Investigation on the Mechanism of Energy Saving and Efficiency Enhancement for Fluid Ejector

Abstract:

Experiments were implemented on a prototype commercial liquid ejector to measure its hydraulic efficiency and the change of which along with a certain range of water flow rate variation was also recorded. Based on theoretical analysis and numerical simulation methods, we improved the ejector’s structure by modifying the suction part of it. Four ameliorated ejector structures, with increased pumping power and reduced flow resistance compared to the prototype, are proposed. Under the same working flow rate condition, flow field computations were conducted on the prototype and the four improved structures. The computational results show that the pumping power increases by 75.97%, the drag coefficient reduces 0.0908, the maximum turbulent energy dissipation rate decreases by 38.88% and the absolute value of the efficiency increases by 13.66%. The work validates the correctness of the theoretical analysis about the mechanism of energy-saving and efficiency enhancement for fluid ejector, and provides a more effective method to improve the performance of liquid ejector.

• Periodical: Applied Mechanics and Materials (Volumes 121-126)
• Pages: 2804-2808
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.121-126.2804
• Online since: October 2011
• Authors: Gui Ju Xing, Zi Huan Li, Hong Liang Zheng, Jian Wang, Fu Sheng Jiang
• Keywords: Draft, Drag Coefficient, Efficiency, Turbulent Energy Dissipation Rate

References

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[4] Zi-xiong ZHANG, Zeng-nan DONG: Mechanics of viscous fluids (Tsinghua University Press, Beijing 1998). Fig. 8 Distribution of static pressure (suction power) and velocity in suction and mixing part of the five ejector structures.