Les analysis of transverse jet mixing in supersonic free-stream turbulence

Yasunori Nagata, Seitaro Yokoi, Rei Aoki, Toshinori Kouchi, Shinichiro Yanase

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In the engine combustion test using the hypersonic wind tunnel facility, high temperature, high pressure, and high velocity flow is generated by combustion heating upstream of the nozzle. However, in this process, the turbulence of the flow and the contamination by the combustion gas occur unavoidably. Therefore, it is a concern that the different situation is observed between the ground test and actual flight because of these unavoidable factors. In this study, we focus on the mixing process of the injected fuel and the free-stream and aim to numerically evaluate the influence of the free-stream turbulence on the jet mixing. The LES calculation with free-stream turbulence is performed by the inflow boundary condition applying the velocity, temperature, and pressure fluctuations based on the Random Flow Generation (RFG) method, strong Reynolds analogy (SRA), and an isentropic process. The input parameter for RFG can control the generated free-stream turbulence characteristic inside the calculation domain. The difference between the cases with and without free-stream turbulence, whose intensity is up to 2.2% of mean free-stream velocity, is not observed clearly on the mean and instantaneous value fields in the present calculation.

Original languageEnglish
Title of host publicationAIAA Scitech 2020 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Number of pages11
ISBN (Print)9781624105951
Publication statusPublished - 2020
EventAIAA Scitech Forum, 2020 - Orlando, United States
Duration: Jan 6 2020Jan 10 2020

Publication series

NameAIAA Scitech 2020 Forum
Volume1 PartF


ConferenceAIAA Scitech Forum, 2020
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Aerospace Engineering


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