Cfd Validation Study of Nexst-1 near Mach 1
نویسندگان
چکیده
Development of a next generation airplane, which cruises near sonic speed, received considerable attention in 2002. To investigate aerodynamic characteristics and validity of CFD codes as a design tool in this new cruise condition, detailed wind tunnel test and CFD validation study was conducted in near sonic regime about the NEXST-1, unpowered supersonic experimental vehicle as a cooperative research program between JAXA (Japan Aerospace Exploratory Agency) and MHI (Misubishti-Heavy Industries, Ltd.). The intensive CFD study showed satisfactory agreement with WTT results in general, even near sonic speed. It was found an airplane with very thin airfoil tended to have a drag dip at moderate (cruise) lift condition in high transonic region due to its less wave drag increase. It was also found the dip was overpredicted in the wind tunnel test due to the buoyancy effects induced by wind tunnel wall and sting for model support.
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