Heat transfer augmentation between impinging circular air jet and flat plate using finned surfaces and vortex generators

Nakod, Pravin; Prabhu, S.V.; Vedula, Rajendra P.

doi:10.1016/j.expthermflusci.2008.01.009

Cited by 41 publications

(10 citation statements)

References 20 publications

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“…Joardar and Jacobi [18,19] experimentally evaluated effectiveness of delta-wing type vortex generators using a full scale wind tunnel. Surface with vortex generators in the form of equilateral triangles of side 4 mm gives increase in the heat transfer coefficient as high as 110% compared to smooth surface [20]. There are two types of vortices, or vortex generators: transverse and longitudinal.…”

Section: Introductionmentioning

confidence: 98%

Flow past confined delta-wing type vortex generators

Akcayoglu

2011

Experimental Thermal and Fluid Science

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Section: Introductionmentioning

confidence: 98%

Flow past confined delta-wing type vortex generators

Akcayoglu

2011

Experimental Thermal and Fluid Science

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“…The reported increases may be due to combined effect of two factors, namely: the enhanced turbulence mixing caused by the rib distortion of the flow fields and the extension of the heat transfer surfaces (fin effect) provided by the ribs. In [41], vortex generators in the form of equilateral triangles are analysed and it is observed that the heat transfer coefficient between the impinging jet and the target plate is sensitive to the shape of the fin with an increase of the heat transfer coefficient up to 77%. The augmentation of the heat transfer for the surfaces vortex generators is higher than that of the finned surfaces.…”

Section: Passive and Active Strategies For Heat Transfer Enhancementmentioning

confidence: 99%

Impinging jets – a short review on strategies for heat transfer enhancement

Năstase

Bode

2018

E3S Web Conf.

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In industrial applications, heat and mass transfer can be considerably increased using impinging jets. A large number of flow phenomena will be generated by the impinging flow, such as: large scale structures, large curvature involving strong shear and normal stresses, stagnation in the wall boundary layers, heat transfer with the impinged wall, small scale turbulent mixing. All these phenomena are highly unsteady and even if nowadays a substantial number of studies in the literature are dedicated, the impinging jets are still not fully understood due to the highly unsteady nature and more over due to great difficulty of performing detailed numerical and experimental investigations.

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“…La plupart des travaux effectués sur les jets confinés sont orientés vers les chambres de combustion des moteurs, des réacteurs nucléaires et des brûleurs afin d'obtenir un mélange homogène entre carburant et comburant, mais aussi dans les cas d'études des risques inhérents aux incendies en milieu confiné et le contrôle des mouvements de masses gazeuses (contrôle des écoulements de fumées) dans les incendies en espaces semi-confinés [1,2,3], Le soufflage par des buses, a diffusion tourbillonnaire, est l'un des meilleurs moyens passifs de mise en oeuvre pratique du contrôle de l'écoulement d'air. Ces diffuseurs induisent une amélioration du confort thermique, conduisant ainsi à une économie d'énergie [4].…”

Section: Introductionunclassified