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Thermodynamic design and structural optimization of a high-temperature high-pressure steam ejector based on mixing entrainment mechanism
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Yumeng GUO1, 2, Suxia MA2, 3, Jingxian ZHANG2, Jiajie ZHANG2, 3
Thermal Power Generation | 2026, 55(3) : 53 - 63
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Thermal Power Generation | 2026, 55(3): 53-63
• Thermal Energy Science Research •
Thermodynamic design and structural optimization of a high-temperature high-pressure steam ejector based on mixing entrainment mechanism
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Yumeng GUO1, 2, Suxia MA2, 3, Jingxian ZHANG2, Jiajie ZHANG2, 3
Affiliations
  • 1.Department of Architecture and Environmental Engineering, Taiyuan University, Taiyuan 030032, China
  • 2.College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • 3.Shanxi Research Institute of Huairou Laboratory, Taiyuan 030024, China
Published: 2026-03-25 doi: 10.19666/j.rlfd.202507134
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Steam ejector technology integrated into combined heat and power systems enables effective thermal-electric decoupling and deep load following, with ejector performance directly influencing overall efficiency and operational stability. A one-dimensional thermodynamic design model for high-temperature and high-pressure steam ejectors is developed by incorporating the development characteristics of the compressible mixing layer. The concept of compressible mixing layer thickness is introduced based on the entrainment mechanism to determine the radial dimensions of the ejector. Numerical simulations are performed to evaluate ejector performance and flow field characteristics, which guide the optimization of axial dimensions. The optimal structural parameters are identified as a nozzle-to-mixing chamber distance of 6 mm, a mixing chamber length of 42 mm, and a diffuser angle of 4.4°. An experimental system is constructed to validate the proposed design method, and the results show an average relative error of 6.6% between the predicted and measured entrainment ratios, demonstrating the model’s accuracy. The results provide a theoretical foundation for the structural design of high-temperature and high-pressure steam ejectors and hold significant potential for practical engineering applications.

thermal-electric decoupling  /  ejector  /  high-temperature and high-pressure  /  mixing entrainment  /  thermodynamic model
Yumeng GUO, Suxia MA, Jingxian ZHANG, Jiajie ZHANG. Thermodynamic design and structural optimization of a high-temperature high-pressure steam ejector based on mixing entrainment mechanism[J]. Thermal Power Generation, 2026 , 55 (3) : 53 -63 . DOI: 10.19666/j.rlfd.202507134
Funding
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  • National Key Research and Development Program(2020YFB0606302)
  • Fundamental Research Program of Shanxi Province(202403021222365)
  • Youth Research Project of Taiyuan University(24TYQN22)
Appendix
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Year 2026 volume 55 Issue 3
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228
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Article Info
doi: 10.19666/j.rlfd.202507134
  • Receive Date：2025-07-25
  • Online Date：2026-08-14
  • Published：2026-03-25
Article Data
Affiliations
History
  • Received：2025-07-25
  • Revised：2025-09-01
  • Accepted：2025-09-05
Funding
National Key Research and Development Program(2020YFB0606302)
Fundamental Research Program of Shanxi Province(202403021222365)
Youth Research Project of Taiyuan University(24TYQN22)
Affiliations
    1.Department of Architecture and Environmental Engineering, Taiyuan University, Taiyuan 030032, China
    2.College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China
    3.Shanxi Research Institute of Huairou Laboratory, Taiyuan 030024, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202507134
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
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Number of
species		 占总种数比例
Percentage of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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