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dc.contributor.authorJavidmand, Puya
dc.contributor.authorHoffmann, Klaus A.
dc.identifier.citationJavidmand, Puya; Hoffmann, Klaus A. 2016. A comprehensive modeling of choked two-phase flow through short-tube orifices with application to alternative refrigerants HFO-1234yf and HFO-1234ze. International Journal of Refrigeration, vol. 69, September 2016:pp 114–135en_US
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractDue to the evaporating two-phase flow and the choked-flow condition, numerical analysis of flow through short-tube orifices is a complicated procedure. A comprehensive method for analyzing such flows is the two-fluid model, which does not assume equilibrium between phases. However, in all previous applications of this model, two-phase flow calculations at the entrance and vena contracta regions were eliminated. In this investigation, two additional steps were introduced to improve the accuracy of computations: (1) applying a comprehensive two-fluid model, including the effect of various two-phase flow patterns and the metastability of liquid phase; and (2) performing a two-phase analysis of the evaporating flow through the entrance and vena contracta, which involves simulation of this region as a contraction from the up-stream to the throat, and an expansion from the throat to downstream. Results showed more compatibility with experimental data in comparison with those of previous investigations for predicting the critical flow condition of common refriger antsHFC-134a, HCFC-22, and HFC-410a through short-tube orifices. In addition, the developed numerical scheme was utilized in order to develop selection charts for short-tube orifices based on the common refrigerant HFC-134a and the alternative newly released hydrofluoroolefin refrigerants HFO-1234yf and HFO-1234ze.en_US
dc.publisherElsevier Ltd.en_US
dc.relation.ispartofseriesInternational Journal of Refrigeration;v.69
dc.subjectShort-tube orificeen_US
dc.subjectTwo-fluid modelen_US
dc.subjectGlobal warmingen_US
dc.titleA comprehensive modeling of choked two-phase flow through short-tube orifices with application to alternative refrigerants HFO-1234yf and HFO-1234zeen_US
dc.rights.holder(c) 2016 Elsevier Ltd and IIR. All rights reserved.en_US

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    Research publications authored by the Department of Aerospace Engineering faculty and graduate students.

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