Numerical Simulation on Interfacial Characteristics in Supersonic Steam–water Injector Using Particle Model Method

Xianbing Chen, Maocheng Tian, Guanmin Zhang and Houke Liu
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Xianbing Chen: School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China
Maocheng Tian: School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China
Guanmin Zhang: School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China
Houke Liu: Jinan Drainage Management and Service Center, Jinan 250101, Shandong, China

Energies, 2019, vol. 12, issue 6, 1-20

Abstract: Steam–water injectors have been widely applied in various industrial fields because of their compact and passive features. Despite its straightforward mechanical design, the internal two-phase condensing flow phenomena are extremely complicated. In present study, a numerical model has been developed to simulate steam–water interfacial characteristics in the injectors based on Eulerian–Eulerian multiphase model in ANSYS CFX software. A particle model is available for the interphase transfer between steam and water, in which a thermal phase change model was inserted into the model as a CFX Expression Language (CEL) to calculate interphase heat and mass transfer. The developed model is validated against a test case under a typical operating condition. The numerical results are consistent with experimental data both in terms of axial pressure and temperature profiles, which preliminarily demonstrates the feasibility and accuracy of particle model on simulation of gas–liquid interfacial characteristics in the mixing chamber of injector. Based on the dynamic equilibrium of steam supply and its condensation, interfacial characteristics including the variation of steam plume penetration length and steam–water interface have been discussed under different operating conditions. The numerical results show that steam plume expands with steam inlet mass flow rate and water inlet temperature increasing, while it contracts with the increase of water inlet mass flow rate and backpressure. Besides this, the condensation shock position moves upstream with the backpressure increasing.

Keywords: steam–water injector; numerical simulation; particle model; interfacial characteristics; steam plume (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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