Numerical Simulation of Dynamic Stall
Small Business Information
Ecodynamics Research Associate
P.O. Box 9229, Albuquerque, NM, 87119
Dr. Kambiz Salari
AbstractThe objective of the proposed program is to develop, demonstrate and validate a three-dimensional, time-dependent, compressible Navier-Stokes program for predicting dynamic stall. The foundation of the program is an existing 3-D program that has been developed under prior SBIR funding for retreating-blade dynamic stall on modern high-performance helicopter rotors. The program will be improved in four significant ways. First, capability for dynamic adaptive grid generation will be incorporated in the program. Second, an optimum second-order closure model will be selected for inclusion in the program. Third, a rational method will be devised to predict the onset of transition to turbulence, including initial conditions for a turbulence-model computation through transition and into the turbulent regime. The revised code will bed exercised (using its currently implemented two-equation turbulence model) for a two-dimensional geometry for both deep- and light-stall conditions. Fourth, advances in the solution algorithm will be incorporated, including nonlinear multigrid, TVD, higher-order advective differencing, and true periodicity across the c-c grid. The Phase II code will include the new transition/turbulence models and will be exercised for three-dimensional problems.
* information listed above is at the time of submission.