Heat Loss Analysis of Flow Boiling Experiments Onboard International Space Station with Unclear Thermal Environmental Conditions (2nd Report: Liquid-vapor Two-phase Flow Conditions at Test Section Inlet)

Inoue, Koichi; Ohta, Hiroyuki; Asano, Hitoshi; Kawanami, Osamu; Imai, Ryoji; Suzuki, Koichi; Shinmoto, Yasuhisa; Kurimoto, Takashi; Matsumoto, Satoshi

doi:10.1007/s12217-021-09902-7

Cited by 17 publications

(2 citation statements)

References 32 publications

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“…While gravity significantly influences flow regime and behavior, it insignificantly affects average condensation heat transfer properties in the microchannel. Inoue [26] utilized a serpentine-type preheater to adjust vapor quality due to dimensional restrictions, the model incorporates heat transfer data from preliminary experiments with single-phase and two-phase flows, addressing significant heat loss from avionics airflow. Liu [27] explored two-phase flow and heat transfer in a loop thermosyphon across various filling ratios.…”

Section: Introductionmentioning

confidence: 99%

Study on the instability of FC-72 vapor-liquid interface in a rectangular channel under different gravity conditions

Zhang,

Xu,

Chen

et al. 2024

Preprint

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This paper investigates the instability of FC-72 vapor-liquid interface in a rectangular channel under different gravity conditions employing short-term microgravity experimental systems designed based on the drop tower platform. Visual observations and numerical simulations were conducted to monitor the behavior of vapor-liquid interface. The study reveals significant fluctuations, with liquid climbing along both sides of the channel after drop cabin releases. Higher initial liquid levels result in increased maximum liquid phase heights and decreased minimum values, with noticeable fluctuations. In microgravity, the maximum height gradually rises with significant fluctuations, while minimum height remains relatively stable. Increasing contact angle leads to reduced variation in maximum and minimum heights, with a distinctive upward slope of vapor-liquid interface observed at a 90° contact angle. The temporal evolution of the vapor-liquid interface observed in simulations closely aligns with experimental findings. This study highlights the importance of considering various factors in designing experiments involving fluid systems with low surface tension, particularly in aerospace applications, and calls for further research to develop more sophisticated models and techniques for understanding and controlling vapor-liquid interface instability.

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Section: Introductionmentioning

confidence: 99%

Study on the instability of FC-72 vapor-liquid interface in a rectangular channel under different gravity conditions

Zhang,

Xu,

Chen

et al. 2024

Preprint

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“…Two series of flow boiling experiments with n-Perfluorohexane in a 4mm diameter tube were conducted in a metallic copper tube and in a transparent glass tube coating by a gold deposite. The data are under evaluation with a special care to the estimation of the heat losses for a precise evaluation of heat transfer [24].…”

Section: Introductionmentioning

confidence: 99%

Conception of a compact flow boiling loop for the International Space Station- First results in parabolic flights

Chorin¹,

Boned²,

Sebilleau³

et al. 2023

Comptes Rendus. Mécanique

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The design of a pipe flow boiling experiment for the International Space Station is proposed, taking into account typical weight, power consumption and size constraints. The effect of singularities such as elbows upstream the test section is investigated. Velocity profiles downstream two elbows, measured by Particle Image Velocimetry are in good agreement with numerical simulation and allow to determine a specific distance (decay length) downstream the elbows for which the velocity profile recover its axisymmetry. From these results a breadboard is designed and tested in parabolic flights. Care has been taken to generate boiling downstream the decay length. Two-phase bubbly flow is observed with 2 perpendicular high-speed cameras in the test section and a symmetry of the bubble distribution in the pipe is verified for different gravity conditions when the bubbles are created after the decay length.

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Investigation on Thermal Behavior During Pressurization Discharge of Liquid Oxygen Under Different Acceleration Levels

Liu

Yin

Liu

et al. 2022

Microgravity Sci. Technol.

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Cryogenic pressurization discharge involves on complex heat exchange and fluid flow issues, and the related thermal physical performance should be comprehensively investigated. In this study, a two-dimensional axisymmetric numerical model is adopted to research the outflow characteristic from a cylindrical liquid oxygen storage tank with the gas injection. The VOF method is utilized to predict the pressurization discharge with 360 K high-temperature gaseous oxygen as the pressurant gas. Validated against the liquid hydrogen discharge experiments, the numerical model is turned out to be proper and acceptable with the calculation errors limited within 20%. On the basis of the numerical model, effect of the flight acceleration level on the tank pressurization and liquid outflow performance are numerically simulated and analyzed, with the gas injection rate of 0.18 kg/s and the liquid outflow rate of 36.0 kg/s. Some valuable conclusions are obtained finally. The present study is significant to the safety flight of launch vehicle and may supply some technical supports for the design of cryogenic propellant system.

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Heat Loss Analysis of Flow Boiling Experiments Onboard International Space Station with Unclear Thermal Environmental Conditions (2nd Report: Liquid-vapor Two-phase Flow Conditions at Test Section Inlet)

Cited by 17 publications

References 32 publications

Study on the instability of FC-72 vapor-liquid interface in a rectangular channel under different gravity conditions

Study on the instability of FC-72 vapor-liquid interface in a rectangular channel under different gravity conditions

Conception of a compact flow boiling loop for the International Space Station- First results in parabolic flights

Investigation on Thermal Behavior During Pressurization Discharge of Liquid Oxygen Under Different Acceleration Levels

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