Investigation on oblique shock waves occurred in the supersonic carbon dioxide two-phase flow

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dc.contributor.author Kawamura, Yosuke
dc.contributor.author Nakagawa, Masafumi
dc.date.accessioned 2015-04-09T11:53:06Z
dc.date.available 2015-04-09T11:53:06Z
dc.date.issued 2012
dc.description.abstract Paper presented at the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012. en_ZA
dc.description.abstract In the refrigeration systems using the two-phase flow ejector, it is important to understand expansion waves and shock waves which are generated at the outlet of the nozzle. The theoretical oblique shock wave relations are derived for extreme conditions. Numerical analysis of the oblique twophase flow is also presented. Two types of two dimensional convergent-divergent nozzles with and without the inclined wall are used to measure pressure profiles along the nozzles wall. The two-phase flow in the divergent section of the nozzle obviously exhibits the supersonic decompression behavior. Numerical results can represent the experimental results with fairly good precision, but the reflections of the oblique shock wave cannot be predicted. The diameter of the droplet in twophase flow in the nozzle is guessed by this experiment to be the order of 5 [μm] and momentum frozen phenomenon occurs in this situation. The experimental oblique shock wave has the particular character of the two-phase flow, which is never seen in single phase flow explained by gas dynamics. The observation of the present study reveals the intrinsic feature that appears only in the supersonic two-phase flow. en_ZA
dc.description.librarian dc2014 en_ZA
dc.format.extent 7 pages en_ZA
dc.format.medium PDF en_ZA
dc.identifier.citation Kawamura, Y & Nakagawa, M 2012, Investigation on oblique shock waves occurred in the supersonic carbon dioxide two-phase flow, Paper presented to the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012. en_ZA
dc.identifier.isbn 9781868549863
dc.identifier.uri http://hdl.handle.net/2263/44307
dc.language.iso en en_ZA
dc.publisher International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics en_ZA
dc.relation.ispartof HEFAT 2012 en_US
dc.rights University of Pretoria en_ZA
dc.subject Refrigeration system en_ZA
dc.subject Two-phase flow ejector en_ZA
dc.subject Expansion waves en_ZA
dc.subject Shock waves en_ZA
dc.subject Divergent nozzles en_ZA
dc.subject Supersonic decompression behavior en_ZA
dc.title Investigation on oblique shock waves occurred in the supersonic carbon dioxide two-phase flow en_ZA
dc.type Presentation en_ZA


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