The influence of temperature and pressure on macro- and micro-mixing in compressed fluid flows; mixing of carbon dioxide and ethanol above their mixture critical pressure

Bassing, Daniel; Braeuer, Andreas

doi:10.1016/j.supflu.2020.105036

Cited by 8 publications

(2 citation statements)

References 58 publications

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“…The symmetrical energy-gathering cover will generate pressure collision and compress the detonation gas to the cumulative direction. The entire energy-gathering jet will completely penetrate the coal-rock mass in a very short amount of time, and the energy will form a penetrating initial crack along the diameter direction, which in turn will guide subsequent crack propagation., The velocity of the cumulative jet can be expressed as follows: u j = u 0 cos ( γ 2 − ω − δ ) sin nobreak0em.25em⁡ γ 2 where u j is the jet velocity (m/s), u 0 is the closing speed (m/s), γ is the closure angle, ω is the half cone angle, and δ is the deformation angle. The explosion stress wave action stage …”

Section: Theory and Methodsmentioning

confidence: 99%

Prediction of the Penetration Radius of Cumulative Blasting

Jia

Zhao³

et al. 2023

ACS Omega

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To improve the efficiency of coal seam gas extraction, the influence characteristics of different factors on the penetration effect of cumulative blasting were determined and the hole spacing was effectively predicted; in this work, we used ANSYS/LS-DYNA numerical simulation software to establish the penetration model of cumulative blasting. Combined with an orthogonal design scheme, the crack radius prediction of cumulative blasting was studied. A prediction model for predicting the fracture radius of cumulative blasting based on three groups of different factors was established. The results showed that the primary and secondary order of factors that affected the fracture radius of cumulative blasting was as follows: ground stress > gas pressure > coal firmness coefficient. The penetration effect decreased with increasing ground stress and decreased with an increase in the gas pressure and coal firmness coefficient. The industrial field test was carried out. The gas extraction concentration increased by 73.4% after cumulative blasting, and the effective crack radius of cumulative blasting was approximately 5.5−6 m. The maximum error of the numerical simulation was 1.2%, and the maximum error of the industrial field test was 6.22%, which proved that the crack radius prediction model of cumulative blasting was correct.

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Section: Theory and Methodsmentioning

confidence: 99%

Prediction of the Penetration Radius of Cumulative Blasting

Jia

Zhao³

et al. 2023

ACS Omega

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“…It is true that the information-rich finger print region (0-1800 cm -1 ) of the Raman spectrum is still detectable with this configuration! But there are many examples, let it be in medicine [15][16][17] or in process engineering [3,18,19], where most interesting information was extracted not from the finger-print region, but from the spectral range exceeding 1800 cm -1 . Remember that this spectral range is not detectable with silicon-based detectors in the case of NIR excitation wavelengths.…”

Section: Introductionmentioning

confidence: 99%

Raman Fiber Bundle Probe of Individually Filter-Coated Fibers

Tesfay¹,

Knipfer²,

Siegfried³

2021

Int J Opt Photonic Eng

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We report how we had a Raman fiber bundle probe with individually filter-coated fibers manufactured by organizing an iterative production process between one fiber coating and one fiber bundling company. Short-and long pass filters had directly been deposited at the ends of the excitation and detection fibers, before the single fibers were configured to a 6-around-1 fiber bundle. We found that the performance of the fiber bundle probe with individually filter-coated fibers, with respect to signal detection and suppression of elastically scattered light, is similar to a free-beam Raman reference probe. The demonstration of a Raman fiber bundle probe with individually filter-coated fibers paves the way for the development of fiber bundle Raman probes suitable for several excitation and detection channels.

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Visualization of dynamic phase mixing and equilibrium process in transcritical and supercritical conditions

Yang

Chen

2023

Flow Measurement and Instrumentation

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The influence of temperature and pressure on macro- and micro-mixing in compressed fluid flows; mixing of carbon dioxide and ethanol above their mixture critical pressure

Cited by 8 publications

References 58 publications

Prediction of the Penetration Radius of Cumulative Blasting

Prediction of the Penetration Radius of Cumulative Blasting

Raman Fiber Bundle Probe of Individually Filter-Coated Fibers

Visualization of dynamic phase mixing and equilibrium process in transcritical and supercritical conditions

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