热力发电2026，Vol.55Issue(3)：53-63,11.DOI:10.19666/j.rlfd.202507134
基于混合卷吸机理的高温高压蒸汽引射器热力学设计与结构优化
Thermodynamic design and structural optimization of a high-temperature high-pressure steam ejector based on mixing entrainment mechanism
摘要
Abstract
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.关键词
热电解耦/引射器/高温高压/混合卷吸/热力学模型Key words
thermal-electric decoupling/ejector/high-temperature and high-pressure/mixing entrainment/thermodynamic model引用本文复制引用
郭宇朦,马素霞,张敬贤,张嘉杰..基于混合卷吸机理的高温高压蒸汽引射器热力学设计与结构优化[J].热力发电,2026,55(3):53-63,11.基金项目
国家重点研发计划项目(2020YFB0606302) （2020YFB0606302）
山西省基础研究计划项目(202403021222365) （202403021222365）
太原学院青年项目(24TYQN22) National Key Research and Development Program(2020YFB0606302) （24TYQN22）
Fundamental Research Program of Shanxi Province(202403021222365) （202403021222365）
Youth Research Project of Taiyuan University(24TYQN22) （24TYQN22）
