CFD investigation of thermal and pressurization performance in LH2 tank during discharge

Wang, Lei; Li, Yanzhong; Li, Cui; Zhao, Zhiyuan

doi:10.1016/j.cryogenics.2013.05.005

Cited by 55 publications

(17 citation statements)

References 20 publications

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“…The phase change is assumed to occur at a constant pressure and at a quasi thermo-equilibrium state, and mainly dependent on saturate temperature. The phase change model [16,21] is given as follows.…”

Section: Governing Equationsmentioning

confidence: 99%

“…where r l and r v are mass transfer time parameters [16,21]. A single momentum equation is solved throughout the domain, and the resulting velocity field is shared among the phase.…”

Section: Governing Equationsmentioning

confidence: 99%

“…The pressurized discharge process of the first stage propellant tank during the rocket ascent period is also investigated by Wang [21,22], under the effect of aerodynamic heating. Other investigators also have conducted some research on the discharge process of the first stage.…”

Section: Introductionmentioning

confidence: 99%

“…As the Refs. [21,22] mainly focus on the tank discharge for the first stage tank, little attention has been paid on the final stage, which would supply the power for the rocket from the atmosphere to the designed orbit. Under the effect of aerodynamic heat and space radiation, the final stage tank would experience active-pressurization and pressurized discharge process successively.…”

Section: Introductionmentioning

confidence: 99%

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Pressurization performance and temperature stratification in cryogenic final stage propellant tank

Liu

Yonghua

2016

Applied Thermal Engineering

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Section: Governing Equationsmentioning

confidence: 99%

“…where r l and r v are mass transfer time parameters [16,21]. A single momentum equation is solved throughout the domain, and the resulting velocity field is shared among the phase.…”

Section: Governing Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pressurization performance and temperature stratification in cryogenic final stage propellant tank

Liu

Yonghua

2016

Applied Thermal Engineering

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“…All of the source terms are driven by the cell temperature, T, and implemented via customized UDF. Based on the following temperature regimes, the mass transfer can be described as follows [17]: If…”

Section: Numerical Methodologymentioning

confidence: 99%

Theoretical Research on R245fa Condensation Heat Transfer inside a Horizontal Tube

Liu¹,

Huo²,

Liu³

et al. 2015

ENG

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Numerical simulation on R245fa condensation inside an inner diameter of 8 mm horizontal tube is researched in this paper. The effect of variation in velocity, condensation temperature and superheat of inlet steam and variation in cooling water temperature on heat transfer coefficient are investigated as a parametric study. Condensation process of steam has been successfully modeled by applying a user defined function (UDF) added to the commercial computational fluid dynamics (CFD) package. By analyzing the corresponding condensate contours and the curves of local heat transfer coefficient, the relationships between condensation heat transfer coefficient and various parameters of R245fa inside horizontal tube are obtained. It shows that the heat transfer coefficient increases by the increase in velocity, condensation temperature and superheat of inlet steam and the decrease in cooling water temperature. The errors between the heat transfer coefficient of simulation result and model of Wang and Shah are within ±30%. The parametric study will provide the basis for designing efficient heat exchangers of R245fa.

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CFD modeling of LPG vessels under fire exposure conditions

et al. 2014

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Fire exposure of tanks used for the storage and transportation of liquefied gases under pressure may cause complex heat- and mass-transfer phenomena that may contribute to compromise the integrity of the vessels in accident scenarios. Heat transfer through vessel lading results in the heat-up of the internal fluid and the increase of vessel internal pressure. However, local temperature gradients in the liquid phase cause liquid stratification phenomena that result in a more rapid vaporization and pressure build-up in the liquid phase. These fundamental phenomena were analyzed by a computational fluid dynamic model. The model was specifically focused on the early steps of vessel heat-up, when liquid stratification plays a relevant role in determining the vessel internal pressure. A two-dimensional transient simulation was set up using ANSYS FLUENT in order to predict the evolution of the liquid and vapor phases during the tank heat up. The model was validated against large scale experimental data available for liquefied petroleum gas vessels exposed to hydrocarbon fires, and was applied to case studies derived from recent accidental events in order to assess the expected time of pressure build-up in different fire scenarios

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CFD investigation of thermal and pressurization performance in LH2 tank during discharge

Cited by 55 publications

References 20 publications

Pressurization performance and temperature stratification in cryogenic final stage propellant tank

Pressurization performance and temperature stratification in cryogenic final stage propellant tank

Theoretical Research on R245fa Condensation Heat Transfer inside a Horizontal Tube

CFD modeling of LPG vessels under fire exposure conditions

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