A Computer Code (USPOTF2) for Unsteady Incompressible Flow Past Two Airfoils
Abstract
A numerical code, USPOTF2, has been formulated to solve the potential flow for two airfoils executing unsteady motions is an inviscid incompressible flow medium. This code is an extension of an existing code U2DIIF, which does the same calculations for the single airfoil case. The technique uses the well known Panel Methods for steady flow and extends it to unsteady flow by introducing a wake model which creates a non-linear problem due to the continuous shedding of vortices into the trailing wake. The presence of the second airfoil introduces a set of non-linear coupled equations for the Kutta condition. Numerous case-runs are presented to illustrate the capability of the code. The case of the step change in angle of attack is compared with Giesing's work. All other case-runs are illustrated together with the results for the single airfoil case.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1988
- Accession Number
- ADA201671
Entities
People
- Chunk-kiang Pang
Organizations
- Naval Postgraduate School