The present paper deals with the ice-formation in a planar nozzle with a convergence angle of 2.5 deg. First experiments have been carried out for different wall cooling parameters B in the range between 4 to 18 and for different flow rate Reynolds numbers in the range of 5000 < Re4h < 46000. For all these experiments only smooth ice-layers could be observed. However, in a cooled parallel plate channel or a diffuser, normally wavy ice-layers are observed for the parameter range reported above. This interesting result can be seen as a first justification for the hypothesis (which has been stated in literature) that the formation of wavy ice-layers is caused by flow laminarisation (due to the rapid growth in ice-layer thickness with increasing axial position from the inlet) and retransition to the fully turbulent state (after the ice-layer thickness reaches a nearly constant value). Thus, wavy ice-layers might be suppressed by superimposing flow acceleration.
- Heat Transfer Division and Electronic and Photonic Packaging Division
Experimental Investigation of the Ice-Formation in a Planar Nozzle With Forced Convection Flow
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Weigand, B, Zehner, S, Knapp, A, & Braun, R. "Experimental Investigation of the Ice-Formation in a Planar Nozzle With Forced Convection Flow." Proceedings of the ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. Heat Transfer: Volume 2. San Francisco, California, USA. July 17–22, 2005. pp. 379-385. ASME. https://doi.org/10.1115/HT2005-72062
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