An equation for calculation of the thermal conductivity of gases and liquids

Вассерман, А. А.; Nedostup, V. I.

doi:10.1007/bf00868593

Cited by 16 publications

(2 citation statements)

References 6 publications

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“…The SRK EOS does well to predict the real-gas thermodynamics near the critical point, and is more accurate than the PR EOS in the low-temperature region. The dynamic viscosity and thermal conductivity are estimated using the model of Zeberg-Mikkelsen et al 40) and Vasserman and Nedostup, 41) respectively. Spatial derivative terms in the governing equations are evaluated using the SLAU scheme 42) of AUSM family upwind-biased schemes.…”

Section: Methodsmentioning

confidence: 99%

Effects of a Recess on Supercritical Co-Flowing Planar Jets

Muto

Terashima

Tsuboi³

2019

Trans. Japan Soc. Aero. S Sci.

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The effects of a recess on co-flowing planar jets under supercritical pressure are numerically studied. Two-dimensional hybrid LES/RANS simulations are performed in a wide range of recess lengths and injection momentum flux ratios, which are important design parameters for liquid rocket engine injectors. The present study showed that confinement effects of the near-injector flowfield by applying a recess, suppress outer jet spreading and thus enhances the penetration of the outer jet flow into the inner jet. The enhanced penetration of the outer jet flow results in the appearance of flapping motions in the inner jet. Low-frequency oscillations corresponding to the flapping motions clearly appear in the case of recessed injectors. Moreover, the confinement effects promote interactions between vortex structures resulting in vortex breakdown. Consequently, the inner-jet length is shortened, indicating an improvement in mixing when a recess is applied. The present results also show that the inner-jet length deceases as the recess length increases, and the effects of a recess remarkably appear at higher momentum flux ratios. This is explained by the vortices generated behind the post lip that is strengthened as the result of increased velocity ratio.

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Section: Methodsmentioning

confidence: 99%

Effects of a Recess on Supercritical Co-Flowing Planar Jets

Muto

Terashima

Tsuboi³

2019

Trans. Japan Soc. Aero. S Sci.

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“…The thermodynamic properties, such as the specific enthalpy and internal energy and are calculated based on the real-gas equation of state, and the detailed derivation process is available in Kim et al [29]. The transport properties including the viscosity and thermal conductivity are predicted by the model of Zeberg-Mikkelsen et al [30] and Vasserman et al [31], respectively. By using the SRK and ideal gas EOS, the density, constant-pressure specific heat, thermal conductivity and viscosity are plotted and shown in Fig.…”

Section: Governing Equations and Equation Of Statesmentioning

confidence: 99%

Numerical study on the mixing characteristics under transcritical and supercritical injection using large eddy simulation

Dong

Qin

et al. 2022

THERM SCI

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Large eddy simulations of cryogenic nitrogen injection are performed on both transcritical and supercritical injection and mainly attentions are focus on the jet disintegration mechanism and mixing layer feature. The simulation results reveal that the thermal disintegration mechanical dominates the disintegration characteristic under supercritical conditions. The jet disintegration is delayed and longer dense core region is detected for the transcritical injection due to the large density gradient effects. Because of this disintegration mechanism, the Reynolds stresses in the transcritical case are significantly suppressed in the turbulent fluctuation. In addition, we define a mixing layer based on the density gradient and thicker mixing layer interfaces are formed in the supercritical case. The relationship between transport properties and the large density gradient are also investigated, results indicate that the large density gradients are influenced by the pseudo critical temperature and transport properties.

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