• Publications
  • Influence
Aircraft viscous drag reduction using riblets
The last two decades have seen considerable research activity on the use of riblets for viscous drag reduction. Experimental results concerning the performance of 3 M riblets on airfoils, wings andExpand
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Flow management techniques for base and afterbody drag reduction
Abstract The problem of turbulent base flows and the drag associated with it have been of significant interest in missile as well as fighter aircraft design. Numerous studies in the literature haveExpand
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Effectiveness of passive devices for axisymmetric base drag13; reduction at mach 2
Experiments have been made to assessthe effectiveness of passive devices for reducing base and total afterbody drag at Mach 2. The devices examined ir.dude primarily base cavities and ventilatedExpand
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Relaminarization in highly favourable pressure gradients on a convex surface
We report here the results of experiments on two flows – one on a convex surface and the other on a flat surface – designed to bring out explicitly the influence of streamwise curvature onExpand
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Viscous Drag Reduction Using Riblets on NACA 0012 Airfoil to Moderate Incidence
Results of viscous drag reduction using riblets from 3M on a NACA 0012 airfoil model up to moderate angles of attack are presented. Measurements made consisted of model surface pressureExpand
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Passive control of surface pressure fluctuations in reattaching flows
  • R. Kumar, P. Viswanath
  • Materials Science
  • The Aeronautical Journal ()
  • 1 December 2002
Abstract Experiments assessing the effectiveness of passive control involving a porous surface and cavity underneath for reducing the level of surface pressure fluctuations in reattaching flows areExpand
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Calculations of average characteristics of EAS components and Monte Carlo calculations of their fluctuations using different models of nuclear interactions. II. Muons
The results pertaining to the muon component obtained in the calculations described in Part I are presented. The predicted lateral distributions and energy spectra of muons with energies aboveExpand
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EFFECT OF RIBLETS ON AXISYMMETRIC BASE PRESSURE
Experiments have been performed assessing riblet effects on axisymemtric base pressure at low speeds. The tests were conducted in the 0.91-m-diam. low-speed wind tunnel at a freestream velocity of 20Expand
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Application of PSP To the Study of 3D Shock-Boundary Layer Interaction
Experiments have been performed documenting the pressure field using a PSP technique in blunt fin-induced turbulent boundary layer interactions at a freestream Mach number of 1.8. Three blunt fins ofExpand
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Riblets on airfoils and wings - A review AIAA Paper 99-3402
This review paper summarizes the current status of research on the use of riblets for viscous drag reduction on 2D airfoils and swept wings. These applications have additional effects, such asExpand
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