Affiliation:
1. Institute of Thermal Power Engineering, Faculty of Mechanical Engineering, Cracow University of Technology, Cracow, Poland
Abstract
To increase the efficiency, elliptical tubes are often used in cross-flow
heat exchangers. For these kinds of heat exchangers the flow field in the
tubes exhibits irregularities. Therefore, various flow regimes can be
observed: the turbulent, the transitional, and even the laminar one.
Therefore, applying typical turbulence models for numerical calculations may
cause significant errors, when flow in the heat exchanger tubes is in the
transitional or laminar regime. Hence, the average values of flow velocities
and temperature in heat exchanger tubes can be calculated incorrectly. The
paper presents empirical verification of applying the basic two-equation
turbulence models for a transitional flow of water in an elliptical pipe of
a heat exchanger.
Publisher
National Library of Serbia
Subject
Renewable Energy, Sustainability and the Environment
Cited by
1 articles.
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