Exprimental Study of Spin-Up of a Fluid-Filled Cylindrical Tank
(2018) MVKM01 20172Department 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.
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/8938817
- author
- Svensson, Jakob LU
- supervisor
-
- Xue-Song Bai LU
- organization
- course
- MVKM01 20172
- year
- 2018
- 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}}, }