Developing flow map for two-phase R134a after expansion device

Chad D. Bowers, Predrag S. Hrnjak

Research output: Contribution to journalArticlepeer-review


This paper presents a mapping of developing adiabatic two-phase R134a flow directly after the expansion valve until the flow is "fully developed" in a 15.3mm inner diameter pipe. Flow characteristics of separation distance, flow type in the homogenous region, void fraction as a function of tube length, and fully developed flow region void fraction and regime were quantified and described.

Original languageEnglish (US)
JournalSAE Technical Papers
StatePublished - 2008

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering


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