Numerical evaluation of entropy generation in isolated airfoils and Wells turbines
Ghisu T.;Cambuli F.;Puddu P.;Mandas N.;SESHADRI, PRANAY;
2018-01-01
Abstract
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.File | Size | Format | |
---|---|---|---|
Ghisu2018_Article_NumericalEvaluationOfEntropyGe.pdf Solo gestori archivio
Type: versione editoriale
Size 4.24 MB
Format Adobe PDF
|
4.24 MB | Adobe PDF | & nbsp; View / Open Request a copy |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.