An Efficient, Unstructured Flow Solver for Complex Aircraft Configurations in Maneuvering Flight

Period of Performance: 03/26/1997 - 03/26/1999

$642K

Phase 2 SBIR

Recipient Firm

Aerosoft, Inc.
2000 Kraft Drive Suite 1400
Blacksburg, VA 24060
Principal Investigator

Research Topics

Abstract

Aerosoft proposes the development of efficient and accurate Computational Fluid Dynamics methods simulating the flow-field about and through complex bodies with time-varying geometries. Our approach combines the geometric flexibility offered by an unstructured methodology with the time-dependent, Reynolds-Averaged, Navier-Stokes equations which have been augmented to allow for dynamic meshes as well as non-equilibrium chemistry and theromodynamics. The dynamic-mesh approach proposed here is based on a dual time-stepping algorithm with parallel, implicit, time-integration schemes, and time-dependent metrics which satisfy the Geometric Conservation Law. The development of such a software package would impact the design of modern aircraft and would be applicable to a wide range of simulations, such as store release from military aircraft, aircraft with moving control surfaces, retracting landing gear, space shuttle-booster separation, and variable geometry inlets, combustors, and nozzles. Also of considerable interest is improving the efficiency of steady-state simulations. AeroSoft proposes incorporating innovative solution adaptive remeshing techniques into the unstructured CFD package. Combined with the existing, parallel, implicit, time-integration schemes and higher-order reconstruction, this will provide a valuable tool for obtaining efficient and accurate steady-state solutions to a wide variety of problems.