Heat Transfer Characteristics for Jet Array Impingement With Initial Crossflow

Florschuetz, L. W.; Metzger, D. E.; Su, C. C.

doi:10.1115/83-gt-28

Cited by 27 publications

(27 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The studies of Florschuetz et al [2], included the significance of considering initial crossflow for jet impingement array especially in simulating the impingement cooled mid-chord region of a gas turbine airfoil. A similar study of considering initial crossflow effects has been carried out by Chambers et al [3] in which they showed that the initial crossflow strongly influenced the heat transfer distribution by comparing different mass flux ratios between the crossflow and jet. It is not only the flow parameters but also the geometric configuration that influences the heat transfer performance.…”

Section: Introductionmentioning

confidence: 74%

Computational Study of Flow and Heat Transfer With Anti Cross-Flows (ACF) Jet Impingement Cooling for Different Heights of Corrugate

Dhanasegaran

Pugazhendhi

2017

Volume 1: Aerospace Heat Transfer; Computational Heat Transfer; Education; Environmental Heat Transfer; Fire and Combustion Sys

View full text Add to dashboard Cite

In the present study, a flow visualization and heat transfer investigation is carried out computationally on a flat plate with 10×1 array of impinging jets from a corrugated plate. This corrugated structure is an Anti-Cross Flow (ACF) technique which is proved to nullify the negative effects of cross-flow thus enhancing the overall cooling performance. Governing equations are solved using k-ω Shear Stress Transport (SST) turbulence model in commercial code FLUENT. The parameter variation considered for the present study are (i) three different heights of ACF corrugate (C/D = 1, 2 & 3) and (ii) two different jet-to-target plate spacing (H/D = 1 & 2). The dependence of ACF structure performance on the corrugate height (C/D) and the flow structure has been discussed in detail, therefore choosing an optimum corrugate height and visualizing the three-dimensional flow phenomena are the main objectives of the present study. The three-dimensional flow separation and heat transfer characteristics are explained with the help of skin friction lines, upwash fountains, wall eddies, counter-rotating vortex pair (CRVP), and plots of Nusselt number. It is found that the heat transfer performance is high at larger corrugate heights for both the jet-to-plate spacing. Moreover, the deterioration of the skin friction pattern corresponding to the far downstream impingement zones is greatly reduced with ACF structure, retaining more uniform heat transfer pattern even at low H/D values where the crossflow effects are more dominant in case of the conventional cooling structure. In comparison of the overall heat transfer performance the difference between C/D = 3 & C/D = 2 for H/D = 2 is significantly less, thus making the later as the optimal configuration in terms of reduced channel height.

show abstract

Section: Introductionmentioning

confidence: 74%

Computational Study of Flow and Heat Transfer With Anti Cross-Flows (ACF) Jet Impingement Cooling for Different Heights of Corrugate

Dhanasegaran

Pugazhendhi

2017

Volume 1: Aerospace Heat Transfer; Computational Heat Transfer; Education; Environmental Heat Transfer; Fire and Combustion Sys

View full text Add to dashboard Cite

show abstract

“…In an investigation by Florschuetz et al (1984) [9], two dimensional arrays of circular jets impinging on a heat transfer surface parallel to the jet orifice plate were considered. The impinging arrays of jets were forced to leave the test section in a single direction through a channel.…”

Section: Literature Reviewmentioning

confidence: 99%

Invisibly at Risk: Low-Income Students in a Middle- and Upper-Class World

Duffy

2007

About Campus: Enriching the Student Learning Experience

View full text Add to dashboard Cite

show abstract

“…Reasonable diameters of impinging hole will help to improve the effect of heat transfer. In the literature [8][9][10][11][12] which use numerical method to study the Impingement cooling, the results shows that the back jet is destroyed by cross flow and lead to the convective heat transfer is complex. Reducing the impact distance and increasing the Reynolds number can increase the convective heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Impingement Cooling Under Constant Heat Flux

Gao¹,

Lei²,

Jiang³

2017

Proceedings of the 2017 2nd International Conference on Automation, Mechanical Control and Computational Engineering (AMCCE 201

View full text Add to dashboard Cite

Abstract. Take the rotating detonation engine combustion chamber wall which under great heat flux as the research background. The characteristics of impingement cooling under different parameters were studied by numerical simulation, then analyzing and getting a better Impingement cooling structure. It is found that under the same air mass flow rate and constant heat flux,when the diameter of impingement hole is d=4mm, the impingement distance is H=4mm, the hole spacing is Xn=Yn= 35.168mm,the cooling effect is the best. With the cooling structure, the cooling of the heated wall with constant heat flux of 500000 W/m 2 was studied. The results show that when the Reynolds number is Re = 50000, the wall is cooled and the wall temperature is reduced to a reasonable range.

show abstract

Heat Transfer Characteristics for Jet Array Impingement With Initial Crossflow

Cited by 27 publications

References 10 publications

Computational Study of Flow and Heat Transfer With Anti Cross-Flows (ACF) Jet Impingement Cooling for Different Heights of Corrugate

Computational Study of Flow and Heat Transfer With Anti Cross-Flows (ACF) Jet Impingement Cooling for Different Heights of Corrugate

Invisibly at Risk: Low-Income Students in a Middle- and Upper-Class World

Numerical Study of Impingement Cooling Under Constant Heat Flux

Contact Info

Product

Resources

About