A Numerical Investigation of Effects of Different Nozzle Spacing on Turbulent Flow in a Novel Circular Jet Mixer

Author

Yu Yan-fang ; Liu Xiao-Ren ; Meng Hui-bo ; Wu Jian-hua

Author_Institution

Coll. of Mech. Eng., Shenyang Univ. of Chem. Technol., Shenyang, China

fYear

2011

fDate

25-27 April 2011

Firstpage

318

Lastpage

321

Abstract

In order to investigate the flow characteristic in a novel circular jet mixer (CJM), the three-dimensional flow field of CJM with different nozzles spacing are investigated using CFD. The effects of different distances of nozzles are evaluated by the turbulent flow index, such as velocity and the self-similarity of the axial velocity, through the jet plane. Results show that larger nozzle spacing needs a longer jet length to complete the combination of the three jet flow, compared to the lower distance of nozzles. A linear equation is obtained to describe the attenuation of the axial velocity on different nozzles spacing. The self-similarity of the velocity at nozzles spacing is H₀/D_j=5 present a similarity to the free turbulent jet. The conditions of multi-nozzle turbulent flow also give help to investigate the mixing effects in the CJM.

Keywords

computational fluid dynamics; confined flow; fractals; jets; mixing; mixtures; nozzles; numerical analysis; turbulence; CFD; axial velocity; axial velocity attenuation; flow characteristics; free turbulent jet; linear equation; mixing effect; multinozzle turbulent flow; novel circular jet mixer; nozzle effect; numerical method; self-similarity; three-dimensional flow field; turbulent flow index; Attenuation; Computational fluid dynamics; Computational modeling; Equations; Mathematical model; Mixers; Numerical models; axial velocity; nozzles spacing; numerical investigation; self-similariy;

fLanguage

English

Publisher

ieee

Conference_Titel

Information and Computing (ICIC), 2011 Fourth International Conference on

Conference_Location

Phuket Island

Print_ISBN

978-1-61284-688-0

Type

conf

DOI

10.1109/ICIC.2011.27

Filename

5954569