Unsteady panel method for flows with multiple bodies moving along various pathsA potential flow based three-dimensional panel method was modified to treat time dependent conditions in which several submerged bodies can move within the fluid along different trajectories. This modification was accomplished by formulating the momentary solution in an inertial frame-of-reference, attached to the undisturbed stationary fluid. Consequently, the numerical interpretation of the multiple-body, solid-surface boundary condition and the viscous wake rollup was considerably simplified. The unsteady capability of this code was validated by comparing computed and experimental results for a finite wing undergoing pitch oscillations. In order to demonstrate the multicomponent capability, computations were made for two wings following closely intersecting paths (e.g., to avoid mid air collisions) and for a flow field with relative rotation (e.g., helicopter-rotor/fuselage interaction). Results were compared to experimental data when such data was available.
Document ID
19930040758
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Richason, Thomas F. (NASA Ames Research Center Moffett Field, CA, United States)
Katz, Joseph (San Diego State Univ. CA, United States)
Ashby, Dale L. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AIAA PAPER 93-0640
Meeting Information
Meeting: AIAA, Aerospace Sciences Meeting and Exhibit