Abstract
Thermal fatigue issue is of concern when two flows with large temperature differences are mixing. In this study, a hot cylindrical pipe flow comes out in a cold main straight channel flow through an orthogonal junction to experimentally reproduce thermal stresses. This work aims to investigate temperature fields at the wall of two turbulent water flows mixing at a low velocity ratio (i.e. secondary pipe flow velocity to main flow velocity ratio). As infrared measurements are difficult to perform because of the semi-transparent properties of liquid water, we focus on the development of a specific infrared thermography procedure to get wall temperature fields downstream of the mixing region.
Published Version
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