This paper represents the results from the initial phase of a research program to determine the flow characteristics of the C-130 Hercules transport aircraft. The initial phase of the program consists of evaluation and comparison of the flow-field obtained from flow visualization methods. Specifically CFD (Computational Fluid Dynamics) results are compared with experimental Hot Wire results produced by wind tunnel tests on the C-130 in clean configuration. This paper outlines the results to date and provides a description of further work. The CFD element of this research features the use of Detached Eddy Simulation (DES) in order to extend its use as a reliable method for use on complex flow-fields. DES combines the efficiency of a Reynolds-averaged turbulence model near the wall with the fidelity of LES (Large Eddy Simulation) in separated regions. Because of the LES treatment in separated regions, it provides more accurate descriptions of the geometry-dependant, three-dimensional unsteady motions resulting in regions of massive separation. The computational aspect of the research is performed at the US Air Force Academy, with subsequent wind tunnel tests (Hot Wire) being undertaken in France at ENSICA.


Aerospace Engineering



URL: http://digitalcommons.calpoly.edu/aero_fac/30