Abstract
We have developed a Laser Doppler Anemometry (LDA) system for measuring velocity profiles in cryogenic fluids. The precision of the system, whereby velocities can be measured between 0.05 mm/sec and 40 m/sec over a sample volume of 100μ diameter, enables boundary layer flows in cryogenic vapours and liquids to be studied for the first time. We have also developed a micro-thermometer technique for measuring temperature profiles inside boundary layer flows. Results using liquid nitrogen are presented for(avapour column flow at different horizontal planes(bconvective flow in an evaporating liquid nitrogen pool(cboundary layer flow in a liquid at a vertical cylindrical heater.
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Schedule a callMore From: Proceedings of the Ninth International Cryogenic Engineering Conference Kobe, Japan 11–14 May 1982
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