Heat transfer from impinging gas jets on an enclosed concave surface

Jusionis, Vytautas J.

doi:10.2514/3.44127

Cited by 21 publications

(9 citation statements)

References 2 publications

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“…Fig.1 shows the schematic of a typical wing hot-air anti-icing system [20]. When the aircraft is flying under the icing conditions, high temperature and high pressure air from the engine compressor is introduced into the wing anti-icing cavity through the holes on the piccolo tube.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of jet impingement heat transfer on a variable-curvature concave surface in a wing leading edge

Peng

Lin

et al. 2015

International Journal of Heat and Mass Transfer

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Abstract:In this paper, extensive experimental investigation of the heat transfer characteristics of jet impingement on a variable-curvature concave surface in a wing leading edge was conducted for aircraft anti-icing applications. The experiments were carried out over a wide range of parameters: the jet Reynolds number, Rej, from 51021 to 85340, the relative tube-to-surface distance, H/d, from 1.736 to 19.76, and the circumferential angle of jet holes on the piccolo tube, , from -60° to 60°. In addition, jet impingements with single one, two and three rows of aligned jet holes were all investigated. Experimental results revealed the effects of various parameters on the performance and characteristics of jet impingement heat transfer in the specific structure adopted here, and our insufficient understanding on the corresponding physical mechanism was presented. It was found that the jet impingement heat transfer performance was enhanced with the increase of jet Reynolds number.For single one row of jet holes, an optimal H/d of 4.5 was determined under Rej = 51021 and d = 2mm, for which the jet impingement achieved the best heat transfer performance. For two and three rows of aligned jet holes, the Nux curves in the chordwise direction exhibited much different shapes due to different intensity of the interference between adjacent air jets. This work contributes to a better understanding of the jet impingement heat transfer on a concave surface in a wing leading edge, which can lead to optimal design of the aircraft anti-icing system.

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Section: Introductionmentioning

confidence: 99%

Experimental study of jet impingement heat transfer on a variable-curvature concave surface in a wing leading edge

Peng

Lin

et al. 2015

International Journal of Heat and Mass Transfer

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“…Both Reynolds and Nusselt numbers are modified to take into account the hole to hole spacing p. Then, they are based on the equivalent slot length s proposed by Jusionis [5]: (6) In this region the modified Nusselt number is averaged: (7) then a correlation with the modified Reynolds number is carried out. It is worth noting that Jusionis [5] found a data correlation of the type: (8) where , and .…”

Section: Data Correlationmentioning

confidence: 99%

“…(1), d is the hole diameter and k is the air thermal conductivity evaluated at film temperature. It is evaluated also the Nusselt number mean distribution: (5) where is the spanwise coordinate of the central jet centre and is the chordwise coordinate.…”

Section: Test Proceduresmentioning

confidence: 99%

“…The first work concerned with impinging jets as anti-icing device is perhaps that of Jusionis [5] who addressed the case of jets impinging inside a closed surface, which simulated a wing profile. He performed heat transfer measurements using thermocouples attached to the target surface and proposed as characteristic length in Nusselt and Reynolds numbers an effective slot width S* including hole diameter and hole-to-hole spacing.…”

Section: Introductionmentioning

confidence: 99%

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IR thermography in heat transfer measurements on a wing leading edge surface internally impinged by a row of air jets

Imbriale

Ianiro²,

Meola³

et al. 2012

Proceedings of the 2012 International Conference on Quantitative InfraRed Thermography

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The purpose of this work is the investigation of convective heat transfer through a row of circular air jets internally impinging on an airfoil leading edge surface for anti-icing purposes. Measurements are performed with infrared thermography applied to the heated thin foil technique. Tests are carried out by varying: diameter and mutual spacing of jets, impinging distance, Reynolds and Mach numbers. A geometrical calibration of the infrared camera is performed. Data is presented in terms of Nusselt number maps. A new data correlation is proposed between the average Nusselt number and the Reynolds number, by accounting for the impingement angle.

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“…1 A regulamentação define o envelope operacional especificando condições meteorológicas seguras para decolagem e os procedimentos obrigatórios e recomendados para determinada aeronave. Uma descrição completa sobre operação no solo em condições de gelo pode ser encontrada em HEINRICH et al (1999).…”

Section: Introductionunclassified

Modelagem e simulação da operação de sistema antigelo eletrotérmico de um aerofólio.

Silva¹

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Heat transfer from impinging gas jets on an enclosed concave surface

Cited by 21 publications

References 2 publications

Experimental study of jet impingement heat transfer on a variable-curvature concave surface in a wing leading edge

Experimental study of jet impingement heat transfer on a variable-curvature concave surface in a wing leading edge

IR thermography in heat transfer measurements on a wing leading edge surface internally impinged by a row of air jets

Modelagem e simulação da operação de sistema antigelo eletrotérmico de um aerofólio.

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