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High-speed jets exhausting from engines, especially during takeoff, remain one of the main sources of external aircraft noise. Regulations on aircraft noise levels in regions close to airports are very strict and are forcing the aerospace industry to develop quieter aircrafts. Mixing enhancement devices at the exit of nozzles, such as chevrons, have assisted in the reduction of noise levels for some...
Passive noise control devices for jet flows, such as chevron nozzles, have been studied for a long time due to their large application in turbofan engines. The main purpose of their usage is the reduction of low-frequency noise generation and thus decreasing the noise perceived at the far field. This work is a numerical study of acoustic noise generated by jet flow operating at Mach number 0.9 and...
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