Implementation of a new thermal model and static calibration of a wedge-shaped hot-film probe in a constant-temperature mode

M. Krause, U. Gaisbauer, E. Kraemer, A. D. Kosinov

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

4 Цитирования (Scopus)

Аннотация

Wedge-shaped hot-films are a promising alternative to hot-wires for supersonic free flow disturbance measurements if hot-wires cannot be used due to harsh flow conditions. Up to the present, wedge hot-films could not serve as quantitative tools because of an insufficient modelling of the substrate's influence on the thermal balance. The present paper shows a static calibration of a wedge-shaped hot-film sensor that is based on a combination of an analytical, a numerical and an experimental approach. The substrate's impact was analysed by the help of CFD simulations and modelled by a newly introduced substrate factor. The obtained sensitivities were discussed and qualitatively explained compared with standard hot-wires. A quantitative comparison of experimentally detected mass flux fluctuations proved the wedge hot-film data to match similar hot-wire results very well. The presented approach has the potential to upgrade hot-films of various shapes to tools for quantitative fluctuation measurements.

Язык оригиналаанглийский
Страницы (с-по)1-9
Число страниц9
ЖурналInternational Journal of Heat and Mass Transfer
Том126
DOI
СостояниеОпубликовано - ноя 2018
Опубликовано для внешнего пользованияДа

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