Flow Visualization and Heat Transfer Measurement in a Hypersonic Wind Tunnel

Luca, Luigi De; Cardone, Gennaro; Carlomagno, Giovanni Maria; Chevalerie, D. Aymer de la; Roquefort, T. Alziary de

doi:10.1080/08916159208946433

Cited by 27 publications

(7 citation statements)

References 2 publications

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“…Correspondingly, the heat-flux sensor may become two-dimensional as well. In particular, infrared thermography can be fruitfully employed to measure convective heat fluxes, in both steady and transient techniques [7][8][9]. Within this context, IRSR can be intrinsically considered as a thin-film sensor [5] because it generally measures skin temperatures.…”

Section: Introductionmentioning

confidence: 99%

Infrared thermography: An optical method in heat transfer and fluid flow visualisation

Astarita

Cardone

Carlomagno

2006

Optics and Lasers in Engineering

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Section: Introductionmentioning

confidence: 99%

Infrared thermography: An optical method in heat transfer and fluid flow visualisation

Astarita

Cardone

Carlomagno

2006

Optics and Lasers in Engineering

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“…The printed circuit is generally manufactured with several adjacent thin (down to 5 lm) copper tracks, closely spaced, arranged in a Greek fret mode (see Fig. 5) (2000), Dorignac et al (2001Dorignac et al ( ,2005 and Petre et al (2003) T (1990b, 1995a) HTF S/LW Gartenberg and Roberts (1991a, b), and Gartenberg and Wright (1994) T S/LW Cardone et al (1996Cardone et al ( , 1997b, Astarita et al (2002) and Astarita and Cardone ( (1990a, 1993, 1995b) (2007) T FPA/MW Rotating surfaces Cardone et al (1996Cardone et al ( , 1997a, Astarita et al (2002) and Astarita and Cardone (2008) HTF S/LW Boutarfa and Harmand (2005) and Pelle and Harmand (2006 T S -Seghir-Ouali et al (2006) T S - Mori et al (2007Mori et al ( , 2008, Sekavcnik et al (2008) and Novak et al (2008) T FPA/SW Bajcar et al (2008) T FPA/B Lyons et al (2008) TF -Separation/bluff body de Luca et al (1992Luca et al ( , 1995b TF S/LW Cardone et al (1997b) HTF S/LW Meinders et al (1997Meinders et al ( , 1999a and Meinders and Hanjalic (2002) HTF S/MW Ghisalberti and Kondjoyan (2001) HTF FPA/MW Montelpare and Ricci (2004a), Montelpare (2005, 2006) and Ricci et al (2007) HTF FPA/LW Mai et al (2008) T - Menfoukh et al (2008) T FPA/B Hypersonic flows de Luca et al (1990ade Luca et al ( , 1992…”

Section: Errors Due To the Thermal Sensormentioning

confidence: 99%

Infrared thermography for convective heat transfer measurements

2010

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This paper deals with the evolution of infrared (IR) thermography into a powerful optical tool that can be used in complex fluid flows to either evaluate wall convective heat fluxes or investigate the surface flow field behavior. Measurement of convective heat fluxes must be performed by means of a thermal sensor, where temperatures have to be measured with proper transducers. By correctly choosing the thermal sensor, IR thermography can be successfully exploited to resolve convective heat flux distributions with both steady and transient techniques. When comparing it to standard transducers, the IR camera appears very valuable because it is non-intrusive, it has a high sensitivity (down to 20 mK), it has a low response time (down to 20 ls), it is fully two dimensional (from 80 k up to 1 M pixels, at 50 Hz) and, therefore, it allows for better evaluation of errors due to tangential conduction within the sensor. This paper analyses the capability of IR thermography to perform convective heat transfer measurements and surface visualizations in complex fluid flows. In particular, it includes the following: the necessary radiation theory background, a review of the main IR camera features, a description of the pertinent heat flux sensors, an analysis of the IR image processing methods and a report on some applications to complex fluid flows, ranging from natural convection to hypersonic regime.

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“…All of the other details concerned with the viewing procedure may be found in Ref. 12. Figure 2 depicts the two optical configurations employed during the tests.…”

Section: Testing Procedures Experimental Rigmentioning

confidence: 99%

Viscous interaction phenomena in hypersonic wedge flow

Luca¹,

Cardone²,

Chevalerie³

et al. 1995

AIAA Journal

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The present paper deals with an experimental investigation carried out to study some aspects of shock/boundarylayer interaction in nominally two-dimensional hypersonic wedge flow, i.e., over flat plate/ramp configurations. These flow conditions are two dimensional only geometrically because some spanwise periodic variations of the heat flux over the ramp in the reattaching flow region are observed. The measurements, basically made by means of a computerized infrared (IR) imaging system, have been performed in a blowdown wind tunnel at Mach number equal to 7.14 and unit Reynolds number ranging from 7.6 X 10 6 to 24 x 10 6 /m. The influence of the leading-edge shape (bluntness and geometry), flat plate length, and ramp angle on the separation region, average heat transfer at reattachment, and wavelength of the heat transfer variations has been analyzed. IR results are compared to other experimental data as well as to semiempirical correlations for the heat flux peak.

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Flow Visualization and Heat Transfer Measurement in a Hypersonic Wind Tunnel

Cited by 27 publications

References 2 publications

Infrared thermography: An optical method in heat transfer and fluid flow visualisation

Infrared thermography: An optical method in heat transfer and fluid flow visualisation

Infrared thermography for convective heat transfer measurements

Viscous interaction phenomena in hypersonic wedge flow

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