Semiempirical assessment of acoustic loads on the rocket head with a non-standard configuration of launch facilities
Keywords:acoustic loads, supersonic jet, launch facilities, semiempirical technique
The paper deals with assessing the acoustic loads on the surface of a launching rocket obtained using the semiempirical technique NASA SP-8072 adapted for a launch pad located above the water area. The features of the launch facilities include the reduced length of the gas duct and the presence of a wedge-shaped gas-dynamic deflector divided into two symmetrical oppositely directed slopes. The calculations are made with the allowance for the limited length of the rocket jet's laminar core during take-off due to interaction with the gas-dynamic deflector. A corrected dependence is used for the overall acoustic energy distribution along the supersonic jet for the first time in domestic practice. The contributions of the sound sources associated with different jet sections and acoustic reflection from the water surface are assessed, depending on the current height of the rocket lift. A significant dependence of the resulting acoustic field around the rocket head on the length of the horizontal section of the gas duct is noted.
Pages of the article in the issue: 84 - 87
Language of the article: Ukrainian
FFOWCS WILLIAMS, J. E. (1963) The noise from turbulence convected at high speed. Philosophical Transactions of the Royal Society of London. Series A. 255 (1061). pp. 469-503.
ELDRED, K. M. (1971) Acoustic loads generated by the propulsion system (TR NASA-SP-8072). Washington, DC: NASA.
HAYNES, J. & KENNY, R. (2009) Modifications to the NASA SP-8072 distributed source method II for Ares I lift- off environment predictions. In 15th AIAA/CEAS Aeroacoust. Conf. (30th AIAA Aeroacoust. Conf.), Miami: AIAA. 35 p.
GEE, K. L. (2021) A tale of two curves and their influence on rocket and supersonic jet noise research. The Journal of the Acoustical Society of America. 149 (4). pp. 2159-2162.
SMITH, W. O. III. (2013) An empirical and computational investigation into the acoustical environment at the launch of a space vehicle (PhD thesis). Auburn, AL: Auburn University.
How to Cite
Copyright (c) 2023 T. Ya. Batutina, V. N. Oliynik
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).