X-ray Diagnostics for Cavitating Nozzle Flow

Daniel J. Duke, Andrew B. Swantek, Alan L. Kastengren, Christopher F. Powell

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

13 Citations (Scopus)

Abstract

Cavitation plays a critical role in the internal flow of nozzles such as those used in direct fuel injection systems. However, quantifying the vapor fraction in the nozzle is difficult. The gas-liquid interfaces refract and multiply scatter visible light, making quantitative extinction measurements difficult. X-rays offer a solution to this problem, as they refract and scatter only weakly. In this paper, we report on current progress in the development of several x-ray diagnostics for cavitating nozzle flows. X-ray radiography experiments undertaken at the Advanced Photon Source at Argonne National Laboratory have provided measurements of total projected void fraction in a 500 μm submerged nozzle, which have been directly compared with numerical simulations. From this work, it has been shown that dissolved gases in the liquid also result in the formation of vapor regions, and it is difficult to separate these multiple phenomena. To address this problem, the liquid was doped with an x-ray fluorescent bromine tracer, and the dissolved air substituted with krypton. The fluorescent emission of Br and Kr at x-ray wavelengths provide a novel measurement of both the total void fraction and the dissolved gas component, allowing both cavitation and dissolved gas contributions to be measured independently. [199/200 words].

Original languageEnglish
Title of host publicationJournal of Physics
Subtitle of host publicationConference Series
EditorsMohamed Farhat, Andreas Müller
Place of PublicationBristol UK
PublisherIOP Publishing
Number of pages4
Volume656
DOIs
Publication statusPublished - 3 Dec 2015
Externally publishedYes
EventInternational Symposium on Cavitation 2015 - Lausanne, Switzerland
Duration: 6 Dec 201510 Dec 2015
Conference number: 9th
https://archiveweb.epfl.ch/cav2015.epfl.ch/

Publication series

NameJournal of Physics: Conference Series
PublisherIOP Publishing
NumberConference 1
Volume656
ISSN (Print)1742-6588

Conference

ConferenceInternational Symposium on Cavitation 2015
Abbreviated titleCAV2015
CountrySwitzerland
CityLausanne
Period6/12/1510/12/15
Internet address

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