منابع مشابه
Transonic Drag Prediction Using an Unstructured Multigrid Solver
This paper summarizes the results obtained with the NSU3D unstructured multigrid solver for the AIAA Drag Prediction Workshop held in Anaheim, CA, June 2001. The test case for the workshop consists of a wing-body con guration at transonic ow conditions. Flow analyses for a complete test matrix of lift coe cient values and Mach numbers at a constant Reynolds number are performed, thus producing ...
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Adaptive airfoils and wings can provide superior performance at the expense of increased cost and complexity. In this paper, an aerodynamic optimization algorithm is used to assess an adaptive airfoil concept for drag reduction at transonic speeds. The objective is to quantify both the improvements in drag that can be achieved and the magnitude of the shape changes needed. In an initial study, ...
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This paper discusses the use of control theory for optimum design of aerodynamic configurations. Examples are presented of the application of this msethod to the reduction of shock induced pressure drag on airfoils in two-dimensional transonic flow.
متن کاملAnalysis of Interference Drag for Strut-Strut Interaction in Transonic Flow
Computational Fluid Dynamics (CFD) simulations were performed to predict the interference drag produced by two streamlined struts intersecting at various angles in transonic flow since no relevant experimental data are available for use in design studies. The one-equation Spalart-Allmaras turbulence model was employed in a RANS formulation assuming fully-turbulent flow. Selected cases were run ...
متن کاملThePressure-Drag due to Blunt Leading Edges on Two-Dimensional Aerofoils, at Transonic and Low-Supersonic Speeds
Pressure drags, obtained from measured pressure distributions in the transonic and low-supersonic speed range, are compared for sharp and blunt leading-edged two-dimensional aerofoils. For the special blunt shapes considered here, the high pressures in the stagnation-point region are offset by low pressures generated further round on the leading edge and on the basic aerofoil itself. The result...
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ژورنال
عنوان ژورنال: ANZIAM Journal
سال: 2019
ISSN: 1445-8810
DOI: 10.21914/anziamj.v59i0.13408