Temperature profile of thermal impinging flow induced by horizontally oriented rectangular jet flame upon an opposite plate

[+] Author and Article Information
Bingyan Dong

Hebei University of Technology Tianjin, China 300401 China dongbingyan870323@163.com

Youbo Huang

Beijing University of Technology Beijing, 100124 China huangyoubo6@163.com

Jinxiang Wu

Hebei University of Technology Tianjin, 300401 China wujnxd@163.com

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the Journal of Thermal Science and Engineering Applications. Manuscript received January 11, 2019; final manuscript received April 4, 2019; published online xx xx, xxxx. Assoc. Editor: Matthew Oehlschlaeger.

ASME doi:10.1115/1.4043469 History: Received January 11, 2019; Accepted April 05, 2019


The horizontally oriented jet flame induced by rectangular source impinging upon opposite wall is actually common in chemical industry, but the related studies are limited. In this paper, the computational fluid dynamics codes are carried out to investigate the temperature profile in thermal impinging flow of horizontally oriented methane jet flame with rectangular source, which the rectangular orifice is 400mm2 with three different aspect ratios (L/W=1, 2, 4), besides, the jet velocities vary from 27.5m/s to 125m/s. As the horizontally oriented methane jet flame impinges on the vertical plate in front of the fuel orifice directly, the vertical temperature along opposite plate is focused on. Results show that the temperature near the impingement point is same for different jet velocities, but the temperature along vertical direction is larger with fuel jet velocity increasing. Moreover, the orifice aspect ratio has a significant effect on temperature, which the temperature increases with aspect ratio at a given position for momentum-controlled flame. The effective heat release rate on the basis of unburned fuel and ellipse flame shape hypothesis is put forward to correlate the temperature profile. Finally, a new correlation to illustrate the vertical temperature rising along opposite plate is proposed in light of orifice aspect ratio and fuel jet velocity, and the predictions obtained by proposed model agree well with numerical results, which is applicable for horizontally oriented flame with rectangular source impinging upon the opposite wall.

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