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http://dx.doi.org/10.6108/KSPE.2013.17.6.089

Computational Study of Supersonic Chevron Ejector Flows  

Kong, Fanshi (School of Mechanical Engineering, Andong National University)
Kim, Heuy Dong (School of Mechanical Engineering, Andong National University)
Jin, Yingzi (College of Mechanical Engineering & Automation, Zhejiang Sci-Tech University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.17, no.6, 2013 , pp. 89-96 More about this Journal
Abstract
Considering the complexity and difficulty on the researching, how to enhance the performance of ejector-diffuser system effectively became a significant task. In the present study, the supersonic nozzle was redesigned using Chevrons installed at the inlet of the secondary stream of the ejector-diffuser system for the purpose of the performance improvement. A CFD method based on Fluent has been applied to simulate the supersonic flows and shock waves inside the ejector. Primary numerical analysis results show that the Chevrons get a positive effect on the ejector flows. The comparison of ejector performance with and without the Chevron was obtained and optimal number of chevron lobe is discussed to increase the performance. The ejector-diffuser system performance is discussed in terms of the entrainment ratio, pressure recovery as well as total pressure loss.
Keywords
Ejector-Diffuser System; Chevron Nozzle; Shock Wave; Compressible Flow; Supersonic Flow;
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