Cyrene: An Experimental Two Phase Ammonia Fluid Loop in Micro Gravity. Results of a Parabolic Flight Campaign

1998 ◽  
Author(s):  
O. Lebaigue ◽  
N. Bouzou ◽  
C. Colin
Keyword(s):  
Parabolic Flight ◽  
Two Phase ◽  
Micro Gravity

Investigation of Gravity Effects on Electrically Driven Liquid Film Flow Boiling: A Micro-Gravity Flight Campaign in Preparation of ISS Experiment

2020 ◽  
Author(s):  
Alexander J. Castaneda ◽  
Nathaniel J. O’Connor ◽  
Jamal Yagoobi
Keyword(s):  
Liquid Film ◽  
Heat Transport ◽  
Film Flow ◽  
Flow Boiling ◽  
Parabolic Flight ◽  
Space Station ◽  
Two Phase ◽  
Ability To Act ◽  
Liquid Film Flow ◽  
Micro Gravity

Abstract The ongoing development of modern electronic systems leads to smaller, more powerful devices that are expected to operate in complex environments. Due to this, advanced thermal management technologies are required to meet the growing demand, especially in space where two-phase thermal systems are limited by the absence of gravity. Electrohydrodynamic (EHD) and dielectrophoretic (DEP) forces can be used to sustain stable liquid film boiling in micro-gravity, which is otherwise impractical due to the lack of a required buoyancy force to initiate bubble departure. EHD and DEP are phenomena that are represented by the interaction between electric fields and fluid flow. The DEP force especially is characterized by the unique ability to act on liquid/vapor interfaces due to a high gradient of electrical permittivity, allowing for two phase operation. This study investigates the effect of EHD conduction pumping coupled with DEP vapor extraction on liquid film flow boiling during a microgravity parabolic flight, and it characterizes the future two-phase microgravity heat transport technology prior to testing on the International Space Station (ISS). The results of this study show that EHD and DEP raise critical heat flux, lower heater surface temperature, and successfully sustain boiling in micro-gravity all at the cost of low power consumption. Additionally, the heat transfer data captured in terrestrial, microgravity, and 1.8 g conditions compare well, indicating that this technology can provide thermal enhancement independent of gravity. This study paves the way for future implementation of EHD-driven two-phase heat transport devices into space and aeronautical electronics applications.

scholarly journals Assessment of Human Hemodynamics under Hyper- and Microgravity: Results of two Aachen University Parabolic Flight Experiments

10.14311/958 ◽  
2007 ◽  
Vol 47 (4-5) ◽  
Author(s):  
N. Blanik ◽  
M. Hülsbusch ◽  
M. Herzog ◽  
C. R. Blazek
Keyword(s):  
Parabolic Flight ◽  
Lower Extremities ◽  
Joint Project ◽  
Fluid Shifts ◽  
Optoelectronic Sensor ◽  
German Aerospace ◽  
Micro Gravity

Astronauts complain about fluid shifts from their lower extremities to their head caused by weightlessness during their flight into space. For a study of this phenomenon, RWTH Aachen University and Charité University Berlin participated in a joint project on two parabolic flight campaigns of the German Aerospace Centre (DLR) in September 2005 and June 2006. During these campaigns, the characteristics of the rapid fluid shifts during hyper- and micro gravity were measured by a combination of PPG and PPGI optoelectronic sensor concepts. 

Art in the Space Age: Exploring the Relationship between Outer Space and Earth Space

Leonardo ◽  
2004 ◽  
Vol 37 (4) ◽  
pp. 273-276
Author(s):  
Takuro Osaka
Keyword(s):  
International Space Station ◽  
Outer Space ◽  
Parabolic Flight ◽  
Space Station ◽  
International Space ◽  
Earth Space ◽  
Space Art ◽  
Effective Use ◽  
The Relationship ◽  
Micro Gravity

The author's interest in Space Art has taken several forms, including project proposals for the effective use of the International Space Station, research on the theme of the possibility of art in outer space, and conducting interviews with astronauts. He has also performed experiments in a micro-gravity environment generated by parabolic flight. This article provides an account of his plans and the results of these experiments.

scholarly journals Temporal/spatial cognitive experiments under micro-gravity produced by parabolic flight

2019 ◽  
Vol 83 (0) ◽  
pp. 3C-046-3C-046
Author(s):  
Ikuma Adachi ◽  
Masahiro Terada ◽  
Satoshi Hirata ◽  
Mana Taguchi ◽  
Masaki Tomonaga ◽  
...  
Keyword(s):  
Parabolic Flight ◽  
Micro Gravity

scholarly journals Critical heat flux enhancement in microgravity conditions coupling microstructured surfaces and electrostatic field

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Alekos Ioannis Garivalis ◽  
Giacomo Manfredini ◽  
Giacomo Saccone ◽  
Paolo Di Marco ◽  
Artyom Kossolapov ◽  
...  
Keyword(s):  
Heat Flux ◽  
Electric Field ◽  
Critical Heat Flux ◽  
Electric Fields ◽  
Parabolic Flight ◽  
Dielectric Fluid ◽  
Two Phase ◽  
Microstructured Surfaces ◽  
Microgravity Conditions ◽  
Plain Surface

AbstractWe run pool boiling experiments with a dielectric fluid (FC-72) on Earth and on board an ESA parabolic flight aircraft able to cancel the effects of gravity, testing both highly wetting microstructured surfaces and plain surfaces and applying an external electric field that creates gravity-mimicking body forces. Our results reveal that microstructured surfaces, known to enhance the critical heat flux on Earth, are also useful in microgravity. An enhancement of the microgravity critical heat flux on a plain surface can also be obtained using the electric field. However, the best boiling performance is achieved when these techniques are used together. The effects created by microstructured surfaces and electric fields are synergistic. They enhance the critical heat flux in microgravity conditions up to 257 kW/m2, which is even higher than the value measured on Earth on a plain surface (i.e., 168 kW/m2). These results demonstrate the potential of this synergistic approach toward very compact and efficient two-phase heat transfer systems for microgravity applications.

Micro-gravity experiment of a space robotic arm using parabolic flight

2004 ◽  
Vol 18 (3) ◽  
pp. 247-267 ◽  
Author(s):  
Hirokata Sawada ◽  
Kyoichi Ui ◽  
Makoto Mori ◽  
Hiroshi Yamamoto ◽  
Ryoichi Hayashi ◽  
...  
Keyword(s):  
Parabolic Flight ◽  
Robotic Arm ◽  
Micro Gravity

Cryogenic Two-Phase Flow and Heat Transfer Under Terrestrial and Microgravity

2005 ◽  
Author(s):  
Kun Yuan ◽  
J. N. Chung ◽  
Yan Ji
Keyword(s):  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Normal Gravity ◽  
Two Phase Flow ◽  
Microgravity Condition ◽  
Phase Flow ◽  
Gravity Effect ◽  
Two Phase ◽  
Micro Gravity

This paper presents experimental investigations of cryogenic nitrogen two-phase flow in horizontal transparent tubes (diameters of 11.1mm) under terrestrial and micro-gravity (10−4g) conditions during the chilldown process, and the focus is on the film boiling region. Constant mass flow rate is achieved by a motor driven bellows, and three different mass fluxes from 9.2 to 27.6kg/m2 · s are tested in the experiments. A drop tower is applied to simulate the micro-gravity environment. During the chilldown process, we measure the time-dependent temperatures at three circumferential locations at different downstream locations. Video images are recorded for identifying the flow patterns. The experiments show that under normal gravity, the flow pattern change from dispersed flow to inverted annular flow and then to unsteady stratified flow according to different wall temperatures, the temperature differences between the lower and upper part of the test section increase with increasing flow rate. Under microgravity, when the temperature is high, the liquid chunks trend to be lifted up and confined mainly in the central core of the tube; when the temperature is low, the liquid chunks are more evenly dispersed inside the whole tube, and some touch the upper wall. It is also found that the measured wall temperatures drop more quickly under microgravity condition compared with that under normal gravity. Moreover, under microgravity condition, the measured temperatures drop more quickly with lower wall temperature. The gravity effect on the quenching curves is alleviated with increasing mass flow rate. Thus gravity effect is more important in low mass flow rate two-phase flow.

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