration of leading edge cut on the aerodynamic performance of ram-air parachutes is studied via two-dimensional flow simulations. The incompressible Reynolds-averaged Navier-Stokes equations, in primitive variables, are solved using a stabilized finite-element formulation. The Baldwin-Lomax model is employed for turbulence closure. Flow past an LS(1) 0417 airfoil is investigated for various configurations of the leading edge cut and results are compared with those from a Clark-Y airfoil section. It is found that the configuration of the leading edge cut affects the lift-to-drag ratio (L/D) of the parachute very significantly. The L/D value has strong implications on the flight performance of the parachute. One particular configuration results in a L/D value that is in excess of 25 at 7.5° angle of attack. Results are presented for other angles of attack for this configuration.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons, Inc.
Keywords:Finite-element; Ram-air Parachutes; parafoil; Unsteady Flows; Vortex Shedding; Turbulent Flows; Leading Edge Cut
ID Code:24774
Deposited On:30 Nov 2010 09:15
Last Modified:07 Jun 2011 06:59

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