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A CFD Study on the Hydrodynamics Characteristics of Steam Ejectors
Tony Utomo,MSq,Rahman,Myong Kuk Ji,Hyo Min Jeong,Han Shik Chung 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술
In this research, a study on the hydrodynamics characteristics of ejectors operated in Multi Effect Desalination was conducted by using Computational Fluid Dynamics. The objectives are to compare the performance and to study the flow phenomena inside of these ejectors. The study also focused on the influence of converging duct angle on the performance of constant-pressure mixing ejectors. The converging duct angle was varied at 0.5º, 1º, 2º, 3.5º and 4.5º. The results show the constant-pressure mixing ejector gives higher entrainment ratio than constant-area mixing ejector. The constant-pressure mixing ejector equipped with converging duct angle of 1ºgives the highest entrainment ratio.
A CFD Study on the Hydrodynamics Characteristics of Steam Ejectors
Tony Utomo,MSq Rahman,Myong Kuk Ji,Hyo Min Jeong,Han Shik Chung 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
In this research, a study on the hydrodynamics characteristics of ejectors operated in Multi Effect Desalination was conducted by using Computational Fluid Dynamics. The objectives are to compare the performance and to study the flow phenomena inside of these ejectors. The study also focused on the influence of converging duct angle on the performance of constant-pressure mixing ejectors. The converging duct angle was varied at 0.5°, 1°, 2°, 3.5° and 4.5°. The results show the constant-pressure mixing ejector gives higher entrainment ratio than constant-area mixing ejector. The constant-pressure mixing ejector equipped with converging duct angle of 1° gives the highest entrainment ratio.
Tony Utomo,Zhenhua Jin,MSq Rahman,정효민,정한식 대한기계학회 2008 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.22 No.9
An investigation of the gas-liquid ejector has been carried out to study the influence of operating conditions and ejector geometries on the hydrodynamics and mass transfer characteristics of the ejector by using three-dimensional CFD modeling. The CFD results were validated with experimental data. Flow field analysis and prediction of ejector performance were also conducted. Variations of the operating conditions were made by changing the gas-liquid flow rates ratio in the range of 0.2 to 1.2. The length to diameter ratio of mixing tube (LM/DM) was also varied from 4 to 10. CFD studies show that at LM/DM=5.5, the volumetric mass transfer coefficient increases with respect to gas flow rate. Meanwhile, at LM/DM=4, the plot of volumetric mass transfer coefficient to gas-liquid flow rate ratio reaches the maximum at gas-liquid flow rate ratio of 0.6. This study also shows that volumetric mass transfer coefficient decreases with the increase of mixing tube length.