Accession Number:

ADA317839

Title:

Unsteady Subsonic Aerodynamics for Maneuvering Wing/Fuselage/Pylon/Store Configuration and Store Separation Including Wake Effects.

Descriptive Note:

Progress rept.,

Corporate Author:

TECHNICAL UNIV OF ISTANBUL (TURKEY) FACULTY OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s):

Report Date:

1993-04-01

Pagination or Media Count:

129.0

Abstract:

The goal of the present investigation is to characterize the instantaneous flow field and force characteristics for a wingfuselagepylonexternal store system during steady and unsteady flight. Emphasis is placed on practical. cost-effective engineering solution for the short-term treatment of the problem rather than an elegant mathematical modeling for the longer terms. Application of a Nonlinear Vortex Lattice Method NVLM Computational Fluid Dynamics CFD system with unsteady free wake formulation to obtaining flow field predictions about a maneuvering wingpylonstore configuration is the primary objective of the current investigation. Separation the external store under the influence of unsteady wake roll up behind wing will be modeled by considering the full mutual interactions between the store and wingpylon system in the second phase of the project. In this report, preliminary results were presented regarding the unsteady flow field below the wing about the external store and the unsteady aerodynamic forces on the external store before the separation during flight maneuvers. The validation of the computer modeling approach for the maneuvering wingpylonstore combination needs experimental data. Unfortunately, the comparison experimental data were not available for the current research configuration and conditions. The experimental unsteady wing flow field and stability derivatives literature data was considered as the basis to test the accuracy and effectiveness of the computer code.

Subject Categories:

  • Aerodynamics
  • Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE