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JOURNAL OF MECHANICAL ENGINEERING  > 2017  >  43(1): 113-117.
LI Junmei, ZHANG Ren, LI Yanfeng, ZHAO Yuhang, TIAN Yang. Oretical Analysis on the Dynamics of Line Plume in Thermal-stratified Environment[J]. JOURNAL OF MECHANICAL ENGINEERING, 2017, 43(1): 113-117. doi: 10.11936/bjutxb2016050010
Citation: LI Junmei, ZHANG Ren, LI Yanfeng, ZHAO Yuhang, TIAN Yang. Oretical Analysis on the Dynamics of Line Plume in Thermal-stratified Environment[J]. JOURNAL OF MECHANICAL ENGINEERING, 2017, 43(1): 113-117. doi: 10.11936/bjutxb2016050010
shu

Oretical Analysis on the Dynamics of Line Plume in Thermal-stratified Environment

doi: 10.11936/bjutxb2016050010
  • 1.

    Beijing Collaborative Innovation Center for Metropolitan Transportation, Beijing University of Technology, Beijing 100124, China

  • 2.

    College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China

  • Received Date: 06 May 2016
    Available Online: 09 Sep 2022
  • Issue Publish Date: 01 Jan 2017
    Abstract
  • Thermal-stratified environment is often seen in atria or other large space buildings with glass roofs due to the solar radiation. In order to study the effect of the thermal-stratified environment on the smoke spread in fire cases, theoretical analysis of the thermal dynamics of the line plume in the environment with constant vertical temperature gradient was carried out based on the former research in this paper. Variations of the radius, central velocity, density difference of the line plume with height were derived, and the maximum height of the plume was obtained. The upward buoyancy due to the line source changed its direction at the height of 76% of the maximum height which the plume could rise.

     

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