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http://dx.doi.org/10.7776/ASK.2014.33.3.153

Empirical Prediction of Acoustic Load of Launch Vehicle Including Jet Impingement  

Park, Seoryong (서울대학교 기계항공공학부)
Lee, Kyuho (서울대학교 기계항공공학부)
Kong, Byunghak (서울대학교 기계항공공학부)
Kang, Kyung Tai (서울대학교 기계항공공학부)
Jang, Seokjong (서울대학교 기계항공공학부)
Lee, Soogab (서울대학교 공학연구소)
Publication Information
The Journal of the Acoustical Society of Korea / v.33, no.3, 2014 , pp. 153-162 More about this Journal
Abstract
Empirical prediction method of the acoustic load on the fairing is based on jet experimental data on the basis of similarity principle. Representative empirical prediction method, DSM-II(Distributed Source Method-II), is a distributing source method along the jet plume. But the empirical prediction model is limited to reflect the impingement source in real environment because it is based on the free jet data. So, we propose a empirical prediction method considering the impinging jet effect by adding a impingement source in the existing prediction method. Considering the additional source's displacement, spectrum, strength and directivity, we calculate the acoustic load on the KSR-III(Korean Sounding Rocket-III) rocket and compare the results with the existing method and experiment data.
Keywords
Launch vehicle; Acoustic load; Empirical prediction method; Impinging jet; Acoustic power spectrum;
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