Vehicular boundary layer control system and method

Land vehicles: bodies and tops – Bodies – Body shell

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Details

244203, 244204, 244208, 244209, 2961801, B62D 3500

Patent

active

060683287

ABSTRACT:
A vehicular boundary layer control system utilizing a series of external perforation arrays and suction sources controlled by a digital signal processor or microprocessor. Each array of perforations in the outer vehicle skin is served by a plenum chamber, which is selectively isolable from a suction manifold. The desired vacuum for each individual plenum and associated array is determined through the sampling of the turbulence associated with that array as well as other sensed environmental parameters. Vacuum is maintained at the desired level in each plenum through the arbitration of various suction sources and the selective restriction of airflow from the plenum(s) to the suction manifold. For terrestrial aerodynamic vehicles, a series of moisture separators are included in the plenums to mitigate the effects of any ingested moisture. The system also includes provision to induce reverse flow through the suction manifold, plenums, and perforation arrays in order to purge the system of dust and other particulates, which may be ingested during operation.

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Internet address http://www.woodhill.co.uk/setup; McLaren F1 automotive design and technical website (No Date).
Joslin, Ronald D., "Simulation of Three Dimensional Symmetric and Asymmetric Instabilities in Attachment-Line Boundary Layers", NASA Langley Research (date unknown).
Buckley, Frank T., et al, "Feasibility of Active Boundary Layer Control Methods for Reducing Aerodynamic Drag on Tractor Trailer Trucks", Journal of Industrial Aerodynamics, 1979, pp. 133-148.
Mullenbach, P. and K.R. Deutenbach, "Influence of Boundary Layer Control Systems on the Flow Field Around Passenger Cars", Journal of Wind Engineering and Industrial Aerodynamics, 1991, pp. 29-45.

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