Numerical Simulation of Direct-contact Condensation from a Supersonic Steam Jet in Subcooled Water

›› 2010, Vol. 18 ›› Issue (4): 577-587.

Numerical Simulation of Direct-contact Condensation from a Supersonic Steam Jet in Subcooled Water

Ajmal Shah¹, Imran Rafiq Chughtai², Mansoor Hameed Inayat²

1. Department of Nuclear Engineering, Pakistan Institute of Engineering and Applied Sciences(PIEAS), Nilore, Islamabad, Pakistan;
2. Department of Chemical and Materials Engineering, Pakistan Institute of Engineering and Applied Sciences(PIEAS), Nilore, Islamabad, Pakistan

收稿日期:2010-01-04 修回日期:2010-05-23 出版日期:2010-08-28 发布日期:2010-08-28
通讯作者: Ajmal Shah1, E-mail:ajmal@pieas.edu.pk;ashahpkl@yahoo.com

Numerical Simulation of Direct-contact Condensation from a Supersonic Steam Jet in Subcooled Water

Ajmal Shah¹, Imran Rafiq Chughtai², Mansoor Hameed²

1. Department of Nuclear Engineering, Pakistan Institute of Engineering and Applied Sciences(PIEAS), Nilore, Islamabad, Pakistan;
2. Department of Chemical and Materials Engineering, Pakistan Institute of Engineering and Applied Sciences(PIEAS), Nilore, Islamabad, Pakistan

Received:2010-01-04 Revised:2010-05-23 Online:2010-08-28 Published:2010-08-28

摘要/Abstract

摘要： The phenomenon of direct-contact condensation,used in steam driven jet injectors,nuclear reactor emergency core cooling systems and direct contact heat exchangers,was investigated computationally by introducing a thermal equilibrium model for direct-contact condensation of steam in subcooled water.The condensation model presented was a two resistance model which takes care of the heat transfer process on both sides of the interface and uses a variable steam bubble diameter.The injection of supersonic steam jet in subcooled water tank was simulated using the Euler-Euler multiphase flow model of Fluent 6.3 code with the condensation model incorporated. The findings of the computational fluid dynamics (CFD) simulations were compared with the published experimental data and fairly good agreement was observed between the two,thus validating the condensation model.The results of CFD simulations for dimensionless penetration length of steam plume varies from 2.73-7.33,while the condensation heat transfer coefficient varies from 0.75-0.917 MW·(m²·K) ^-1 for water temperature in the range of 293-343 K.

关键词: computational fluid dynamics, condensation model, direct-contact condensation, heat transfer coefficient, supersonic steam jet

Abstract: The phenomenon of direct-contact condensation,used in steam driven jet injectors,nuclear reactor emergency core cooling systems and direct contact heat exchangers,was investigated computationally by introducing a thermal equilibrium model for direct-contact condensation of steam in subcooled water.The condensation model presented was a two resistance model which takes care of the heat transfer process on both sides of the interface and uses a variable steam bubble diameter.The injection of supersonic steam jet in subcooled water tank was simulated using the Euler-Euler multiphase flow model of Fluent 6.3 code with the condensation model incorporated. The findings of the computational fluid dynamics (CFD) simulations were compared with the published experimental data and fairly good agreement was observed between the two,thus validating the condensation model.The results of CFD simulations for dimensionless penetration length of steam plume varies from 2.73-7.33,while the condensation heat transfer coefficient varies from 0.75-0.917 MW·(m²·K) ^-1 for water temperature in the range of 293-343 K.

Key words: computational fluid dynamics, condensation model, direct-contact condensation, heat transfer coefficient, supersonic steam jet

Ajmal Shah, Imran Rafiq Chughtai, Mansoor Hameed Inayat. Numerical Simulation of Direct-contact Condensation from a Supersonic Steam Jet in Subcooled Water[J]. , 2010, 18(4): 577-587.

Ajmal Shah, Imran Rafiq Chughtai, Mansoor Hameed. Numerical Simulation of Direct-contact Condensation from a Supersonic Steam Jet in Subcooled Water[J]. , 2010, 18(4): 577-587.

参考文献

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Numerical Simulation of Direct-contact Condensation from a Supersonic Steam Jet in Subcooled Water

Numerical Simulation of Direct-contact Condensation from a Supersonic Steam Jet in Subcooled Water

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