| タイトル | Liquid Methane Testing With a Large-Scale Spray Bar Thermodynamic Vent System |
| 本文（外部サイト） | http://hdl.handle.net/2060/20140011201 |
| 著者（英） | Bolshinskiy, L. G.; Hedayat, A.; Schnell. A. R.; Hastings, L. J.; Sisco, J. D.; Flachbart, R. H. |
| 発行日 | 2014-07-01 |
| 言語 | eng |
| 内容記述 | NASA's Marshall Space Flight Center conducted liquid methane testing in November 2006 using the multipurpose hydrogen test bed outfitted with a spray bar thermodynamic vent system (TVS). The basic objective was to identify any unusual or unique thermodynamic characteristics associated with densified methane that should be considered in the design of space-based TVSs. Thirteen days of testing were performed with total tank heat loads ranging from 720 to 420 W at a fill level of approximately 90%. It was noted that as the fluid passed through the Joule-Thompson expansion, thermodynamic conditions consistent with the pervasive presence of metastability were indicated. This Technical Publication describes conditions that correspond with metastability and its detrimental effects on TVS performance. The observed conditions were primarily functions of methane densification and helium pressurization; therefore, assurance must be provided that metastable conditions have been circumvented in future applications of thermodynamic venting to in-space methane storage. |
| NASA分類 | Spacecraft Propulsion and Power |
| レポートNO | NASA/TP-2014-218197
M-1386 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
