Find a library where document is available. Supersonic linear theory suggests that the zero- lift wave-drag (CO,) of a delta wing varies as the airfoil thickness-to-chord ratio squared (.r2) and as the wing aspect ratio (A) for a given airfoil pro- file. UIUC Airfoil Coordinate Database coordinates for nearly 1,600 airfoils John Dreeses NACA airfoil coordinate generation program Works on Windows XP, 7 and 8. Furthermore, the authors investigate the effectiveness of the variable-fidelity technique in terms of speed and design quality using several combinations of medium-fidelity and low-fidelity models. This thesis examines the supersonic performance of a NACA 66-206 airfoil. The NACA airfoil series is a set of standardized airfoil shapes developed by this agency, which became widely used in the design of aircraft wings. (nasasc2-0714-il) SC (2)-0714 Supercritical airfoil (coordinates from Raymer w/ one correction) NASA SC (2)-0714 airfoil (Ref. A diamond-wedge airfoil is a specific type of airfoil shape used in. These designs focus on minimizing wave drag and optimizing the achievable lift-to-drag ratios. Supersonic channel airfoil design techniques have been shown to significantly reduce drag in high-speed flows over diamond shaped airfoils by Ruffin and colleagues. Compared with direct optimization, the results show that an order of magnitude speed up can be obtained. The best supersonic airfoil designs are thin, mildly cambered airfoils with specific thickness distributions and curvature to manage shock waves and regions of flow expansions. The effectiveness of the approach is investigated using lift-constrained drag minimization problems of supersonic airfoil shapes. By using response correction techniques, in particular, the manifold mapping technique, fast surrogate models are constructed. Variable-fidelity models are generated using inviscid computational fluid dynamics simulations and analytical models. This paper presents results of numerical investigations of using physics-based surrogate models to design supersonic airfoil shapes. Analysis of these vehicles requires the use of accurate models, which are also computationally expensive, to capture the highly nonlinear physics. Supersonic vehicles are an important type of potential transports. Janes All The Worlds Aircraft has been a good source of this information, but in many cases (particularly military aircraft) it. Frequently, the question arises as to what airfoil or airfoils were used in the wing design of a particular aircraft. Supersonic Airfoil Shape Optimization by Variable-fidelity Models and Manifold Mapping David LednicerAeromechanical Solutions LLC15219 NE 71st CourtRedmond, WA.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |