Three-dimensional reconstruction of a microjet with a Mach disk by Mach–Zehnder interferometers

Sugawara, Sotaro; Nakao, Shinichiro; Miyazato, Yoshiaki; Ishino, Yuji; Miki, Kenji

doi:10.1017/jfm.2020.217

Cited by 14 publications

(10 citation statements)

References 66 publications

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“…The structured mesh is generated by the mapped face meshing function equipped with ANSYS Fluent, and the total mesh count is approximately 50 thousand elements. In our previous studies (Sugawara et al 2020), we performed the grid sensitivity analysis and confirmed that the numerical solutions converged for this resolution. Inside the nozzle, the grid spacing smoothly reduces in the radial direction to capture the thin boundary layer.…”

Section: Methodssupporting

confidence: 69%

“…The time integration is performed using the three-stage Runge-Kutta method. It should be kept in mind that the previous study of Sugawara et al (2020) for a microjet with a Mach disk, which was performed under a condition of NPR = 4.0, showed that there is an excellent quantitative agreement between the experiment and the simulation for three representative streamwise density profiles at the jet centerline, the lipline and the intermediate line between them.…”

Section: Methodsmentioning

confidence: 83%

“…12 Various visual representation of microjet with weak shocks referred to as the circular-cutoff schlieren (Settles and Hargather 2017), express the magnitude of the density gradient vector, and it indicates the degree of compression and expansion in the every direction. In addition, this technique sometimes can effectively capture the flow topology of three-dimensional shock structure (Maeno et al 2005;Li et al 2018;Sugawara et al 2020). As shown in Fig.…”

Section: Various Visual Representation For Flow Field Of Microjetmentioning

confidence: 99%

“…Most recently, Sugawara et al (2020) applied MZI for a microjet with a Mach disk to diagnose three-dimensional jet density fields and to reveal the flow topology of the shock system in the near-field region. As a counterpart of our previous studies, we pay a special attention on a supersonic microjet including "weak shocks", through which total pressure losses are considered to be negligible.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Quantitative Flow Visualization of Slightly Underexpanded Microjets by Mach–Zehnder Interferometers

Sugawara

Nakao

Miyazato

et al. 2020

Flow Turbulence Combust

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The Mach–Zehnder interferometer with the finite fringe setting is applied for a shock-containing microjet issued from an axisymmetric convergent nozzle with an inner diameter of 1.0 mm at the exit. Experiments are performed at a nozzle pressure ratio of 3.0 to produce a slightly underexpanded sonic jet where the Reynolds number, based upon the diameter and flow properties at the nozzle exit, is $$4.45 \times 10^4$$ 4.45 × 10 4 . The reconstruction of the jet density field is performed using the Abel inversion method under the assumption of an axisymmetric flow as well as the Fourier transform method for the phase shift analyses of interferograms. The three-dimensional density field of a shock-containing microjet can be captured with a spatial resolution of 4 $$\upmu$$ μ m, and the near-field shock structure inside the jet plume is shown in the density contour plot at the cross-section including the jet centerline. In addition, the density field of the microjet is illustrated with various techniques, including representation such as the vertical-knife-edge schlieren, the horizontal-knife-edge schlieren, the bright-field schlieren, and the shadowgraphy. In addition to experiments, the Reynolds averaged Navier–Stokes (RANS) simulation with the SST k–$$\omega$$ ω turbulence model is carried out to model the microjets, and a quantitative comparison with the experiments is performed. The jet centerline density profile obtained by the present experiment is quantitatively compared with those from the previous Mach–Zehnder interferometer, the background oriented schlieren, as well as the RANS simulation.

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Section: Methodssupporting

confidence: 69%

Section: Methodsmentioning

confidence: 83%

Section: Various Visual Representation For Flow Field Of Microjetmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quantitative Flow Visualization of Slightly Underexpanded Microjets by Mach–Zehnder Interferometers

Sugawara

Nakao

Miyazato

et al. 2020

Flow Turbulence Combust

Self Cite

View full text Add to dashboard Cite

show abstract

“…Shadow et al [7] and Zaman [8] showed the compressible spreading rates and mixing characteristics of supersonic coaxial jets. Katanoda et al [9] [10] explained the effects of the nozzle divergence angle and Mach number on the shock cell length, and Sugawara et al [11] showed the structure of three-dimensional microjet with a Mach disc by Mach-Zender in interferometer.…”

Section: Introductionmentioning

confidence: 99%

Flow Characteristics of Two-Dimensional Supersonic Under-Expanded Coanda-Reattached Jet

Ohmura¹,

Shakouchi²,

Fukushima³

et al. 2021

JFCMV

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Study of Supersonic Microjet from a Square Convergent Nozzle by the Mach-Zehnder Interferometer

Sakanashi

Nakao

Miyazato

et al. 2021

Computational and Experimental Simulations in Engineering

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Three-dimensional reconstruction of a microjet with a Mach disk by Mach–Zehnder interferometers

Cited by 14 publications

References 66 publications

Quantitative Flow Visualization of Slightly Underexpanded Microjets by Mach–Zehnder Interferometers

Quantitative Flow Visualization of Slightly Underexpanded Microjets by Mach–Zehnder Interferometers

Flow Characteristics of Two-Dimensional Supersonic Under-Expanded Coanda-Reattached Jet

Study of Supersonic Microjet from a Square Convergent Nozzle by the Mach-Zehnder Interferometer

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