Abstract:
Sonic boom is one of the key issues for research and development of supersonic civil airlines. In the past years, plenty of numerical simulations and wind tunnel tests have been performed, which make the researchers have a certain understanding of its mechanism. However, the flight measurement data are in scarcity both at home and abroad, which seriously restricts the development of sonic boom prediction and reduction techniques. Based on the scientific flight experiment aircraft of "Star of Chongqing Liangjiang" with No. OS-X0, the flight measurement of sonic boom was performed by AVIC Aerodynamics Research Institute (AVIC ARI). The sonic boom signature on the ground after a long distance propagation in the real atmosphere environment is captured by the flight measurement system developed by AVIC ARI, and the measured data has been analyzed by the ARI_Boom in-house code. The numerical results are in reasonably agreement with the flight test data, although there exists some discrepancy due to the fact that many factors in the real atmosphere environment have influences on the sonic boom level. To improve the agreement, the sonic boom theory and prediction methods as well as the flight measurement system need to be improved.