Visualization of heat transfer for impinging swirl flow

Bakırcı, Kadir; Bilen, Kadir

doi:10.1016/j.expthermflusci.2007.03.004

Cited by 44 publications

(42 citation statements)

References 12 publications

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“…And, what is most important from a numerical point of view, their numerical results, obtained with the commercial code Fluent© and the Shear Stress Transport (SST) k − ω turbulence model for values of Reynolds number (Re)r a n g i n gf r o m 10E3 to 30E3, agree very well with previous experimental results obtained by Fenot et al (2005), Lee et al (2002) and Baughn et al (1991). More experimental results are given by O'Donovan & Murray (2007), who studied the impinging of non-swirling jets, and by Bakirci et al (2007), about the impinging of a swirling jet, against a solid wall. The last ones visualize the temperature distribution on the wall and evaluate the heat transfer rate.…”

Section: Introductionsupporting

confidence: 79%

“…The last ones visualize the temperature distribution on the wall and evaluate the heat transfer rate. In Bakirci et al (2007), the swirl is given to the jet by means of a helical solid insert with four narrow slots machined on its surface and located inside a tube. The swirl angle of the slots can be varied in order to have jets with different swirl intensity levels.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Simulation of the Heat Transfer from a Heated Solid Wall to an Impinging Swirling Jet

Ortega-Casanova¹

2011

Two Phase Flow, Phase Change and Numerical Modeling

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Section: Introductionsupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Heat Transfer from a Heated Solid Wall to an Impinging Swirling Jet

Ortega-Casanova¹

2011

Two Phase Flow, Phase Change and Numerical Modeling

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“…Strong generation of turbulence was observed due to vortex breakdown resulting in high values of TKE in the local regions. Bakirci and Bilen [17] experimentally visualized the temperature distribution on the impingement surface maintained at a constant temperature for the multichannel, swirling and conventional jet impingements by means of liquid crystal technique. They used swirl generator insert with the swirl angle fixed at 0 0 , 22.5 0 , 41 0 and 50 0 to alter the direction and strength of the swirl.…”

Section: Experimental Studies On Impinging Flowsmentioning

confidence: 99%

Flow and thermal characteristics of jet impingement: comprehensive review

Shukla¹,

Dewan²

2017

IJHT

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A comprehensive review on jet impingement heat transfer is presented to consider the state-of the art in this field. Among all the single-phase heat transfer arrangements possible, it has the maximum heat transfer rate. A number of arrangements are possible to represent a practical or physical situation, such as, jet impingement on a solid flat surface or surface fitted with different kinds of turbulent promoters, inclined plane surface and cylindrical convex/concave surface, etc. A significant number of papers dealing with experimental and computational studies on different physical and computational aspects of jet impinging flows are reviewed. Several parameters were found to influence the characteristics, such as, flow confinement, nozzle shape, jet to plate spacing and Reynolds number. An extremely small number of studies dealing with application based jet impingement heat transfer configurations (e.g., ribs fitted impingement plate, moving impingement plate, etc) experimentally and numerically have been reported in the literature. Various computational approaches, such as, RANS, LES, DNS and hybrid models, that are used to study the jet impingement heat transfer, with their complexities and boundary conditions, have been reviewed. It was observed that majority of RANS based turbulence models did not predict impinging flows accurately and its complexities except a few. Many authors have reported that LES is capable of predicting the flow field and heat transfer data within the accepted accuracy limits. DNS can be applied to simple geometry with low Reynolds number. Recently some authors have employed hybrid models, such as, PANS, DES, etc., and concluded that these models provide reasonably accurate results and were found to be computationally less expensive than LES and DNS.

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“…Their results show that v 2 -f turbulence model both in terms of accuracy and in terms of time spent, is more appropriate. Bakirci and Bilen [11] investigated the temperature distribution and the heat transfer rate of CIJ, SIJ and MCIJ. They used different swirl angles (θ= 0 °, 22.5 °, 41 °, and 50 ° ).…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the simultaneous influence of swirling flow and obstacles on plate in impinging jet

Zeiny¹,

Farhadi²,

Sedighi³

2017

IJHT

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Swirling effect of impinging jet on turbulent convective heat transfer over the hot plate containing obstacles was studied numerically. To create the swirling flow, input the twisted tape in the nozzle. The twisted number changes are 0 (straight tape), 5, 8, 10 and 12. Three arrangements of obstacles were used. Reynolds number equals to 20,000 and the distance ratios of impinging jet to the impingement plate (b/D) are 2 and 4. The results show that in without obstacle mode in b/D=2, the highest heat-transfer rate happens to use the twisted tape with 12 twists. At b/D=4, by increasing the twist number, the heat transfer decreases. By 12 twists for the impingement plate with one obstacle in b/D=2 the average Nusselt number increases 29 percent higher than the conventional impinging jet (CIJ) and in b/D=4, the heat transfer with swirling flow would be more than CIJ. For impingement plate with three and four obstacles, the swirling flow does not have sensible effect on the heat transfer.

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Visualization of heat transfer for impinging swirl flow

Cited by 44 publications

References 12 publications

Numerical Simulation of the Heat Transfer from a Heated Solid Wall to an Impinging Swirling Jet

Numerical Simulation of the Heat Transfer from a Heated Solid Wall to an Impinging Swirling Jet

Flow and thermal characteristics of jet impingement: comprehensive review

Numerical investigation of the simultaneous influence of swirling flow and obstacles on plate in impinging jet

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