Space Station heat pipe advanced radiator element (SHARE) flight test results and analysis

Kosson, R.; Brown, Richard F.; Ungar, Eugene K.

doi:10.2514/6.1990-59

Cited by 12 publications

(3 citation statements)

References 2 publications

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“…Because of the latter, the liquid charge in a monogroove heat pipe was found to be extremely critical. Venting of NCG-supported bubbles through this narrow slot was also difficult as it was observed during the SHARE space flight experiment (Kosson et al, 1990). The monogroove design was later modified to avoid these problems: a screen wick was added to the evaporator section to provide liquid to the wall grooves during an arterial blockage; a larger slot with a channel splitter was introduced to help easily venting the NCG-supported vapor bubbles (Ambrose and Holmes, 1991); and an electrohydrodynamic pump was used to provide quick recovery from dryout (Bryan and Seyed-Yagoobi, 1997).…”

Section: Introductionmentioning

confidence: 94%

Investigation of the Thermal Performance Characteristics of a Variable Conductance Arterial Heat Pipe

Kaya¹,

Goncharov²

2011

Frontiers in Heat Pipes

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A single-artery variable conductance arterial heat pipe was experimentally and numerically studied. To investigate the growth of the noncondensible gas supported bubbles, one-dimensional time-dependent conservation equations were solved by using the finite element method. It was shown that the time of collapse for the diffusion-controlled bubbles was relatively short in the condenser. However, the bubbles grew very rapidly in the evaporator even at moderate superheat levels, which demonstrated that the heat pipe would experience arterial blockage and subsequent dryout without vapor venting pores. An optimum diameter and spacing for the venting pores were calculated to maximize the heat transfer limit and minimize the pressure drop. Test results demonstrated heat load limits up to 120 W and a narrow temperature control range.

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Section: Introductionmentioning

confidence: 94%

Investigation of the Thermal Performance Characteristics of a Variable Conductance Arterial Heat Pipe

Kaya¹,

Goncharov²

2011

Frontiers in Heat Pipes

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“…Other fluid system mishaps aboard spacecraft involve gas bubbles in fluid lines, phase separation, and various thermal-fluid phenomenon. The space station heat pipe advanced radiator element (SHARE) was an experiment that experienced massive bubble generation in heat pipe channels to the point of halting fluid flow [17].…”

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confidence: 99%

Non-Contact Distillation

Rasheed¹

2000

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Leidenfrost phenomenon has been studied extensively for its role in applications ranging from nuclear reactor cooling, to metals manufacturing, combustion, and other fields. Herein, Leidenfrost phenomenon is pursued towards non-contact distillation processes with hopes of reducing or even eliminating contaminant fouling. In particular, the microgravity environment of a drop tower is exploited to demonstrate the facility with which droplets achieve and sustain the Leidenfrost state. Dynamic Leidenfrost impacts in microgravity are presented for impacts on hydrophilic and superhydrophobic planar substrates, macro-pillar arrays, confined passageways, and others. Nearly ideal elastic non-contact impacts and droplet oscillation modes are observed. Dynamic Leidenfrost impacts in microgravity for uniquely low velocity impacts are investigated analytically and experimentally. We find Leidenfrost vapor layer thicknesses on the order of millimeters for a 1 mL droplet of water with impact velocity 1 mm/s -a 100-fold increase relative to terrestrial vapor layers. Such results are supported by preliminary experimental observations. Further droplet distillation experiments are conducted in a terrestrial gravity environment using a heated tilted rotating hemi-circular track. Droplet evaporation rates and lifetimes are tabulated for the sliding/rolling drops at varying angular velocities and tilt angles. An analytical model for the evaporation rate of a rolling Leidenfrost droplet is developed and compared to the experimental results with good agreement. The empirical and analytical results serve as key design tools for sizing a prototypical non-contact distillation system for terrestrial desalinization or spacecraft water recycling.ii

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“…This is undesirable as it would lead to a local spike in temperature which could potentially damage the equipment that is relying on the heat pipe for cooling. During testing vapour bubbles formed in the liquid artery which caused significant performance degradation [8]. This design was modified and in August 1991 on STS-43 the SHARE-II experiment was launched.…”

Section: Evapora Condenser Vapor Flow Wickmentioning

confidence: 99%

An experimental and numerical investigation of capillary limit in an arterial heat pipe

Siddiqui¹

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The author has granted a nonexclusive license allowing Library and Archives Canada to reproduce, publish, archive, preserve, conserve, communicate to the public by telecommunication or on the Internet, loan, distribute and sell theses worldwide, for commercial or noncommercial purposes, in microform, paper, electronic and/or any other formats. L'auteur a accorde une licence non exclusive permettant a la Bibliotheque et Archives Canada de reproduire, publier, archiver, sauvegarder, conserver, transmettre au public par telecommunication ou par I'Internet, preter, distribuer et vendre des theses partout dans le monde, a des fins commerciales ou autres, sur support microforme, papier, electronique et/ou autres formats. Bien que ces formulaires aient inclus dans la pagination, il n'y aura aucun contenu manquant.

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Space Station heat pipe advanced radiator element (SHARE) flight test results and analysis

Cited by 12 publications

References 2 publications

Investigation of the Thermal Performance Characteristics of a Variable Conductance Arterial Heat Pipe

Investigation of the Thermal Performance Characteristics of a Variable Conductance Arterial Heat Pipe

Non-Contact Distillation

An experimental and numerical investigation of capillary limit in an arterial heat pipe

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