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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

DESCRIPTION OF A NEW WIND TUNNEL TO STUDY HEAT TRANSFER PHENOMENA IN A GAS MIXTURE AT LOW PRANDTL NUMBER

Get access (open in a dialog) DOI: 10.1615/IHTC16.cov.022376
pages 3453-3460

要約

In advanced nuclear reactors, liquid metals characterized by a low Prandtl number, are considered as primary coolant due to their high conductivity. The simulation using standard RANS approach of the turbulent heat transfer has some weaknesses because the constant turbulent Prandtl number approximation generally used is tested on fluids having a Prandtl number close or greater than 1. Turbulent heat transfer in liquid metals will be better predicted with advanced new turbulence models that can be validated using experimental values of velocity and temperature fluctuations. These fluctuations are difficult to obtain in opaque liquid metals. For this purpose, a new wind tunnel has been designed and constructed at the von Karman Institute to acquire experimental data on two test cases with a gas mixture of noble gases (transparent fluid). The first test case is a non-confined backward facing step (BFS) and the second configuration consists of a non-confined free jet (JET) both with thermal effects. The flow mixture consists of a mixture of Helium and Xenon. First measurements data obtained with air validate the design of the facility.