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LUND UNIVERSITY LIBRARIES

Exprimental Study of Spin-Up of a Fluid-Filled Cylindrical Tank

Svensson, Jakob LU (2018) MVKM01 20172
Department of Energy Sciences
Abstract
To ensure safety on upper stage rockets, the fluid dynamic phenomenon known as sloshing in the liquid propellant tanks needs to be understood. CFD is a relatively cheap tool, but studies by Schmitt [7] suggest that models currently used for simulations do not predict the flow behavior.To verify computational models, experiments are setup on a cylindrical tank. The time for thefluid to become steady in a cylindrical tank rotating along the axis is measured for both a com-pletely water filled tank and a tank half-filled with water and half-filled with air. The method for measuring the time until steady state uses an open-source image-analysis tool based on Particle Image Velocimetry. The results for the air-water tank show no dependency on... (More)
To ensure safety on upper stage rockets, the fluid dynamic phenomenon known as sloshing in the liquid propellant tanks needs to be understood. CFD is a relatively cheap tool, but studies by Schmitt [7] suggest that models currently used for simulations do not predict the flow behavior.To verify computational models, experiments are setup on a cylindrical tank. The time for thefluid to become steady in a cylindrical tank rotating along the axis is measured for both a com-pletely water filled tank and a tank half-filled with water and half-filled with air. The method for measuring the time until steady state uses an open-source image-analysis tool based on Particle Image Velocimetry. The results for the air-water tank show no dependency on rotational speed or geometry of the tank. The results for the completely filled tank show spin-up times coherent with theoretical data for laminar Ekman layer boundary flow predicted by Sedney and Gerber [8] and show that the spin-up time is given by Es=8/√νΩ (Less)
Popular Abstract
For how long do you have to spin a coffee mug until you can send it in to space? The answer is around five minutes, if you use image analysis tools to track hydrogen bubbles submerged in a water tank. Lund University has together with the European Space Agency worked on a project to determine how instabilities develop in a rotating water tank. The data will used to design the new Ariane rocket, which is scheduled to have its first test-launch during 2020.
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author
Svensson, Jakob LU
supervisor
organization
course
MVKM01 20172
year
type
H2 - Master's Degree (Two Years)
subject
keywords
CFD Computational Fluid Dynamics Experimental Physics Spinning Spin Flow Laser Image Analysis Acceleration Ekman Boundary Layer Rossby Vortex Parabola Particles
report number
ISRN LUTMDN/TMHP-18/5405-SE
ISSN
0282-1990
language
English
id
8938817
date added to LUP
2018-04-17 11:47:29
date last changed
2018-04-18 03:43:53
@misc{8938817,
  abstract     = {{To ensure safety on upper stage rockets, the fluid dynamic phenomenon known as sloshing in the liquid propellant tanks needs to be understood. CFD is a relatively cheap tool, but studies by Schmitt [7] suggest that models currently used for simulations do not predict the flow behavior.To verify computational models, experiments are setup on a cylindrical tank. The time for thefluid to become steady in a cylindrical tank rotating along the axis is measured for both a com-pletely water filled tank and a tank half-filled with water and half-filled with air. The method for measuring the time until steady state uses an open-source image-analysis tool based on Particle Image Velocimetry. The results for the air-water tank show no dependency on rotational speed or geometry of the tank. The results for the completely filled tank show spin-up times coherent with theoretical data for laminar Ekman layer boundary flow predicted by Sedney and Gerber [8] and show that the spin-up time is given by Es=8/√νΩ}},
  author       = {{Svensson, Jakob}},
  issn         = {{0282-1990}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{Exprimental Study of Spin-Up of a Fluid-Filled Cylindrical Tank}},
  year         = {{2018}},
}