Full-Field Sonic Boom Simulation in Real Atmosphere

Abstract

As the sonic boom prediction method, the usefulness of the full-field simulation, in which the whole flow field including both the zone around a supersonic body and that on the ground is analyzed as a single computational domain, is assessed in this paper. The three dimensional Euler analyses including the gravity term have been numerically conducted to take into account the variation of the atmospheric properties with the altitude. The solutionadaptive structured grids are constructed by advancing the computational domain sector by sector for the grid lines to be aligned with the shock wave surfaces. The computations are made to reproduce the D-SEND#1 flight test by Japan Aerospace Exploration Agency (JAXA). The computational results are validated by comparing with the results of the waveform parameter method and the flight test data taken from the D-SEND database provided by JAXA. The maximum pressure rises of the present full-field simulations agree well with those of the waveform parameter method and the flight test data. Consequently, the present full-field simulations seem promising to analyze the natures of the sonic boom propagation in the realistic atmosphere model.