Numerical Study of Water-Air Ejector Using Mixture and Two-Phase Models

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نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_IJE-35-2_006

تاریخ نمایه سازی: 7 آذر 1400

Abstract:

In this research, steady-state Mixture and Eulerian-Eulerian method for liquid-gas parallel flow ejector have been examined. The simulation demonstrated that the Mixture model simulation represents better and efficient. The Eulerian-Eulerian model needed longer computational time and had a complexity to achieve the optimal convergence. However, both methods' performances were shown slightly similar. The models indicated a difference of about ۶% in the flow rate ratio, their pressure diagrams nearly coincide, and their velocity parameter varies by ۷% by comparing to the existing experimental data. Additionally, the Mixture model results appropriately conformed much better to the experimental data. So, the Mixture model was chosen for futher parametric study. Simulation results indicated that the flow rate ratio decreases by increasing the throat's cross-sectional area, and the flow rate ratio increases by increasing the nozzle's cross-sectional area. In this regard, e.g., the flow rate ratio of ejector by increasing pressure from ۷۰ to ۸۰ kPa, the air inlet increases up to ۹۴%, and by increasing ejector outlet pressure, the flow rate ratio reduces such that no suction can be observed at ۱۶۰ kPa. Consequently, in the ۱۵۰ kPa pressure ratio, the flow rate ratio was reduced by almost ۱۰۰%.

Authors

Mohammad Reza Assari

Department of Mechanical Engineering, Jundi-Shapur University of Technology, Dezful, Iran

Hassan Basirat Tabrizi

Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran

Alireza Jafar Gholi Beik

Department of Mechanical Engineering, Jundi-Shapur University of Technology, Dezful, Iran

Kaveh Shamesri

Department of Mechanical Engineering, Jundi-Shapur University of Technology, Dezful, Iran