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Pressure drop and He II flow through fine mesh screensFluid acquisition systems for He II transfer devices will utilize gallery arms to ensure that the fluid encounters the pump inlet. In near term experiments such as Superfluid Helium on Orbit Transfer (SHOOT), the preferred configuration consists of several rectangular channels which have one side made from a Dutch weave stainless steel screen having 325 x 2300 wires per inch. The effective pore diameter for this screen is about 5 microns. The present paper reports on measurements of pressure drop across a screen when it is subjected to a flow of liquid helium. The experiment measures the time rate of change of the level in two different helium reservoirs connected by a screen-blocked channel. Results with normal helium are compared with predictions based on the Armour-Cannon (1968) equations. The He II data show considerable deviation from the classical result. A discussion of the He II pressure drop results in terms of two fluid hydrodynamics is included.
Document ID
19910043907
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Maddocks, J. R.
(Wisconsin Univ. Madison, WI, United States)
Van Sciver, S. W.
(Wisconsin, University Madison, United States)
Date Acquired
August 14, 2013
Publication Date
May 1, 1989
Publication Information
Publication: Cryogenics
Volume: 29
ISSN: 0011-2275
Subject Category
Engineering (General)
Accession Number
91A28530
Funding Number(s)
CONTRACT_GRANT: NAG5-1031
Distribution Limits
Public
Copyright
Other

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