Comparison of numerical simulation to existing experimental data involving downwash wake reduction for the V-22 Osprey.

摘要

It is of interest to develop numerical techniques to simulate the implementation of blowing slots on a V-22 Osprey airfoil in order to alleviate downwash. In order to develop these techniques, two separate experiments were simulated and the numerical results were compared with the experimental data. The first experiment used in comparison was performed by Fort F. Felker at the NASA's AMES Research Center in 1990. The second experiment was done by Chad Riba and Gerald M. Angle at West Virginia University in 2003.; The commercially available RNG k-e turbulence model with enhanced wall treatment found in Fluent 6.1 was used to solve the flows. The solutions were then compared to experimental data. Good correlation between the computational and experimental data was found. Similar to what was found in the WVU experiment, download on the wing from the rotors while the aircraft is operating in vertical take-off and landing mode was found to be reduced by the blowing slots. The difference between the percent download reduction in the WVU experiment and the computational model was found to be approximately 3%.