抄録
The three-dimensional time dependent compressible Navier-Stokes equations are numerically solved to study acoustic emission nature in a supersonic round jet at high convective Mach number (M=2.0) using high-order compact upwind schemes. The numerical results provide new physical insights into Mach wave generation nature in a supersonic round jet. Upstream disturbance conditions play an important role for the emission of the Mach waves in a supersonic jet. The numerical results show that the jet forced with a pair of first helical modes can restrict emission angle of Mach wave due to the modes interference.
