Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (6): 856-860.DOI: 10.12068/j.issn.1005-3026.2016.06.020

• Mechanical Engineering • Previous Articles     Next Articles

Characteristic Research on Steam Flowing Across Tubes Under the Interaction of Liquid Film and Liquid Droplet

LIU Hua1,2, GONG Lu-yuan1, SHEN Sheng-qiang1, CHEN Xue1   

  1. 1. Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, China; 2. College of Vehicles and Energy, Yanshan University, Qinhuangdao 066004, China.
  • Received:2014-11-20 Revised:2014-11-20 Online:2016-06-15 Published:2016-06-08
  • Contact: SHEN Sheng-qiang
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Abstract: To investigate the two-phase flow characteristics under the interaction of liquid and gas over horizontal tubes, the rotated-square arranged tube bank was chosen and the VOF method was employed to propose an intertube droplet model. The thickness of liquid film and the droplet diameter was initialized according to the void fraction. The steam flowing process under the interaction of liquid film and droplet was simulated. The analyses of velocity field and pressure field were also illustrated. The results indicate that the calculated value of pressure drop coincides well with the experimental data at the small spray density. In the computational zone, the pressure in the bottom area is higher than that in upper area, and the minimum pressure distribution is in the lower right side near the droplet. The deformation of the liquid droplet in falling process is caused by the uneven distribution of pressure.

Key words: VOF model, flow characteristic, void fraction, liquid film, liquid droplet

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