A quantitative speed of sound database for multi-component jet mixing at high pressure

Baab, Steffen; Steinhausen, Christoph; Lamanna, Grazia; Förster, Felix J.

doi:10.1016/j.fuel.2017.12.080

Cited by 14 publications

(21 citation statements)

References 33 publications

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“…Baab et al [7] experimentally investigated different binary mixtures under supercritical conditions. For the numerical investigations we have chosen the n-hexane/nitrogen case.…”

Section: Numerical Results: Les Of N-hexane/nitrogen Jetmentioning

confidence: 99%

“…Keeping the latter in mind, the situation changes for the examination of fluid jets with low exit velocities. For this purpose, the speed of sound database for the subsonic high-pressure jets from Baab et al [7] is evaluated with respect to the applicability of the adiabatic mixing assumption. The results are illustrated in Fig.…”

Section: Phenomenological Considerations On Mixing Jetsmentioning

confidence: 99%

“…Here, it is assumed that the omission of heat fluxes lead to an overestimation of mixing temperatures. For the correlation of speed of sound to species concentration, this means that the optimiza- [7] tion scheme from Eqs. (1) and (2) is evaluated on a higher temperature level, which consequently leads to an overprediction of concentration.…”

Section: Phenomenological Considerations On Mixing Jetsmentioning

confidence: 99%

“…In this context, Baab et al [6,7] and Förster et al [13] performed supercritical injection studies in order to deliver quantitative jet mixing data. Using laser-induced thermal acoustics (LITA), they measured the local speed of sound in high-pressure injection with varying temperature and ambient pressure.…”

Section: Introductionmentioning

confidence: 99%

“…This work was extended to handle multi-component CFD simulations near the critical point with phase-transition. The developments and tools mentioned are used to simulate a specific experimental setup proposed in [7]. The numerical results are interpreted in the context of Ma et al [25].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

On the Consideration of Diffusive Fluxes Within High-Pressure Injections

Föll

Gerber

Munz

et al. 2020

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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Mixing characteristics of supercritical injection studies were analyzed with regard to the necessity to include diffusive fluxes. Therefore, speed of sound data from mixing jets were investigated using an adiabatic mixing model and compared to an analytic solution. In this work, we show that the generalized application of the adiabatic mixing model may become inappropriate for subsonic submerged jets at high-pressure conditions. Two cases are discussed where thermal and concentration driven fluxes are seen to have significant influence. To which extent the adiabatic mixing model is valid depends on the relative importance of local diffusive fluxes, namely Fourier, Fick and Dufour diffusion. This is inter alia influenced by different time and length scales. The experimental data from a high-pressure n-hexane/nitrogen jet injection were investigated numerically. Finally, based on recent numerical findings, the plausibility of different thermodynamic mixing models for binary mixtures under high pressure conditions is analyzed.

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“…Baab et al [7] experimentally investigated different binary mixtures under supercritical conditions. For the numerical investigations we have chosen the n-hexane/nitrogen case.…”

Section: Numerical Results: Les Of N-hexane/nitrogen Jetmentioning

confidence: 99%

Section: Phenomenological Considerations On Mixing Jetsmentioning

confidence: 99%

Section: Phenomenological Considerations On Mixing Jetsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

On the Consideration of Diffusive Fluxes Within High-Pressure Injections

Föll

Gerber

Munz

et al. 2020

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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Towards a Direct Numerical Simulation of Primary Jet Breakup with Evaporation

Reutzsch

Ertl

Baggio

et al. 2019

High Performance Computing in Science and Engineering ' 18

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On the potential and challenges of laser-induced thermal acoustics for experimental investigation of macroscopic fluid phenomena

et al. 2020

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Mixing and evaporation processes play an important role in fluid injection and disintegration. Laser-induced thermal acoustics (LITA) also known as laser-induced grating spectroscopy (LIGS) is a promising four-wave mixing technique capable to acquire speed of sound and transport properties of fluids. Since the signal intensity scales with pressure, LITA is effective in high-pressure environments. By analysing the frequency of LITA signals using a direct Fourier analysis, speed of sound data can be directly determined using only geometrical parameters of the optical arrangement no equation of state or additional modelling is needed at this point. Furthermore, transport properties, like acoustic damping rate and thermal diffusivity, are acquired using an analytical expression for LITA signals with finite beam sizes. By combining both evaluations in one LITA signal, we can estimate mixing parameters, such as the mixture temperature and composition, using suitable models for speed of sound and the acquired transport properties. Finally, direct measurements of the acoustic damping rate can provide important insights on the physics of supercritical fluid behaviour. Graphic Abstract

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A quantitative speed of sound database for multi-component jet mixing at high pressure

Cited by 14 publications

References 33 publications

On the Consideration of Diffusive Fluxes Within High-Pressure Injections

On the Consideration of Diffusive Fluxes Within High-Pressure Injections

Towards a Direct Numerical Simulation of Primary Jet Breakup with Evaporation

On the potential and challenges of laser-induced thermal acoustics for experimental investigation of macroscopic fluid phenomena

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