Visualizing the expanding flow of gas from helium-jet and ion-guide nozzles

Rasi, M.; Saintola, R.; Valli, K.

doi:10.1016/0168-9002(96)00167-2

Cited by 7 publications

(2 citation statements)

References 8 publications

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“…This is certainly the most studied feature in the literature, be it experimentally [12,30,35,40,43,49,51,[56][57][58][59]62,64,, theoretically [13,29,67,76,78,[95][96][97][98][99][100][101][102][103][104][105][106][107][108][109] or numerically [14,20,22,34,41,59,63,75,81,82,84,91,[110][111][112][113][114][115][...…”

Section: The Mach Diskmentioning

confidence: 99%

Free underexpanded jets in a quiescent medium: A review

Franquet

Perrier

Gibout

et al. 2015

Progress in Aerospace Sciences

242

113

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Section: The Mach Diskmentioning

confidence: 99%

Free underexpanded jets in a quiescent medium: A review

Franquet

Perrier

Gibout

et al. 2015

Progress in Aerospace Sciences

242

113

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“…Although electron beam-excited fluorescence is suited for the characterization of lowdensity flows [35], it cannot be applied for the extraction of the spectral broadening of the seeded atoms, since it characterizes the properties of the carrier gas. Another method, that has been applied for the visualization of helium and argon jets, is the fluorescence excitation by an electrical discharge [36,37]. On the other hand, planar laser-induced fluorescence (PLIF) spectroscopy [38] makes it possible to extract two-dimensional temperature flow fields of jets (demonstrated for helium, argon, and heated air) and flames (methane-air) seeded with molecular species (NO, O 2 ) [39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Supersonic Gas Jets for High-Resolution Laser Ionization Spectroscopy of Heavy Elements

et al. 2018

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The method of laser spectroscopy in supersonic gas jets was proposed for high-resolution and highefficiency in-gas laser ionization and spectroscopy studies of short-lived nuclei. The flow properties of such supersonic gas jets have been characterized under off-line conditions. Planar laser-induced fluorescence spectroscopy of seeded copper atoms has been applied to nonintrusively measure velocity, temperature, and relative density profiles of gas jets formed by different de Laval nozzles. For validation, planar laserinduced fluorescence spectroscopy was applied on supersonic free jets with well-known flow parameters. The performance of the in-gas-jet laser spectroscopy method is determined by the achievable spectral resolution, which requires an optimization and a precise manufacturing of the nozzle inner contour as well as a pressure matching of the background medium at the nozzle exit. Our studies now enable a thorough understanding and quantification of these requirements and a determination of the final performance of the in-gas-jet method. Additionally, a comparison between the experimental results and the numerical calculations was performed for the temperature, velocity, and Mach number profiles of underexpanded and quasiuniform jets formed by a de Laval nozzle.

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