Sonic Boom Prediction Using Multi-Block Structured Grids CFD Code Considering Jet-On Effects

CFD analyses with multi-block structured grids code are conducted in order to verify the low-boom design of the silent supersonic technology demonstrator airplane. The grid sensitivity study is conducted for high fidelity near-field pressure signature simulation to predict the sonic boom signature on the ground and an efficient fine computational mesh is determined through the study. Furthermore, the effects of the jet plume on sonic-boom are investigated through some jet-on simulations using the fine mesh. Direct effects of the jet plume on sonic-boom blow the airplane is relatively small compared to its indirect effects of changing aerodynamic forces and design angle-of-attack.