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ORIGINAL RESEARCH article
Front. Energy Res.
Sec. Energy Efficiency
Volume 12 - 2024 |
doi: 10.3389/fenrg.2024.1413488
Research on the Internal Flow Mechanism and Pressure Fluctuation Characteristics of Energy Recovery Turbine under Multiple Conditions
Provisionally accepted- 1 Lanzhou University of Technology, Lanzhou, China
- 2 Other, Chongqing, China
Energy recovery turbine (ERT) plays an important role in reducing the energy consumption of reverse osmosis seawater desalination systems. Internal flow loss mechanism and hydraulic vibration characteristics of a centrifugal ERT are studied under multiple conditions. The results show that the highefficiency range of the ERT tends to high flow conditions. The energy loss is mainly concentrated at the tongue in the volute, which is due to the generation of flow separation vortexes. There is flow separation phenomenon on the suction surface side of the blade trailing under 0.8Qd condition. The energy loss of the ERT is the lowest under 1.0Qd condition, because the interaction between the fluid and the blades is the weakest. There are vortices formed by flow impact on the blade pressure surface under 1.2Qd condition. There are vortexes on the blade suction face, which generated by fluid separation. The closer the relative liquid flow angle is to the blade settle angle, the smaller the energy loss in the impeller.Therefore, the ERT should first reduce rated flow appropriately before hydraulic design, which is beneficial for efficient operation under multiple conditions.
Keywords: Energy recovery turbine, performance, Internal flow loss, vortex, pressure fluctuation
Received: 07 Apr 2024; Accepted: 22 May 2024.
Copyright: © 2024 Yuan, Ma, Li, Wei and Qi. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Bing Qi, Lanzhou University of Technology, Lanzhou, China
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