Krishnan, V and Viswanath, PR and Rudrakumar, S (1997) Effect of riblets on axisymmetric base pressure. Journal of Spacecraft and Rockets, 34 (2). pp. 256-258. ISSN 0022-4650
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Abstract
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 20 m/s. It is shown that, with a large-scale or massive separation, riblets do not decrease the base drag at low speeds; on the other hand, there is a progressive increase in base drag with h+ and the drag penalty is about 8 percent for the optimized drag reducing riblet. Riblets may provide a small pressure or base drag reduction on streamlined bodies with a sharp trailing edge like an airfoil or turbine blade, because the effects of viscous-induced displacement thickness will be lower on the riblet surface.
| Item Type: | Journal Article |
|---|---|
| Additional Information: | Copyright for this article belongs to AIAA |
| Uncontrolled Keywords: | Base pressure;Riblets;Drag reduction;Reynolds number;Skin friction |
| Subjects: | AERONAUTICS > Aerodynamics |
| Division/Department: | Experimental Aerodynamics Division, Experimental Aerodynamics Division, Experimental Aerodynamics Division |
| Depositing User: | M/S ICAST NAL |
| Date Deposited: | 08 Mar 2010 |
| Last Modified: | 24 May 2010 09:51 |
| URI: | http://nal-ir.nal.res.in/id/eprint/2848 |
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