Turbulence measurements in a rectangular mesoscale confined impinging jets reactor

Somashekar, V; Liu, Ying; Fox, Rodney O.; Olsen, Michael G.

doi:10.1007/s00348-012-1388-z

Cited by 6 publications

(3 citation statements)

References 36 publications

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“…The experimental error caused by the particle image processing is ∼1/10 of the seed particle image diameter. , In this study, the particle image diameter is ∼30 μm, and the effective particle diameter is ∼20 μm, as projected back to the flow coordinates. Thus, the experimental error of the particle displacements is within 2.0 μm.…”

Section: Methodsmentioning

confidence: 83%

“…Another reason may be that gear pumps were used to provide the inflows of the CIJRs. Syringe pumps were used recently in the measurements of a rectangular CIJR to avoid flow oscillations and instabilities …”

Section: Resultsmentioning

confidence: 99%

“…Syringe pumps were used recently in the measurements of a rectangular CIJR to avoid flow oscillations and instabilities. 18 The flow fields in our CIJRs were fully turbulent at the Reynolds numbers ranging from Re = 10 620 to Re = 21 210. Centrifugal pumps instead of positive displacement pumps such as gear pumps were used to provide the inflows of our impinging jets.…”

Section: Operating Conditionsmentioning

confidence: 95%

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Particle Image Velocimetry (PIV) Investigation of Flow Characteristics in Confined Impinging Jet Reactors

Gao

Han

et al. 2013

Ind. Eng. Chem. Res.

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The flow characteristics in confined impinging jet reactors (CIJRs) were investigated, using particle image velocimetry. The effects of Reynolds number (Re), jet velocity ratio (u 1/u 2), jet diameter (d), and the factor L (defined as the distance between the axes of two jets and the top wall of the CIJR chamber) on the flow characteristics of CIJRs were discussed. The similarity of the turbulent flow in CIJRs was extended to the operating conditions with high Reynolds numbers, ranging from Re = 10 620 to Re = 21 210. The position of the stagnation point in CIJR is closely related to u 1/u 2, but independent of d. The decrease of the ratio of the factor L to impinging jet diameter (L/d) from 4 to 1.5 can increase the values of turbulent kinetic energy and intensify momentum transfer and mixing in the impinging region of CIJR. The present study shows that CIJRs are ideal reactors for rapid chemical reactions, and optimized parameters are helpful for the design and operation of such reactors.