Development Program for a Liquid Methane Heat Pipe

Foster, W. G.; Murray, D. O.

doi:10.1007/978-1-4684-3111-7_11

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Predicting the capillary-driven motion of a liquid is essential in developing propellant management devices [1][2][3][4] and heat transfer systems for space applications [5][6][7]. Moreover, capillary forces play a major role in the dynamics of cryogenic propellants in partially filled tanks [8][9][10] in microgravity.…”

Section: Introductionmentioning

confidence: 99%

Dynamic wetting experiments with nitrogen in a quasi-capillary tube

Fiorini,

Simonini,

Steelant

et al. 2023

Phys. Rev. Fluids

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This work investigates the wetting dynamics of cryogenic fluids in inertia-dominated conditions. We experimentally characterized an oscillating gas-liquid interface of liquid nitrogen in a partially filled U-shaped quartz tube. The experiments were carried out in controlled cryogenic conditions, with interface oscillations produced by releasing the liquid column from an unbalanced position and having nitrogen vapor as the only ullage gas. During the experiments, the interface shape was tracked via image processing and used to fit a model from which the contact angle could be accurately determined. The results show that the dynamic contact angle evolution in advancing conditions is linearly linked to the Capillary number, with a slope depending on whether the interface moves over a dry or a pre-wet surface. However, the contact angle remains close to the one at equilibrium in receding conditions. To analyze the relation between contact angle and interface dynamics, we define an equivalent contact angle as the one that would make a spherical interface produce the same capillary pressure drop as the actual interface shape. The evolution of this equivalent contact angle proved to be independent of the evolution of the actual one, suggesting that the interface shape is not influenced by it. Finally, a theoretical analysis of the interface motion using a simplified model shows that viscous forces dominate the damping of the interface for small tube sizes, while gravity and inertial forces dominate the oscillating dynamics of the liquid column for larger tubes.

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Section: Introductionmentioning

confidence: 99%

Dynamic wetting experiments with nitrogen in a quasi-capillary tube

Fiorini,

Simonini,

Steelant

et al. 2023

Phys. Rev. Fluids

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“…The thermal system in this paper is a new type of approach to provide cooling where condenser portion of cryogenic heat pipe is connected externally to sink. Many investigators [3][4][5][6] have carried out experiments on the cryogenic heat pipes. In all these investigations either the condenser is immersed in the liquid nitrogen or the condenser is connected to cryocooler whose operating temperature can be maintained at constant level by varying the cooling capacity.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations on an axial grooved cryogenic heat pipe

Muniappan

Senthil

2012

THERM SCI

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This paper deals with development and studies of a trapezoidal axial grooved nitrogen heat pipe. A special liquid nitrogen cryostat has been designed and developed for evaluating the performance of heat pipe where the condenser portion is connected to the cold sink externally. Experiments have been performed on the heat pipe as well as on an equivalent diameter copper rod at different heat loads. The steady state performance of the heat pipe is compared with that of copper rod

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Heat Exchangers in Cryocoolers

Walker

1983

Cryocoolers

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Development Program for a Liquid Methane Heat Pipe

Cited by 3 publications

References 2 publications

Dynamic wetting experiments with nitrogen in a quasi-capillary tube

Dynamic wetting experiments with nitrogen in a quasi-capillary tube

Experimental investigations on an axial grooved cryogenic heat pipe

Heat Exchangers in Cryocoolers

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