Bubble Point Measurements With Liquid Methane of a Screen Capillary Liquid Acquisition Device

Jurns, John M.; McQuillen, John

doi:10.1063/1.2908512

Cited by 10 publications

(10 citation statements)

References 2 publications

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“…Previous tests had indicated inconclusive results regarding the suitability of this term [7]. However, the range of fluid conditions for the tests described herein was much broader than previous experiments.…”

Section: Liquid Viscosity Effectmentioning

confidence: 71%

“…Jurns et al [6] had previously proposed using a normalized kinematic viscosity correction term for calculating bubble point pressure as follows:…”

Section: Liquid Viscosity Effectmentioning

confidence: 99%

“…The use of cryogenic fluids in on-orbit propulsion systems offers the advantages of higher performance. [4,5], and LCH 4 [6,7] at saturated liquid conditions. The effects of subcooling on LAD performance were addressed at low pressure [5] Additional testing in LOX described herein continues to advance understanding of LADs.…”

Section: Introductionmentioning

confidence: 99%

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Liquid oxygen liquid acquisition device bubble point tests with high pressure lox at elevated temperatures

Jurns¹,

Hartwig²

2012

Cryogenics

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When transferring propellant in space, it is most efficient to transfer single phase liquid from a propellant tank to an engine. In earth's gravity field or under acceleration, propellant transfer is fairly simple. However, in low gravity, withdrawing single-phase fluid becomes a challenge. A variety of propellant management devices (PMD) are used to ensure single-phase flow. One type of PMD, a liquid acquisition device (LAD) takes advantage of capillary flow and surface tension to acquire liquid. The present work reports on testing with liquid oxygen (LOX) at elevated pressures (and thus temperatures) (maximum pressure 1724 kPa and maximum temperature 122K) as part of NASA's continuing cryogenic LAD development program. These tests evaluate LAD performance for LOX stored in higher pressure vessels that may be used in propellant systems using pressure fed engines. Test data shows a significant drop in LAD bubble point values at higher liquid temperatures, consistent with lower liquid surface tension at those temperatures. Test data also indicates that there are no first order effects of helium solubility in LOX on LAD bubble point prediction. Test results here extend the range of data for LOX fluid conditions, and provide insight into factors affecting predicting LAD bubble point pressures.

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Section: Liquid Viscosity Effectmentioning

confidence: 71%

“…Jurns et al [6] had previously proposed using a normalized kinematic viscosity correction term for calculating bubble point pressure as follows:…”

Section: Liquid Viscosity Effectmentioning

confidence: 99%

See 1 more Smart Citation

Liquid oxygen liquid acquisition device bubble point tests with high pressure lox at elevated temperatures

Jurns¹,

Hartwig²

2012

Cryogenics

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show abstract

“…Several facility modifications to the experimental hardware from Jurns et al (2007) were required before flowing LH 2 at Cell 7, and to ensure higher accuracy results over previous bubble point tests. All pressure control and regulation valves were changed to allow complete remote operation of Cell 7.…”

Section: Methodsmentioning

confidence: 99%

“…As was mentioned earlier, screen channel LADs have proven flight heritage with storable propellants, but, only ground testing has been conducted for cryogenic LOX and LH 2 using these fine mesh screens. Previously reported bubble points for the most popular 325×2300 mesh screen are plotted in Figure 3, which includes data for LH 2 , liquid nitrogen (LN 2 ), LOX, liquid methane (LCH 4 ) and IPA from Paynter (1973), , Cady (1973Cady ( , 1975Cady ( , 1977, Chato and Kudlac (2002), Kudlac and Jurns (2006), and Jurns et al (2007), respectively. The black line is the predicted values using Equation (2) and a pore diameter specified from Hartwig and Mann (2013a).…”

Section: Performance Gainsmentioning

confidence: 99%