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ARTICULATING BASE FLAPS FOR AERODYNAMIC BASE DRAG REDUCTION AND STABILITY OF A BLUFF BODY VEHICLE

United States Patent Application

20100106380
A1
View the Complete Application at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
An aerodynamic base drag reduction and stability control apparatus and method uses a plurality of articulable base flaps each hingedly connected near one of a left side edge, a right side edge, a top side edge, and a bottom side edge of a rear end base of a vehicle so that each of the base flaps have a corresponding range of motion between a first position subject to direct impingement by a free stream adjacent the vehicle in motion and a second position not subject to direct impingement by the free stream. And a controller independently actuates the base flaps to corresponding desired positions relative to the free stream and within the corresponding ranges of motion to produce a desired combined aerodynamic drag reducing and/or stabilizing effect on the vehicle in motion.
Salari, Kambiz (Livermore, CA), Ortega, Jason M. (Pacifica, CA)
12/ 608,914
October 29, 2009
FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] The United States Government has rights in this invention pursuant to Contract No. DE-AC52-07NA27344 between the United States Department of Energy and Lawrence Livermore National Security, LLC for the operation of Lawrence Livermore National Laboratory.