自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(英文版)

Journal of Central South University

Vol. 26    No. 11    November 2019

[PDF Download]    [Flash Online]

    

Simulation on flow, heat transfer and stress characteristics of large-diameter thick-walled gas cylinders in quenching process under different water spray volumes
GAO Jing-na(高静娜)1, 2, GAO Ying(高颖)2, XU Qin-ran(徐钦冉)1, WANG Ge(王葛)1, LI Qiang(李强)1, 3

1. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling,Yanshan University, Qinhuangdao 066004, China;
2. School of Materials Science and Engineering, Hebei University of Science and Technology,
Shijiazhuang 050018, China;
3. School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China

Abstract:Cooling strength is one of the important factors affecting microstructure and properties of gas cylinders during quenching process,and reasonable water spray volume can effectively improve the quality of gas cylinders and reduce production costs. To find the optimal water spray parameters, a fluid-solid coupling model with three-phase flow was established in consideration of water-vapor conversion. The inner and outer walls of gas cylinder with the dimensions of d914 mm×38 mm×12000 mm were quenched using multi-nozzle water spray system. The internal pressure, average heat transfer coefficient (have) and stress of the gas cylinder under different water spray volumes during quenching process were studied. Finally, the mathematical model was experimentally verified. The results show that both the internal pressure and have increase along with the increase of spray volume. The internal pressure increases slowly first and then rapidly, but have increases rapidly first and then slowly. To satisfy hardenability of gas cylinders, the minimum spray volume should not be less than 40 m3/(h·m). The results of stress indicate that water spray quenching will not cause deformation of bottle body in the range of water volume from 40 to 290 m3/(h·m).

 

Key words: large-diameter thick-walled gas cylinders; quenching; water spray volume; heat transfer; stress; numerical simulation

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号