Approximate Indicial Lift Function for Tapered, Swept Wings in Incompressible Flow PDF Download
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Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781725686113 Category : Languages : en Pages : 34
Book Description
An approximate indicial lift function associated with circulation was developed for tapered, swept wings in incompressible flow. The function is derived by representing the wings with a simple vortex system. The results from the derived equations compare well with the limited available results from more rigorous and complex methods. The equations, as derived, are not very convenient for calculating the dynamic response of aircraft, parameter extraction, or for determining frequency-response curves for wings. Therefore, an expression is developed to convert the indicial response function to an exponential form which is more convenient for these purposes. Queijo, M. J. and Wells, W. R. and Keskar, D. A. Langley Research Center NASA-TP-1241, L-12110 RTOP 505-06-63-02...
Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781725686113 Category : Languages : en Pages : 34
Book Description
An approximate indicial lift function associated with circulation was developed for tapered, swept wings in incompressible flow. The function is derived by representing the wings with a simple vortex system. The results from the derived equations compare well with the limited available results from more rigorous and complex methods. The equations, as derived, are not very convenient for calculating the dynamic response of aircraft, parameter extraction, or for determining frequency-response curves for wings. Therefore, an expression is developed to convert the indicial response function to an exponential form which is more convenient for these purposes. Queijo, M. J. and Wells, W. R. and Keskar, D. A. Langley Research Center NASA-TP-1241, L-12110 RTOP 505-06-63-02...
Author: Joseph A. Drischler Publisher: ISBN: Category : Air flow Languages : en Pages : 26
Book Description
The unsteady-lift functions for a wing undergoing a sudden change in sinking speed have been presented for delta wings having aspect ratios of 0, 2, and 4 and for rectangular and elliptical wings having aspect ratios of 0, 3, and 6. For the elliptical and rectangular wings the spanwise lift distributions were also presented. These functions were calculated from the lift coefficients associated with a wing oscillating harmonically in pure translational motion, as obtained from several sources.
Author: Mehdi Ghoreyshi Publisher: MDPI ISBN: 3038976105 Category : Technology & Engineering Languages : en Pages : 294
Book Description
Currently, the use of computational fluid dynamics (CFD) solutions is considered as the state-of-the-art in the modeling of unsteady nonlinear flow physics and offers an early and improved understanding of air vehicle aerodynamics and stability and control characteristics. This Special Issue covers recent computational efforts on simulation of aerospace vehicles including fighter aircraft, rotorcraft, propeller driven vehicles, unmanned vehicle, projectiles, and air drop configurations. The complex flow physics of these configurations pose significant challenges in CFD modeling. Some of these challenges include prediction of vortical flows and shock waves, rapid maneuvering aircraft with fast moving control surfaces, and interactions between propellers and wing, fluid and structure, boundary layer and shock waves. Additional topic of interest in this Special Issue is the use of CFD tools in aircraft design and flight mechanics. The problem with these applications is the computational cost involved, particularly if this is viewed as a brute-force calculation of vehicle’s aerodynamics through its flight envelope. To make progress in routinely using of CFD in aircraft design, methods based on sampling, model updating and system identification should be considered.
Author: Publisher: ISBN: Category : Aeronautics Languages : en Pages : 730
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: National Aeronautics and Space Administration (NASA)
Author: National Aeronautics and Space Administration (NASA)
Author: M. J. Queijo
Author: M. J. Queijo
Author: M.J. Queijo
Author: M. J. Queijo
Author: United States. National Aeronautics and Space Administration
Author: 
Author: Joseph A. Drischler
Author: Mehdi Ghoreyshi
Author: