Actions for Experimental Investigation of Jet-Induced Mixing of a Large Liquid Hydrogen Storage Tank

Email RIS file
Bookmark
Report an Issue

Experimental Investigation of Jet-Induced Mixing of a Large Liquid Hydrogen Storage Tank

Author
Lin, C. S.
Published
Jun 1, 1994.
Physical Description
1 electronic document
Additional Creators
Vandresar, N. T. and Hasan, M. M.
Online Version

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
Summary
Experiments have been conducted to investigate the effect of fluid mixing on the depressurization of a large liquid hydrogen storage tank. The test tank is approximately ellipsoidal, having a volume of 4.89 m(exp 3) and an average wall heat flux of 4.2 W/m(exp 2) due to external heat input. A mixer unit was installed near the bottom of the tank to generate an upward directed axial jet flow normal to the liquid-vapor interface. Mixing tests were initiated after achieving thermally stratified conditions in the tank either by the introduction of hydrogen gas into the tank or by self-pressurization due to ambient heat leak through the tank wall. The subcooled liquid jet directed towards the liquid-vapor interface by the mixer induced vapor condensation and caused a reduction in tank pressure. Tests were conducted at two jet submergence depths for jet Reynolds numbers from 80,000 to 495,000 and Richardson numbers from 0.014 to 0.52. Results show that the rate of tank pressure change is controlled by the competing effects of subcooled jet flow and the free convection boundary layer flow due to external tank wall heating. It is shown that existing correlations for mixing time and vapor condensation rate based on small scale tanks may not be applicable to large scale liquid hydrogen systems.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19940029101.
Accession ID: 94N33607.
AIAA PAPER 94-2079.
NASA-TM-106629.
E-8926.
NAS 1.15:106629.
Joint Thermophysics and Heat Transfer Conference; 20-23 Jun. 1994; Colorado Springs, CO; United States.
Terms of Use and Reproduction
Copyright, Distribution as joint owner in the copyright.
View MARC record | catkey: 15658490