Experimental Investigation For Slimming Down The Acoustic Level In Commercial Aircraft’s Jet

Abstract

Acoustic Pollution control related researches may consider with high priority as it has high social impact. This paper also addresses such case, deals with the issue of acoustic related pollution by the aircraft. Apart from acoustic which created by the moving parts, the acoustic from the jet of the aircraft is so harm to human. The Passive control is a kind by which, one can suppress the acoustic that generates. Here the passive technique, which employed is use of co-flowing jets. The intensity of acoustic radiation can be reduced by minimizing the reducing Mach number of turbulent eddies. Based on this core idea this investigation proceeded with a predefined bypass ratio and lip thickness of primary nozzle. Near the field a recirculation region is formed by the co-flowing jets with restricted lip thickness. Hence the use of finite lip thickness to suppress the acoustic level is a prime objective of this study. This study the jet discharge investigated with three different emission angles. The results compared with single free jet and a marginal lip thickness case. The proposed flow conditions out performs in acoustic level reduction.