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The Effect of Vibrations on Cryogens Boil Off During Launch, Transfer and Transport

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Date Issued:
2016
Abstract/Description:
Boil-off of a cryogenic fluid which is caused by the temperature difference between the fluid and its environment is a phenomenon which has long been studied and is well understood. However, vibrational excitation of a cryogenic storage tank and the fluid inside it also play a role in the loss of cryogens. Mechanical energy applied to the system in the form of vibrational input is converted into thermal energy via viscous damping of the fluid. As a result, when a storage tank full of cryogenic fluids is vibrated, it boils off at an increased rate.A series of experiments were performed in which a cryogenic storage Dewar filled with liquid nitrogen was subjected to vibrational input and the rate of boil-off was measured. Based on the results of the testing, it has been determined that the rate of boil-off of a cryogenic fluid increases by a factor of up to five times the resting boil off rate during the application of vibrational energy. The development of advanced cryogenic storage systems capable of reducing vibrational loading of the fluid could significantly decrease the loss of cryogens during procedures such as transporting and storing the fluid or launching a space vehicle.
Title: The Effect of Vibrations on Cryogens Boil Off During Launch, Transfer and Transport.
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Name(s): Schlichenmaier, Erin, Author
Chow, Louis, Committee Chair
Kauffman, Jeffrey, Committee Member
Raghavan, Seetha, Committee Member
University of Central Florida, Degree Grantor
Type of Resource: text
Date Issued: 2016
Publisher: University of Central Florida
Language(s): English
Abstract/Description: Boil-off of a cryogenic fluid which is caused by the temperature difference between the fluid and its environment is a phenomenon which has long been studied and is well understood. However, vibrational excitation of a cryogenic storage tank and the fluid inside it also play a role in the loss of cryogens. Mechanical energy applied to the system in the form of vibrational input is converted into thermal energy via viscous damping of the fluid. As a result, when a storage tank full of cryogenic fluids is vibrated, it boils off at an increased rate.A series of experiments were performed in which a cryogenic storage Dewar filled with liquid nitrogen was subjected to vibrational input and the rate of boil-off was measured. Based on the results of the testing, it has been determined that the rate of boil-off of a cryogenic fluid increases by a factor of up to five times the resting boil off rate during the application of vibrational energy. The development of advanced cryogenic storage systems capable of reducing vibrational loading of the fluid could significantly decrease the loss of cryogens during procedures such as transporting and storing the fluid or launching a space vehicle.
Identifier: CFE0006389 (IID), ucf:51529 (fedora)
Note(s): 2016-08-01
M.S.M.E.
Engineering and Computer Science, Mechanical and Aerospace Engineering
Masters
This record was generated from author submitted information.
Subject(s): Cryogenic fluids -- cryogens -- vibrations
Persistent Link to This Record: http://purl.flvc.org/ucf/fd/CFE0006389
Restrictions on Access: public 2016-08-15
Host Institution: UCF

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