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An Analytical Method for Ditching Analysis of an Airborne VehicleA simple analytical method has been introduced for aerohydrodynamic load analysis of an airborne configuration during water ditching. The method employs an aerodynamic panel code, based on linear potential flow theory, to simulate the flow of air and water around an aircraft configuration. The free surface separating the air and water region is represented by doublet sheet singularities. Although all the theoretical load distributions are computed for air, provisions are made to correct the pressure coefficients obtained on the configuration wetted surfaces to account for the water density. As an analytical tool, the Vortex Separation Aerodynamic (VSAERO) code is chosen to carry out the present investigation. After assessing the validity of the method, its first application is to analyze the water ditching of the Space Shuttle configuration at a 12 degree attitude.
Document ID
19880005586
Acquisition Source
Langley Research Center
Document Type
Contractor Report (CR)
Authors
Farhad Ghaffari
(ViGYAN (United States) Hampton, Virginia, United States)
Date Acquired
September 5, 2013
Publication Date
February 1, 1988
Publication Information
Publisher: National Aeronautics and Space Administration
Subject Category
Aerodynamics
Report/Patent Number
NAS 1.26:4120
NASA-CR-4120
Accession Number
88N14968
Funding Number(s)
CONTRACT_GRANT: NAS1-17919
PROJECT: RTOP 505-60-21-02
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Linear potential flow
Incompressible
Ditching
Space Shuttle
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