Flow characteristics in free impinging jet reactor by particle image velocimetry (PIV) investigation

Jun Zhang; Youzhi Liu; Guisheng Qi; Weizhou Jiao; Zhiguo Yuan

doi:10.1088/0169-5983/48/4/045505

Flow characteristics in free impinging jet reactor by particle image velocimetry (PIV) investigation

Jun Zhang
, Youzhi Liu
, Guisheng Qi
, Weizhou Jiao
, Zhiguo Yuan

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

12 Citations (Scopus)

Abstract

The flow characteristics in free impinging jet reactors (FIJRs) were investigated using particle image velocimetry (PIV). The effects of the Reynolds number (Re) and the ratio of jet distance to jet diameter (w/d) on flow behavior were discussed for equal volumetric flow rates of the two jets. The impingement plane, instantaneous velocity, mean velocity, and turbulent kinetic energy (TKE) distribution of FIJRs are measured from captured images using the PIV technique. As Re increases, the average diameter of the impingement plane linearly increases. The instability of the liquid is closely related to the jet velocity or the Re. However, the stagnation point is insensitive to the variation of the Re. The droplets break up from the turbulent liquid in the 'wall-free' environment of FIJRs, so that the liquid back-flow found in confined impinging jet reactors (CIJRs) is not observed. Increasing the Re from 1800-4100 or decreasing the w/d from 20-6 plays a similar role in increasing the TKE values and intensifying turbulence, which promotes the momentum transfer and mixing efficiency in FIJRs. © 2016 The Japan Society of Fluid Mechanics and IOP Publishing Ltd.

Original language	English
Article number	045505
Journal	Fluid Dynamics Research
Volume	48
Issue number	4
DOIs	https://doi.org/10.1088/0169-5983/48/4/045505
Publication status	Published - 13 Jul 2016
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

droplets
flow characteristics
free impinging jet reactors
mixing
PIV
turbulent kinetic energy

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@article{c8c5ebf0ec914aed9a2d5478505c770d,

title = "Flow characteristics in free impinging jet reactor by particle image velocimetry (PIV) investigation",

abstract = "The flow characteristics in free impinging jet reactors (FIJRs) were investigated using particle image velocimetry (PIV). The effects of the Reynolds number (Re) and the ratio of jet distance to jet diameter (w/d) on flow behavior were discussed for equal volumetric flow rates of the two jets. The impingement plane, instantaneous velocity, mean velocity, and turbulent kinetic energy (TKE) distribution of FIJRs are measured from captured images using the PIV technique. As Re increases, the average diameter of the impingement plane linearly increases. The instability of the liquid is closely related to the jet velocity or the Re. However, the stagnation point is insensitive to the variation of the Re. The droplets break up from the turbulent liquid in the 'wall-free' environment of FIJRs, so that the liquid back-flow found in confined impinging jet reactors (CIJRs) is not observed. Increasing the Re from 1800-4100 or decreasing the w/d from 20-6 plays a similar role in increasing the TKE values and intensifying turbulence, which promotes the momentum transfer and mixing efficiency in FIJRs. {\textcopyright} 2016 The Japan Society of Fluid Mechanics and IOP Publishing Ltd.",

keywords = "droplets, flow characteristics, free impinging jet reactors, mixing, PIV, turbulent kinetic energy",

author = "Jun Zhang and Youzhi Liu and Guisheng Qi and Weizhou Jiao and Zhiguo Yuan",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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volume = "48",

journal = "Fluid Dynamics Research",

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TY - JOUR

T1 - Flow characteristics in free impinging jet reactor by particle image velocimetry (PIV) investigation

AU - Zhang, Jun

AU - Liu, Youzhi

AU - Qi, Guisheng

AU - Jiao, Weizhou

AU - Yuan, Zhiguo

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2016/7/13

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N2 - The flow characteristics in free impinging jet reactors (FIJRs) were investigated using particle image velocimetry (PIV). The effects of the Reynolds number (Re) and the ratio of jet distance to jet diameter (w/d) on flow behavior were discussed for equal volumetric flow rates of the two jets. The impingement plane, instantaneous velocity, mean velocity, and turbulent kinetic energy (TKE) distribution of FIJRs are measured from captured images using the PIV technique. As Re increases, the average diameter of the impingement plane linearly increases. The instability of the liquid is closely related to the jet velocity or the Re. However, the stagnation point is insensitive to the variation of the Re. The droplets break up from the turbulent liquid in the 'wall-free' environment of FIJRs, so that the liquid back-flow found in confined impinging jet reactors (CIJRs) is not observed. Increasing the Re from 1800-4100 or decreasing the w/d from 20-6 plays a similar role in increasing the TKE values and intensifying turbulence, which promotes the momentum transfer and mixing efficiency in FIJRs. © 2016 The Japan Society of Fluid Mechanics and IOP Publishing Ltd.

AB - The flow characteristics in free impinging jet reactors (FIJRs) were investigated using particle image velocimetry (PIV). The effects of the Reynolds number (Re) and the ratio of jet distance to jet diameter (w/d) on flow behavior were discussed for equal volumetric flow rates of the two jets. The impingement plane, instantaneous velocity, mean velocity, and turbulent kinetic energy (TKE) distribution of FIJRs are measured from captured images using the PIV technique. As Re increases, the average diameter of the impingement plane linearly increases. The instability of the liquid is closely related to the jet velocity or the Re. However, the stagnation point is insensitive to the variation of the Re. The droplets break up from the turbulent liquid in the 'wall-free' environment of FIJRs, so that the liquid back-flow found in confined impinging jet reactors (CIJRs) is not observed. Increasing the Re from 1800-4100 or decreasing the w/d from 20-6 plays a similar role in increasing the TKE values and intensifying turbulence, which promotes the momentum transfer and mixing efficiency in FIJRs. © 2016 The Japan Society of Fluid Mechanics and IOP Publishing Ltd.

KW - droplets

KW - flow characteristics

KW - free impinging jet reactors

KW - mixing

KW - PIV

KW - turbulent kinetic energy

UR - https://www.scopus.com/pages/publications/84984697907

UR - https://www.scopus.com/pages/publications/84984697907#tab=impact

U2 - 10.1088/0169-5983/48/4/045505

DO - 10.1088/0169-5983/48/4/045505

M3 - RGC 21 - Publication in refereed journal

SN - 0169-5983

VL - 48

JO - Fluid Dynamics Research

JF - Fluid Dynamics Research

IS - 4

M1 - 045505

ER -

Flow characteristics in free impinging jet reactor by particle image velocimetry (PIV) investigation

Abstract

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