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http://dx.doi.org/10.7776/ASK.2020.39.4.331

Design of launch pad for mitigating acoustic loads on launch vehicle at liftoff  

Tsutsumi, Seiji (Japan Aerospace Exploration Agency)
Publication Information
The Journal of the Acoustical Society of Korea / v.39, no.4, 2020 , pp. 331-341 More about this Journal
Abstract
At liftoff, launch vehicles are subject to harmful acoustic loads due to the intense acoustic waves generated by propulsion systems. Because these waves can cause electronic and mechanical components of launch vehicles and payloads to fail, predicting and mitigating acoustic loads is an important design issue. This article presents the latest information about the generation of acoustic waves and the acoustic design methods applicable to the launch pad. The development of the Japanese Epsilon solid launcher is given as an example of the new methodology for launch pad design. Computational fluid dynamics together with 1/42 scale model testing were performed for this development. Effectiveness of the launch pad design to reduce acoustic loads was confirmed by the post-flight analysis.
Keywords
Launch vehicle; Aeroacoustics; Computational fluid dynamics; Computational aeroacoustics;
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