Thermographic Investigation of Some Surface Flow Patterns
Issue title: International Conference on Optical Technology
and Image Processing in Fluid, Thermal, and Combustion Flow, Yokohama, Japan,
December 1998
Affiliations: Università degli Studi di Napoli "Federico II,"
Dipartimento di Energetica, Termofluidodinamica Applicata e Condizionamenti
Ambientali (D.E.T.E.C.), P.le Tecchio 80, 125 Napoli, Italy e-mail:
[email protected]
Abstract: Infrared (IR) thermography, due to its two-dimensionality and
non-contact character, can be usefully employed in a vast variety of heat
transfer industrial applications as well as research fields. The present work
deals with measurements of temperature and/or convective heat transfer
coefficients in several types of fluid flow configurations studied by means of
the IR scanning radiometer applied to the heated-thin-foil technique. In more
details, it is analysed the capability of the infrared system to study
particular phenomena such as: the heat transfer, including the spiral vortical
structures developing at transition, over a disk rotating in still air; the
thermal exchange enhancement induced by a jet centrally impinging on the
rotating disk; the complex heat transfer pattern associated with a jet in
cross-flow.
Keywords: flow visualization, infrared thermography, temperature measurements, convective heat transfer
