Abstract
Temperatures, velocities, and droplet sizes are measured in turbulent condensing steam jets produced by a facial sauna, for varying nozzle diameters and varying initial velocities (Re=3,600–9,200). The release of latent heat due to droplet condensation causes the temperature in the two-phase jet to be significantly higher than in a single-phase jet. At some distance from the nozzle, droplets reach a maximum size and start to evaporate again, which results in a change in sign of latent heat release. The distance of maximum size is determined from droplet size measurements. The experimental results are compared with semi-analytical expressions and with a fully coupled numerical model of the turbulent condensing steam jet. The increase in centreline temperature due to droplet condensation is successfully predicted.
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Received: 5 April 2000 / Accepted: 15 November 2000
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Oerlemans, S., Badie, R. & Van Dongen, M. An experimental and numerical study into turbulent condensing steam jets in air. Experiments in Fluids 31, 74–83 (2001). https://doi.org/10.1007/s003480000261
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DOI: https://doi.org/10.1007/s003480000261