Thermodynamic modeling based on a generalized cubic equation of state for kerosene/LOx rocket combustion

Kim, Seong-Ku; Choi, Hwan-Seok; Kim, Yongmo

doi:10.1016/j.combustflame.2011.10.008

Cited by 134 publications

(47 citation statements)

References 21 publications

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“…For the species under study, SRK EoS is found superior to PR EoS. However, Kim et al recently showed that a threeparameter EoS coupling SRK and PR leads to better results for kerosene/LOx combustion than the only use of SRK or PR EoS [10]. Figure 5 Relative error ǫr (a) of saturated vapor pressure of nitrogen, P …”

Section: Progress In Propulsion Physicsmentioning

confidence: 99%

Simulation of supercritical flows in rocket-motor engines: application to cooling channel and injection system

Ribert

Taïeb

Petit

et al. 2013

Progress in Propulsion Physics

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To address physical modeling of supercritical multicomponent §uid §ows, ideal-gas law must be changed to real-gas equation of state (EoS), thermodynamic and transport properties have to incorporate dense §uid corrections, and turbulence modeling has to be reconsidered compared to classical approaches. Real-gas thermodynamic is presently investigated with validation by NIST (National Institute of Standards and Technology) data. Two major issues of Liquid Rocket Engines (LRE) are also presented. The ¦rst one is the supercritical §uid §ow inside small cooling channels. In a context of LRE, a strong heat §ux coming from the combustion chamber (locally φ ≈ 80 MW/m 2 ) may lead to very steep density gradients close to the wall. These gradients have to be thermodynamically and numerically captured to properly reproduce in the simulation the mechanism of heat transfer from the wall to the §uid. This is done with a shock-capturing weighted essentially nonoscillatory (WENO) numerical discretization scheme. The second issue is a supercritical §uid injection following experimental conditions [1] in which a trans-or supercritical nitrogen is injected into warm nitrogen. The two-dimensional results show vortex structures with high §uid density detaching from the main jet and persisting in the low-speed region with low §uid density.

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Section: Progress In Propulsion Physicsmentioning

confidence: 99%

Simulation of supercritical flows in rocket-motor engines: application to cooling channel and injection system

Ribert

Taïeb

Petit

et al. 2013

Progress in Propulsion Physics

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“…As an example, Fig. 2 shows that the PR-EoS as well as the SRK-EoS can only predict a limited number of alkanes from the homologue series within an acceptable error [22,23]. Generally, the density/compressibility factor prediction of the SRK-EoS is better for simple fluids like methane CH 4 and hydrogen H 2 , while the PR-EoS gives superior results for longer alkanes like n-hexane C 6 H 14 .…”

Section: Real-gas Modelingmentioning

confidence: 99%

Real-Gas Effects and Phase Separation in Underexpanded Jets at Engine-Relevant Conditions

Traxinger

Banholzer

Pfitzner

2018

2018 AIAA Aerospace Sciences Meeting

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A numerical framework implemented in the open-source tool OpenFOAM is presented in this work combining a hybrid, pressure-based solver with a vapor-liquid equilibrium model based on the cubic equation of state. This framework is used in the present work to investigate underexpanded jets at engine-relevant conditions where real-gas effects and mixture induced phase separation are probable to occur. A thorough validation and discussion of the applied vapor-liquid equilibrium model is conducted by means of general thermodynamic relations and measurement data available in the literature. Enginerelevant simulation cases for two different fuels were defined. Analyses of the flow field show that the used fuel has a first order effect on the occurrence of phase separation. In the case of phase separation two different effects could be revealed causing the single-phase instability, namely the strong expansion and the mixing of the fuel with the chamber gas. A comparison of single-phase and two-phase jets disclosed that the phase separation leads to a completely different penetration depth in contrast to single-phase injection and therefore commonly used analytical approaches fail to predict the penetration depth.

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“…Therefore, Redlich-Kwong-Peng-Robinson (RK-PR) [15][16][17] is adopted to predict the properties of kerosene and oxygen. A Chung's method [18] is also implemented for the calculation of transport properties.…”

Section: Fluid Thermodynamics and Transportmentioning

confidence: 99%

Effect of Dynamic SGS Model in a Kerosene-LOx Swirl Injector under Supercritical Condition

Heo¹,

Hong²,

Sung³

2015

International Journal of Aeronautical and Space Sciences

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In this study, numerical simulations are carried out to investigate the dynamic SGS model effects in a Kerosene-LOx coaxial swirl injector under high pressure conditions. The turbulent model is based on large-eddy simulation (LES) with real-fluid transport and thermodynamics. To assess the effect of the dynamic subgrid-scale (SGS) model, the dynamic SGS model is compared with that of the algebraic SGS model. In a swirl injector under supercritical pressure, the characteristics of temporal pressure fluctuation and power spectral density (PSD) present comparable discrepancies dependant on the SGS models, which affect the mixing characteristics. Mixing efficiency and the probability density (PDF) function are conducted for a statistical description of the turbulent flow fields according to the SGS models. The back-scattering of turbulent kinetic energy is estimated in terms of the film thickness of the swirl injector.

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Thermodynamic modeling based on a generalized cubic equation of state for kerosene/LOx rocket combustion

Cited by 134 publications

References 21 publications

Simulation of supercritical flows in rocket-motor engines: application to cooling channel and injection system

Simulation of supercritical flows in rocket-motor engines: application to cooling channel and injection system

Real-Gas Effects and Phase Separation in Underexpanded Jets at Engine-Relevant Conditions

Effect of Dynamic SGS Model in a Kerosene-LOx Swirl Injector under Supercritical Condition

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