CFD ANALYSIS OF RB211AND CFM56 CHEVRON NOZZLES

Authors:

N.MK.Sarath Kumar,A.Vamsi Krishna ,G.Shyam Mahesh,K.Bharath Kumar, M.Venkataiah,

DOI NO:

https://doi.org/10.26782/jmcms.2020.07.00034

Keywords:

Chevrons,Nozzles, Noise,Turbulence,

Abstract

With the increase in advancements in the aerospace industry, the introduction of the concept of the chevron to reduce noise and turbulence has been effective to a certain extent. In the present context, a baseline axisymmetric separate-flow nozzle with standard dimensions is taken into consideration. Then the chevron nozzle represents the conventional chevron nozzle in use today. Noise emission and its intensity have been a major concern for the past few decades. This paper mainly deals with the velocity magnitude and acoustic power level of the four types of nozzles which includes the combination of two nozzles accounting the baseline model and its modification with a set of chevrons. Based on the two results the unprejudiced one is ideal for the airplane.

Refference:

I “America on the Move,” National Museum of American History, Smithsonian Institution, n.d. Web.
II Aizat. “Using Technology to Combat Noise,” Silence, Please – On Noise Pollution, Blog Post, Centre for Instructional Technology, National University of Singapore, 13 Oct. 2016. Web.
III Janardan, B.A., Hoff, G.E., Barter, J.W., Martens, “AST Critical Propulsion and Noise Reduction Technologies for Future Commercial Subsonic Engines: Separate-Flow Exhaust System Noise Reduction Concept Evaluation,” NASA CR 2000-210039, 2000.
IV Krothapalli, A., Venkatakrishnan, L., Elavarasan, R., and Lourenco, L., Supersonic jet noise suppression by water injection, 2000, AIAA-2000-2025.
V MunipallyPrathibha, CFD Analysis on a Different Advanced Rocket Nozzles, August 2015, pp. 14–22.
VI SunayanMullick, Impact Of New Chevron Configurations On Mixing Enhancement In Subsonic Jets, 26 Apr 2016. Web.

View Download