Numerical analysis on a constant rate of kinetic energy change based a two-stage ejector-diffuser system

Sethi, Virendra Kumar (author), Kumar, Anil (author), Kumar Yadav, Surendra (author), Yadav, Anshul (author), Prasad, Lalta (author), Winczek, Jerzy Adam (author)

Supersonic ejector energy flow devices are extensively used in various applications, such as pumping, mixing, compression, etc. The conventional single-stage ejector (SSE) design approaches are inefficient for modelling an efficient ejector because of their inefficiency in minimizing mixing losses in the mixing chamber, thermodynamic shock in constant area diffuser, and utilization of redundant discharged momentum at the exit of the first stage. The physics-based single-stage ejector design has better solutions because it minimizes irreversibility due to thermodynamic shocks. The present study utilizes the constant rate of a kinetic energy change physics-based approach to design a two-stage ejector (TSE) for water vapour. The computational fluid dynamics (CFD) tool ANSYS-Fluent has been utilized to predict flow characteristics. The performance of the ejector-diffuser system has also been compared with a single-stage ejector. It is found that the performance of TSE is 70 % higher than that of the performance of SSE.

• Language: English
• Keywords: ejectors, CRKEC, two-stage ejectors, single-stage ejectors, CFD
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Publication date: 01.01.2022
• Year: 2022
• Number of pages: Str. 368-373
• Numbering: Vol. 68, no. 5
• PID: 20.500.12556/RUL-137289
• UDC: 621.527
• ISSN on article: 0039-2480
• DOI: 10.5545/sv-jme.2021.7538
• COBISS.SI-ID: 111047427
• Publication date in RUL: 09.06.2022

Record is a part of a journal

• Title: Strojniški vestnik
• Shortened title: Stroj. vestn.
• Publisher: Zveza strojnih inženirjev in tehnikov Slovenije [etc.], = Association of Mechanical Engineers and Technicians of Slovenia [etc.
• ISSN: 0039-2480
• COBISS.SI-ID: 762116

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 28.03.2022

Secondary language

• Language: Slovenian
• Title: Numerična analiza sistema dvostopenjskega ejektorja-difuzorja na osnovi konstantne hitrosti sprememb kinetične energije
• Keywords: ejektorji, CRKEC, dvostopenjski ejektorji, enostopenjski ejektorji, CFD, curkovne črpalke, CRM