Affiliation:
1. Northwestern Polytechnical University
Abstract
Sonic boom suppression method is the key technology of next generation supersonic aircraft. Low boom mechanism of the off-body energy deposition is analyzed by using the thermal chocking model. The mass flux of energy deposition region is small than no energy deposition region, and off-body energy deposition will induce a bow shock wave. The mechanism of off body energy deposition is similar with quiet spike, so it can be regard as a virtual quiet spike. Off-body energy deposition analysis software is developed based on CFD, waveform parameter method and NSGA-II genetic algorithm. The location coordinate, value, shape and location number of energy deposition are the key parameters in low boom design. Initial pressure of optimized energy deposition decrease near about 54.65 than no energy deposition, and rise time increase 543.2%.
Publisher
Trans Tech Publications, Ltd.
Reference11 articles.
1. Seongim Choi, Juan J.A. Multi-fidelity design optimization of low boom supersonic jets. Journal of aircraft, 2008, 45(1): 106-118.
2. Seebass A R. Sonic boom theory. Journal of Aircraft, 1969, 6(13): 177-184.
3. Wu Li, Karl Geiselhart. Mixed fidelity approach for design of low boom supersonic aircraft. Journal of aircraft, 2011, 48(4): 1131-1135.
4. Donald C Howe. Development of the gulfstream quiet spike for sonic boom minimization. AIAA-2008-0124, (2008).
5. Richard B Miles, Luigi Martinelli, Sergey O Macheret. Suppression of sonic boom by dynamic off body energy deposition and shape optimization. AIAA-2002-0150, (2002).