Soot control of laminar jet-diffusion lifted flame excited by high-frequency acoustic oscillation

Journal of Thermal Science and Technology

卷:12

Yuji NAKAMURA¹  Tsutomu SAITO²  Mitsutomo HIROTA² 

[1] Department of Mechanical Engineering, Toyohashi University of Technology;

[2] Department of Mechanical, Aerospace and Materials Engineering, Muroran Institute of Technology;

关键词: premixed combustion;    lifted flame;    combustion products;    ultrasonic wave;    sound and acoustics;   

DOI  :  10.1299/jtst.2017jtst0024

来源: DOAJ

【 摘 要 】

A novel technology to reduce soot is developed utilizing a high-frequency standing wave of 20 kHz applied to a methane-air lifted jet flame base. The amount of soot was measured using the transmitted light attenuation method. A mixing profile of the fuel jet was visualized using acetone planar-laser-induced fluorescence in order to measure the mixing status when the ultrasonic wave was applied. The blow-off and reattached limit were increased by the standing wave. Soot was also clearly decreased under some conditions. This was detected both through a disappearance of the luminous flame and a qualitative measurement using the transmitted light attenuation method. The luminous intensity of the acetone fluorescence at the middle of the fuel jet decreased with height because the fuel jet diffused more efficiently with ultrasonic waves.

【 授权许可】

Unknown