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ISSN Druckformat: 1948-2590
ISSN Online: 1948-2604
EFFECT OF VORTEX GENERATORS ON THE DIRECTION DIAGRAM OF ACOUSTIC EMISSION OF SUPERSONIC JETS
ABSTRAKT
The results of an experimental study on the influence of two types of vortex generators mounted at the exit of a convergent nozzle on the direction diagram of the acoustic emission of a supersonic under-expanded jet are reported. The vortex generators are chevrons or microjet injectors (six chevrons or six microjets). Both vortex generators are found to suppress the screech tone in jet noise. The effect of jet noise reduction using vortex generators is detected for Strouhal numbers lower than the critical value. For high Strouhal numbers, the noise intensity is found to increase. The value of the critical Strouhal number depends on the observation angle and vortex generator type. The use of a microjet generator leads to uniform reduction of jet noise in the entire range of observation angles. The presence of a chevron vortex generator leads to effective reduction of jet noise only for observation angles close to the jet exhaustion direction.
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Gubanov D. A., Zapryagaev V. I., Kiselev N. P., Kundasev S. G., Aeroacoustic interaction in high-velocity jet with a thin obstacle, 2027, 2018. Crossref
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Zapryagaev Valery, Kiselev Nikolay, Gubanov Dmitry, Shock-Wave Structure of Supersonic Jet Flows, Aerospace, 5, 2, 2018. Crossref
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Gubanov D. A., Kundasev S. G., Trubitsyna L. P., Effect of artificial streamwise vortexes on characteristics of supersonic jet, HIGH-ENERGY PROCESSES IN CONDENSED MATTER (HEPCM 2019): Proceedings of the XXVI Conference on High-Energy Processes in Condensed Matter, dedicated to the 150th anniversary of the birth of S.A. Chaplygin, 2125, 2019. Crossref