Publication Date:
2019-07-13
Description:
Experimental results are reported for submerged injection pressurization and expulsion tests of a 4.89 cu m liquid hydrogen tank. The pressurant injector was positioned near the bottom of the test vessel to simulate liquid engulfment of the pressurant gas inlet; a condition that may occur in low-gravity conditions. Results indicate a substantial reduction in pressurization efficiency, with pressurant gas requirements approximately five times greater than ideal amounts. Consequently, submerged vapor injection should be avoided as a low-gravity autogenous pressurization method whenever possible. The work presented herein validates that pressurent requirements are accurately predicted by a homogeneous thermodynamic model when the submerged injection technique is employed.
Keywords:
PROPELLANTS AND FUELS
Type:
NASA-TM-104516
,
E-6386
,
NAS 1.15:104516
,
Cryogenic Engineering and International Cryogenic Materials Conference; Jun 11, 1991 - Jun 14, 1991; Huntsville, AL; United States
Format:
application/pdf
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