The Impact of Guide Vane on Nozzle Jet Rigidity

doi:10.11930/j.issn.1004-9649.2017.02.095.06

Abstract

Abstract: The rigidity of nozzle jets has great impacts on the aerodynamic field of the boiler furnace. It can be enhanced by installing collecting guide vanes at the nozzle inlet to make the air more concentrated. In this paper, the impacts of different guide vanes on the jet rigidity are analyzed with Fluent software. By adopting the k-ε model of turbulence, the velocity distributions of the nozzle outlet sections are studied under different operation conditions. Moreover, the effective range S, deflection angle β and velocity component v_z of different nozzles are compared between free jets and disturbed jets. The simulation results show that the collecting guide vanes can increase the jet central velocity, improve the jet anti-jamming capability and reduce the velocity such that the jet rigidity is enhanced. Through comprehensive assessment, it is concluded that the circular arc shaped guide vane has the best performance in rigidity improvement, while in order of performance the other shapes are the parabola curve, the cubic curve and the straight line shaped ones.

Key words: utility boiler, nozzle, jet deviation, collecting guide vane

CLC Number:

TK263

ZHANG Lidong, LI Weiwei, SHAO Tiancheng, YU Tingli, ZHOU Yang. The Impact of Guide Vane on Nozzle Jet Rigidity[J]. Electric Power, 2017, 50(2): 95-100.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2017.02.095.06

https://www.electricpower.com.cn/EN/Y2017/V50/I2/95

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