Numerical investigation of mixing characterstics of chevron nozzle by passive controls method

Frontiers in Automobile and Mechanical Engineering

Devipriya, J.^1 ; Kanimozhi^1

Department of Mechanical Engineering, Sathyabama University, India^1

关键词: Aircraft exhausts;    CFD softwares;    Chevron nozzle;    Free jets;    Mixing characteristics;    Numerical investigations;    Passive control;    Thrust loss;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/197/1/012082/pdf
DOI  :  10.1088/1757-899X/197/1/012082

来源: IOP

【 摘 要 】

This paper deals with the Reduction of noise in the aircraft exhaust is done by installing Chevrons with particular parameters in the Nozzle section. Numerical investigations have been carried out on chevron Nozzles to evaluate the importance of Chevron parameters by adding number of Chevrons and the mixing characteristics of jet. After assessing the Chevron parameters we vary the Chevron shapes at the exit by installing the triangular wedge in order to regulate maximum noise reduction along with a negligible thrust loss. Finally the results is compared with free jet Nozzle with Chevron and Chevron with wedge has been analysed using CFX CFD software and the results of potential core decay of these Nozzles has been measured from the analysis.