Abstract
Large-Eddy Simulation of high subsonic jet with microjet injection was performed using UPACS-LES code which is developed in JAXA. Large scale (476M grid point) simulation was executed on JAXA Supercomputer System using 980 processors. The result shows good agreement with the experimental data in terms of velocity fluctuation and far-field noise level. Far-field noise prediction using FW-H method from the LES results show that the LES successfully predict noise reduction by microjets for lower frequency component emitted in 30 deg. observation angle, while it still has difficulty in predicting reduction of higher frequency noise emitted in 90 deg. observation angle.
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