Effect of Nozzle Contraction Angle on Air Entrainment Rate of a Vertical Plunging Liquid Jet

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Akira Ohkawa¹  Kei Tajima¹  Akira Ito¹  Kazuaki Yamagiwa¹  Masanori Yoshida¹ 

[1] Department of Chemistry and Chemical Engineering, Niigata University

关键词: Air Entrainment;    Nozzle Geometry;    Power Efficiency;    Vertical Liquid Jet;    Water Jet Aeration;   

DOI  :  10.1252/jcej.33.805

来源: Maruzen Company Ltd

【 摘 要 】

References(7)Cited-By(8)The effect of nozzle contraction angle on air entrainment rate by a vertical plunging liquid jet was investigated. The surface roughness of the jet increases with increasing nozzle contraction angle up to about 40°, and then levels off. The volumetric air entrainment rate increases in proportion to (sinθ)0.21, corresponding to the increased surface roughness of the jet. The air entrainment rate is correlated with empirical equations, which cover a wider range of the nozzle geometries and operational conditions. The relationship between the air entrainment rate per power consumption and nozzle contraction angle was also investigated. The power efficiency for air entrainment is found to be almost independent of the nozzle contraction angle.

【 授权许可】

Unknown