Author(s): Kousik Kumaar. R, Dr. P. Maniiarasan
Published in: International Journal of Engineering Research & Technology
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Volume/Issue: Volume. 4 - Issue. 07 , July - 2015
Research on drag reduction methodologies relevant to flight vehicles, automotive vehicles, tall structures etc., has received considerable attention during the past 2â€“3 decades. In the airplane or in the wind turbine industry it shows considerable efficiency improvement. Since the aerodynamic efficiency is explained in L/D ratio, decreasing the drag component will increase the aerodynamic efficiency. In this research a methodology to reduce the drag using the riblets over wing surface has been adopted. Since the flow transition from laminar to turbulent around the half chord, the turbulent region will produce less drag when the surface is rough. By this concept this research is being carried out. The effects of riblets on the wake characteristics of a wing can delay the flow separation, operating in a compressible, high-speed environment. Lift, drag and pressure coefficients are measured and the velocity profiles are determined. It is observed that the effect of riblets changes the aerodynamic characteristics of the wing. The riblets have reduced the coefficient of skin friction drag or viscous drag and increased the coefficient of lift along with the stall angle of attack. Computational Fluid dynamic analysis has to be done by creating the models and mesh. The results will be discussed in terms of pressure coefficient, drag reduction etc.
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