Test program to demonstrate the stability of hydrazine in propellanttanks

Moran, C. M.; Sutton, Derek

doi:10.2514/6.1983-1382

Cited by 1 publication

(3 citation statements)

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“…Given the differences in temperature and tank material between the Moran et al [4] determination and the current determination of the decomposition rate, the authors feel that the determined rate is not unreasonable given what is known about hydrazine decomposition. Hydrazine decomposition was not observed to interfere with the current experiments, and it would not be expected to interfere based on either the Moran et al [4] decomposition rate or the rate determined here. A validation of the apparatus was conducted with a well-known gas-liquid system (helium solubility in water) to make sure the apparatus was working properly [5][6][7].…”

Section: Methodsmentioning

confidence: 92%

“…Assuming the dominant pathway of this decomposition is nitrogen and ammonia formation, then this gas generation rate would yield a hydrazine decomposition rate of 0.033 0.007%∕yr −1 . The literature value for the 10 year study of hydrazine decomposition inside glass ampoules by Moran and Bjorklund [4] determined the rate of decomposition of hydrazine at 316 K to be 0.015% per year [4]. Given the differences in temperature and tank material between the Moran et al [4] determination and the current determination of the decomposition rate, the authors feel that the determined rate is not unreasonable given what is known about hydrazine decomposition.…”

Section: Methodsmentioning

confidence: 96%

“…The literature value for the 10 year study of hydrazine decomposition inside glass ampoules by Moran and Bjorklund [4] determined the rate of decomposition of hydrazine at 316 K to be 0.015% per year [4]. Given the differences in temperature and tank material between the Moran et al [4] determination and the current determination of the decomposition rate, the authors feel that the determined rate is not unreasonable given what is known about hydrazine decomposition. Hydrazine decomposition was not observed to interfere with the current experiments, and it would not be expected to interfere based on either the Moran et al [4] decomposition rate or the rate determined here.…”

Section: Methodsmentioning

confidence: 96%

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Solubility of Pressurant Gases in Liquid Hydrazine at Elevated

DeSain

Brady

Curtiss

et al. 2015

Journal of Propulsion and Power

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Many propellant delivery systems use helium gas for storage, pumping, and pressurizing liquid propellants for inspace applications. To properly understand propellant tank functionality, reliable data on the solubilities of pressurant gases in these propellants are needed. Thus, the solubility of helium in liquid hydrazine has been measured as a function of pressure and temperature. The current measurements were conducted at pressures relevant to inspace applications of 0 to 1000 psia for the first time. The temperature dependence was studied in the relevant temperature range of 278 to 308 K. The current results do not agree with the only previous measurement of helium solubility in hydrazine. These previous measurements were conducted in a much lower-pressure regime. The cause of the discrepancies between the current measurements and the previous measurements is unclear. The solubilities of nitrogen and argon at 293.15 K were also measured to better understand the discrepancies between current and previous experiments. Nomenclature

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