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Aerodynamic Drag Reduction for a Simple Bluff Body Using Base Bleed
Technical Paper
2003-01-0995
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Wind tunnel tests have been conducted on a simple bluff body model, representing a car like shape, to investigate drag reduction opportunities from injecting low velocity air into the base region. This flow is known as base bleed. Most tests have been carried out using a square back shape. The effects of flow rate, porosity and porosity distribution over the base area have been investigated. In all cases drag is reduced with increasing bleed rate, but the optimum porosity is a function of bleed rate. A significant part of the drag reduction occurs without the bleed flow and arises from the presence of a cavity in the model. The effects of cavity size are examined for different base configurations. Some factors affecting implementation are considered.
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Howell, J., Sheppard, A., and Blakemore, A., "Aerodynamic Drag Reduction for a Simple Bluff Body Using Base Bleed," SAE Technical Paper 2003-01-0995, 2003, https://doi.org/10.4271/2003-01-0995.Data Sets - Support Documents
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Also In
SAE 2003 Transactions Journal of Passenger Cars - Mechanical Systems
Number: V112-6; Published: 2004-09-15
Number: V112-6; Published: 2004-09-15
References
- Sykes, D.M. The Effect of Low Flow Rate Gas Ejection and Ground Proximity on Afterbody Pressure Distribution Road Vehicle Aerodynamics Symposium The City University November 1969
- Przirimbel, C.E.G. The Effect of Base Bleed/Suction on the Subsonic Near Wake of a Bluff Body Aerodynamics of Transportation, ASME Conference Niagara falls June 1979
- Kohri, I. Kataoka, T. Reduction of Aerodynamic Drag with Base Bleed System JSAE 4 1991
- Nijhof, B.C. The Effect of Base Bleed on Road Vehicle Drag M.Sc Project Cranfield University 2001
- Howell, J.P. The Aerodynamics of the IBEC Club Formula Racing Car The General Engineer May june 1976
- Santer, R.M. Gleason, M.E. The Aerodynamic Development of the Probe IV Advanced Concept Vehicle SAE 831000 1983
- Kohri, I. et al. Aerodynamic Development of an Experimental Car SAE 890373 1989
- Buchholz, Z. More Details on Precept GM's PNGV Automotive Engineering International 36 41 January 2000
- Englar, R.J. advanced Aerodynamic Devices to Improve the Performance, Economics, Handling and Safety of Heavy Vehicles SAE 2001-01-2072 2001
- Morelli, A. A New Aerodynamic Approach to Advanced Automobile Basic Shapes SAE 2001-01-0491 2001
- Duell, E.G. George, A.R. Measurements in the Near Wake of Ground Vehicle Bodies SAE 930298 1993