Experimental study of the depressurization of C6F14 and spray characterization
type: Distribution
access URL: https://theses.hal.science/tel-00819810
format: HTML
issued: 2026-05-11T06:03:41.346555
modified: 2026-05-11T06:03:41.306230

test_moissonnage_selune
type: Agent

Experimental study of the depressurization of C6F14 and spray characterization
type: Dataset
contact point: Organization
  fn: CCSD
keyword: jet-in-vacuum
keyword: theses
keyword: phase-detection-optical-probe
keyword: desequilibre-thermodynamique
keyword: spiotherengineering-sciences-physicsother
keyword: infoeu-reposemanticsdoctoralthesis
keyword: front-debullition
keyword: anemometrie-phase-doppler
keyword: sonde-optique-a-detection-de-phase
keyword: boiling-front
keyword: jet-dans-le-vide
keyword: vaporisation-explosive
keyword: phase-doppler-anemometry
keyword: explosive-vaporization
keyword: superheat
landing page: https://theses.hal.science/tel-00819810
description: Depressurization (flashing) experiments through a ball valve were conducted with C6F14 for a large range of superheat. High-speed imaging shows a rapid and wide expansion of the jet, which evidences strong pressure gradients. Local measurements with phase detection optical probes and phase Doppler velocimetry were used to characterize size, speed, concentration and volumetric flux of drops as a function of superheat. The level of superheat has little influence on the vaporized fraction and on drop size and flux: this suggests that due to strong pressure gradients the liquid sees a much weaker level of superheat than the global superheat imposed on the system. Different scenarii are discussed to explain observations, in particular the fact that drop size remains approximately constant independent of the superheat. A scenario based on the existence of a boiling front seems to be the most consistent.
identifier: NNT: 2012GRENI059
issued: 2026-05-11T06:03:41.344070
language: fr
modified: 2026-05-11T06:03:41.344075