Experimental investigation of flame length of buoyancy-controlled jet flames from inclined rectangular nozzles

ABSTRACT

In this paper, the buoyancy-controlled jet flames from the inclined rectangular nozzles with different aspect ratios have been investigated. The length-to-width aspect ratios of nozzles are 1, 2.25, 4, 9, and 16 with the same cross-sectional area. The inclined angles of the nozzle to the horizontal direction are 0°, 30°, 60°, and 90°. The value of flame length changes at the same inclined angle for different aspect ratios. A correlation has been developed to calculate the flame length of jet flame for different inclined nozzle and aspect ratios with an arbitrary angle.

KEYWORDS:

• Flame length
• inclined angle
• rectangular nozzles
• jet flames

Additional information

Funding

This work was supported by the National Natural Science Foundation of China: [Grant Numbers 51408181, 51576185, 51606092]; the Fundamental Research Funds for the Central Universities: [Grant Number JZ2017HGTB0208]; the Opening Foundation of State Key Laboratory of Fire Science, University of Science and Technology of China: [Grant Number HZ2017-KF01].