Influence of Quiet Spike on Supersonic Transport for Low Boom Effect

• Format: Article
• Language: zho
• Published: The Northwestern Polytechnical University 2019-02-01
• Series: Xibei Gongye Daxue Xuebao
• Subjects: sonic boom prediction; supersonic civil transport; quiet spike; waveform parameter method
• Online Access: https://www.jnwpu.org/articles/jnwpu/full_html/2019/01/jnwpu2019371p203/jnwpu2019371p203.html

One of the biggest technical challenges of supersonic flight is the mitigation of sonic boom. To deal with this problem, the Gulfstream Aerospace Corporation came up with the spike concept, and it showed to be efficient. However, there also remain several problems, the first one is that installing the spike makes it harder to balance for supersonic transport and the another one is that the movement equipment is complex. In this paper, a new concept by replacing the multi-stage of the normal spike with smooth transistion cones is proposed. The concept simultaneously uses the CFD solver HUNS3D based on the Reynolds average (RANS) equation and the far-field FL-BOOM sound explosion propagation program based on Thomas waveform parameter method. The effectiveness of the present scheme to suppress supersonic aircraft sound explosion is verified according to the concept. It is proved that the increased length is good for low blast and the main factor affecting the blast reduction effect of multistage mute cone is length rather than series by the analysis. The results have important reference value for the silent cone design of supersonic aircraft.