主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (1): 29-32.

• • 上一篇    下一篇

火旋风燃烧过程中负压场的探究

何海，武保林，江平   

  1. 沈阳航空航天大学安全工程学院，辽宁沈阳110136
  • 出版日期:2021-01-15 发布日期:2021-01-15
  • 作者简介:何海（1994-），男，安徽安庆人，沈阳航空航天大学安全工程学院硕士研究生，主要从事火旋风研究，辽宁省沈阳市沈北新区道义南大街37 号，110136。

Study on negative pressure field in the process of fire whirl combustion

HE Hai, WU Bao-lin, JIANG Ping   

  1. School of Safety Engineering, Shenyang Aerospace University, Liaoning Shenyang 110136, China
  • Online:2021-01-15 Published:2021-01-15

摘要：

为了探究自然驱动的四面夹缝火旋风装置中，火旋风燃烧过程中油层表面形成的负压场，在一定简化的假设条件下，建立了火旋风燃烧过程中产生的负压场模型，对火旋风的涡核半径、涡核强度进行了计算。实验室形成的小型火旋风涡核半径与油盘尺寸成正相关。涡核强度与涡核半径的关系则可用指数函数表示；气动力机制是决定火旋风质量燃烧速率的主导机制。

关键词: 火旋风, 负压场, 涡核半径, 涡核强度, 负压抽吸

Abstract: In order to study the negative pressure field formed on the surface of the oil desk during the combustion of the fire whirl in the naturally driven four-sided slit fire whirl device, under the condition of simplified hypothesis, the negative pressure field model produced in the combustion process of fire cyclone was established. The radius and strength of vortex core of fire whirlwind were calculated. The radius of the small-scale vortex core formed in the laboratory is positively correlated with the size of the oil pan. The relationship between vortex core strength and vortex core radius can be expressed by exponential function, and aerodynamic mechanism is the dominant mechanism to determine the mass combustion rate of fire cyclone.

Key words:  fire cyclone, negative pressure field, vortex core radius, vortex core strength, negative pressure suction