Numerical Evaluation of Entropy Generation in Isolated Airfoils and Wells Turbines
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Ghisu, T., Cambuli, F., Puddu, P., Mandas, N., Seshadri, P., & Parks, G. (2018). Numerical Evaluation of Entropy Generation in Isolated Airfoils and Wells Turbines. Meccanica, 56 (14), 3437-3456. https://doi.org/10.1007/s11012-018-0896-1
In recent years, a number of authors have studied entropy generation in Wells turbines. This is potentially a very interesting topic, as it can provide important insights into the irreversibilities of the system, as well as a methodology for identifying, and possibly minimizing, the main sources of loss. Unfortunately, the approach used in these studies contains some crude simplifications that lead to a severe underestimation of entropy generation and, more importantly, to misleading conclusions. This paper contains a re-examination of the mechanisms for entropy generation in fluid flow, with a particular emphasis on RANS equations. An appropriate methodology for estimating entropy generation in isolated airfoils and Wells turbines is presented. Results are verified for different flow conditions, and a comparison with theoretical values is presented.
Regione Autonoma Sardegna (funding for University of Cagliari co-authors)
External DOI: https://doi.org/10.1007/s11012-018-0896-1
This record's URL: https://www.repository.cam.ac.uk/handle/1810/280106