Numerical analysis of flow characteristics of a swirl-stabilized premixed burner with different swirl vane configurations

This study numerically investigates the flow and combustion characteristics of a swirl-premixed burner with a curved vane swirler (i.e., curved type) to reduce the pressure loss of the burner nozzle with a conventional vane swirler (i.e., flat type). For the curved type swirler, the pressure loss is...

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Bibliographic Details
Published in:Journal of mechanical science and technology 2022-11, Vol.36 (11), p.5793-5800
Main Authors: Ju, Hae-ji, Cho, Ju Hyeong, Hwang, Jeongjae
Format: Article
Language:English
Subjects:
Control
Dynamical Systems
Emissions
Emissions control
Engineering
Flame propagation
Flow characteristics
Flow separation
Fuel-air mixing
Fuels
Industrial and Production Engineering
Mechanical Engineering
Numerical analysis
Original Article
Pressure effects
Pressure loss
Swirling
Vibration
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Summary:This study numerically investigates the flow and combustion characteristics of a swirl-premixed burner with a curved vane swirler (i.e., curved type) to reduce the pressure loss of the burner nozzle with a conventional vane swirler (i.e., flat type). For the curved type swirler, the pressure loss is decreased by 35 % due to the inhibition of flow separation at the vane, and NO X emission is reduced by 69 % because fuel-air mixing is enhanced at the flame front, leading to more uniform fuel distribution toward downstream. In addition, the characteristics of the jet penetration are analyzed because the jet behavior is crucial to fuel-air mixing. The jet trajectory in non-swirling flow can be reasonably predicted by a conventional formula, but it is difficult to predict the jet trajectory in swirling flow by this formula because of the effect of a radial pressure gradient formed by the swirling flow.
ISSN:1738-494X
1976-3824
DOI:10.1007/s12206-022-1040-7