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| Experimental Investigation on Humid Air Diffustion Combustion in
a Multihole Nozzle Swirl Burner |
| GE Bing, ZANG Shu-Sheng, GUO Pei-Qing |
| (Turbo Machinery Institute, School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract Experiments were performed to investigate the flow structures of humid air combustion flame in a multihole nozzle swirl burner. The experiments show that with steam addition, the flame becomes dark, and the flame dimensions grow; the distances between vortexes of recirculation zone and nozzle reduce; the peaks of radial mean velocity, radial rms velocity and Reynolds shear stress decrease; the maximum mean turbulent kinetic energy decreases, and the biggest reversing velocity on nozzle centerline reduces; the width of recirculation zone and the distance between centerline biggest reversing velocity and nozzle is lower; the expansion angle of swirling jet reduces；the axial nonuniform coefficient of outlet increases.
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Received: 30 June 2011
Published: 28 May 2012
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