Numerical study of liquefied natural gas as a coolant in liquid rocket engines

Urbano, Annafederica; Nasuti, Francesco

doi:10.1177/0954410012451376

Cited by 6 publications

(3 citation statements)

References 27 publications

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“…The reducing parameters ρ r x and T r x are combinations of the critical parameters of the single species and reduce to the critical parameters for a pure fluid. Further details and the values of model coefficients can be found in [8,21]. The fundamental equation of state describing the Helmholtz free energy as a function of temperature and density, with its derivatives, is sufficient to provide a complete description of the thermodynamic properties of the mixture.…”

Section: A Equation Of Statementioning

confidence: 99%

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Parametric Analysis of Cooling Properties of Candidate Expander-Cycle Fuels

Urbano

Nasuti

2014

Journal of Propulsion and Power

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Flow evolution and heat transfer capability in the cooling system of liquid rocket engines heavily depend on propellant thermophysical properties. Coolant thermophysical property analysis and modeling is therefore important to study the possibility of relying on a regenerative cooling system, whose performance is crucial to determine feasibility and convenience of pump-fed liquid rocket cycles of the expander type. The aim of the present study is to compare the behavior of different liquid fuels for expander-cycle engines. They are light hydrocarbons, binary mixtures of them, and liquefied natural gas, which is a mixture made basically of methane and minor fractions of other light hydrocarbons and nitrogen. A parametric analysis is carried out by a validated numerical solver to compare temperature increase, pressure loss, and heat transfer evolution for the different fuels along the same straight tube and subjected to assigned heat fluxes. Results show that similar engine performance can be obtained by the different candidate expander-cycle fuels, but significant differences can be seen in the flow evolution through the cooling channels

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Section: A Equation Of Statementioning

confidence: 99%

“…An excess property approach is also used to get mixture transport properties [21]. The ideal gas contribution is evaluated, combining single species properties with the mixture rules for perfect gas [14,23,24].…”

Section: B Transport Propertiesmentioning

confidence: 99%

Parametric Analysis of Cooling Properties of Candidate Expander-Cycle Fuels

Urbano

Nasuti

2014

Journal of Propulsion and Power

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“…Thermal protection is a significant challenge for advanced engines used to power aircrafts, missiles, and rockets, especially the hydrocarbon-fueled scramjet engine, which has been widely studied in recent years. 1–6 Regenerative cooling with endothermic hydrocarbon fuel used as coolant is considered to be the best way to cool the scramjet engine with extremely high heat load. 7 However, using regenerative cooling only cannot meet the increasing cooling requirement of hydrocarbon-fueled scramjet engine when the flight Mach number keeps increasing.…”

Section: Introductionmentioning

confidence: 99%

Interaction mechanism between shock waves and supersonic film cooling with cracking reaction

Zuo

Zhang

Qin

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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In order to understand the interaction mechanism between shock waves and supersonic film cooling with cracking reaction, supersonic film cooling using gaseous hydrocarbon fuel as coolant in terms of cracking reaction of the coolant, with and without shock waves interaction, is investigated numerically. Theoretically, cracking reaction may be accelerated by the shock wave interaction, which may enhance the mixing of the coolant and absorb heat, which will lead to contradictory effects on supersonic film cooling. However, it turns out that, with shock waves interaction, cracking reaction only absorbs more heat but barely has any effect on the mixing either locally or further downstream due to the momentum change caused by the reaction is extremely small and the energy change plays the dominate role. It is worth mentioning that oblique shock wave causes energy accumulation in the shock wave interaction region, which deteriorates supersonic film cooling. However, with the cracking reaction considered, the negative effect brings by the oblique shock wave is weakened by the cracking reaction due to the increment of chemical heat absorption caused by the energy change. It is found that the absolute temperature in the shock wave interaction and the relative temperature increment caused by the shock wave interaction to be the decisive factors of the chemical heat absorption increment, especially for high absolute temperature or relative temperature increments, and the effect of the local reactant concentration plays the dominant role. Furthermore, the extent of weakened chemical reaction on the negative effect due to the oblique shock wave depends not only on the chemical heat absorption but also on the local absolute temperature.

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