24-10-2012, 12:59 PM
Detached Eddy Simulation of Film Cooling over a GE Flat Plate
ABSTRACT
The detached eddy simulation of film cooling has been utilized for a proprietary GE plate-pipe configuration. The blowing
ratio was 2.02, the velocity ratio was 1.26, and the temperature ratio was 1.61. Results indicate that the mixing processes
downstream of the hole are highly anisotropic. DES solution shows its ability to depict the dynamic nature of the flow and
capture the asymmetry present in temperature and velocity distributions. Further, comparison between experimental and DES
time-averaged effectiveness is satisfactory. Numerical values of span-averaged effectiveness show better prediction of the
experimental values at downstream locations than a steady state Glenn HT solution. While the DES method shows obvious
promise, there are several issues that need further investigation. Despite an accurate prediction in the hole vicinity, the
simulation still falls short in the region x = 10d to 100d. This should be investigated. Also the model used flat plate. Actual
turbine blade should be modeled in the future if additional finding is available.