Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (11): 1573-1577.DOI: 10.12068/j.issn.1005-3026.2016.11.012

• Materials & Metallurgy • Previous Articles     Next Articles

Water-Water Ejecting Behavior in a Natural Circulation Evaporation Cooling System

FENG Ming-jie, WANG En-gang, FENG Hui-cong   

  1. Key Laboratory of National Education Ministry for Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China.
  • Received:2015-04-29 Revised:2015-04-29 Online:2016-11-15 Published:2016-11-18
  • Contact: FENG Ming-jie
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Abstract: The ejecting behavior of a new ejecting technique, named water-water ejecting technique, which is used to start up the natural circulation evaporation cooling system for a reheating furnace is numerically simulated with Fluent 6.3 software.The influences of ejecting tube diameter, diameter ratio of outlet to inlet and ejecting flowrate on circulating velocity and local resistance loss coefficient of the evaporation cooling circuit nearby ejecting tube are studied. The results indicated that the flow characteristics of water in the cooling circuit follows the general law of confined isothermal jet ejecting. The circulating velocity increases with the increasing of ejecting flowrate, but it decreases with the increasing of diameter ratio of outlet to inlet when the ejecting tube diameter is constant. At the same time, the circulating velocity decreases with the increasing of ejecting tube diameter when the ejecting flowrate and diameter ratio of outlet to inlet are both constant. The performance of necking-type ejecting tube is better than that of flared-type considering the ejecting performance and resistance loss.

Key words: evaporated cooling, natural circulation, water-water-ejecting, circulating velocity, resistance loss coefficient

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