Quenching experiments inside 6.0mm tube at reduced gravity

Celata, Gian Piero; Cumo, M.; Gervasi, M.; Zummo, Giovanni

doi:10.1016/j.ijheatmasstransfer.2008.08.043

Cited by 26 publications

(12 citation statements)

References 7 publications

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“…Xu (1998) and AdhamKhodaparast et al (1995) observed a decrease in the rewetting temperature in 0 g during the quenching of an horizontal plate by a parallel flow. Westbye et al (1995) had the same conclusion with an horizontal stainless steel tube, and Celata et al (2007) observed a small decrease in 0 g too, for a vertical pyrex tube.…”

Section: Rewetting Temperaturesupporting

confidence: 54%

See 1 more Smart Citation

Effect of Gravity on Film Boiling Heat Transfer and Rewetting Temperature during Quenching

Verthier

Celata

Zummo

et al. 2009

Microgravity Sci. Technol.

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This paper describes the experimental strategy developed to improve the modeling of liquidvapor flows during the chill down of rocket engines by cryogenic fluid in microgravity. A similarity analysis is performed to determine the relevant dimensionless numbers for the design of an experiment similar to engine flows. A literature review on reduced gravity quenching experiments, and on rewetting temperature and film boiling heat transfer shows the lack of validated models for microgravity. Experimental results obtained with the quenching of a glass tube by FC72 during parabolic flight are presented. Especially the impact of gravity and subcooling on rewetting temperature and film boiling heat transfer is investigated. Results show an increase in rewetting temperature, and a decrease in film boiling heat transfer under reduced gravity in agreement with the literature. The compar-B. Verthier (B) · C. Colin ison of 0 g flow pattern with corresponding tests on ground points out a behavior at 0 g closest to 1 g upflow than 1 g downflow.

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Section: Rewetting Temperaturesupporting

confidence: 54%

“…This one consists in a two phase flow loop, close to the MICROBO installation described in Celata et al (2007). The test section will be a 1cm diameter 10cm long stainless steel tube, chilled by a subcooled or saturated NOV EC HF E7000(3M) flow.…”

Section: Criterion For the Similarity Between Two Quenching Flowsmentioning

confidence: 99%

Effect of Gravity on Film Boiling Heat Transfer and Rewetting Temperature during Quenching

Verthier

Celata

Zummo

et al. 2009

Microgravity Sci. Technol.

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“…In 1-g conditions, the flow patterns are very tortuous and the liquid and vapor are broken into small droplets and bubbles, whereas microgravity flow boiling experiences large continuous patches of the two phases with smooth interfaces. 10,20 The existing two-phase flow boiling data in reduced gravity consist primarily of nucleate boiling heat transfer and critical heat flux measurements. 10,11 Only a few quenching studies in reduced gravity conditions exist that cover the entire chilldown process, including film boiling heat transfer and the rewetting temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Celata et al 20,23 reported experimental results for 1-g (upward flow) and reduced gravity (10 − 2 g) chilldown using FC-72 during flying parabolic trajectories. The results showed a significant decrease in the quenching front velocity in reduced gravity, whereas the rewetting temperature was not affected by the gravity levels.…”

Section: Introductionmentioning

confidence: 99%

The effect of reduced gravity on cryogenic nitrogen boiling and pipe chilldown

et al. 2016

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Manned deep space exploration will require cryogenic in-space propulsion. Yet, accurate prediction of cryogenic pipe flow boiling heat transfer is lacking, due to the absence of a cohesive reduced gravity data set covering the expected flow and thermodynamic parameter ranges needed to validate cryogenic two-phase heat transfer models. This work provides a wide range of cryogenic chilldown data aboard an aircraft flying parabolic trajectories to simulate reduced gravity. Liquid nitrogen is used to quench a 1.27 cm diameter tube from room temperature. The pressure, temperature, flow rate, and inlet conditions are reported from 10 tests covering liquid Reynolds number from 2,000 to 80,000 and pressures from 80 to 810 kPa. Corresponding terrestrial gravity tests were performed in upward, downward, and horizontal flow configurations to identify gravity and flow direction effects on chilldown. Film boiling heat transfer was lessened by up to 25% in reduced gravity, resulting in longer time and more liquid to quench the pipe to liquid temperatures. Heat transfer was enhanced by increasing the flow rate, and differences between reduced and terrestrial gravity diminished at high flow rates. The new data set will enable the development of accurate and robust heat transfer models of cryogenic pipe chilldown in reduced gravity.

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“…A literature review on boiling (pool and convective) evidences the new field of investigation open to analyse and understand the nucleation in microgravity (see Table 1). Celata et al (2009) 2009 FC-72 Parabolic flights (ESA) 'Quenching' in glass capillary tubes Zhao et al (2009) 2009 R113 Scientific satellite Pool boiling on Platinum wire Kawanami et al (2007) 2007 LN 2 Parabolic flights (NASA) Transparent resistive deposit on a cylinder Sodtke et al (2006) 2006 FC-72 Parabolic flights (ESA) Utilization of liquid crystals Zhang et al (2005) 2005 FC-72 Parabolic flights (NASA) Flow in a channel heating by resistive deposit Henry and Kim (2004) 2004 FC-72 Parabolic flights (NASA) Network of Platinum resistances Di Marco et al (2003) 2003 FC-72 Drop tower (JAXA) Utilization of an electrical field Straub (2000) 2000 R11 NASA SpaceLab IML-2 Circular heater of 160 μm in diameter…”

Section: Introductionmentioning

confidence: 99%

Convective Boiling Between 2D Plates: Microgravity Influence on Bubble Growth and Detachment

Serret

Brutin

Rahli

et al. 2010

Microgravity Sci. Technol.

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The experiment detailed in this paper presents results obtained on the nucleation, growth and detachment of HFE-7100 confined vapour bubbles. Bubbles are created on an artificial nucleation site between two-dimensional plates under terrestrial and microgravity conditions. The experiments are performed by varying the shear flow by changing the convective mass flow rate, and varying the bubble nucleation rate by changing the heat flux supplied. The experiments are performed under normal (1 g) and reduced gravity (μg). The distance between the plates is equal to 1 mm. The results of these experiments are related to the detachment diameters of bubbles on the single artificial nucleation site and to the associated effects on the heat transfer by the confinement influence. The experimental device allows the observation of the flow using both visible video camera and infrared video camera. Here, we present the results obtained concerning the influence of gravity on the bubble detachment diameter and the images of 2D bubbles obtained in microgravity by means of an infrared camera. The following parameters: nucleation site surface temperature, bubble detachment diameter and bubble nucleation frequency evidence modifications due to microgravity.

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Quenching experiments inside 6.0mm tube at reduced gravity

Cited by 26 publications

References 7 publications

Effect of Gravity on Film Boiling Heat Transfer and Rewetting Temperature during Quenching

Effect of Gravity on Film Boiling Heat Transfer and Rewetting Temperature during Quenching

The effect of reduced gravity on cryogenic nitrogen boiling and pipe chilldown

Convective Boiling Between 2D Plates: Microgravity Influence on Bubble Growth and Detachment

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