Analytical and numerical study of instability of supercritical water flowing upward in two heated parallel channels with wall thermal energy storage effects
| dc.contributor.author | Ghadge, Dhanashree | |
| dc.contributor.examiningcommittee | Ruth, Douglas (Mechanical Engineering) Okhmatovski, Vladimir (Electrical and Computer Engineering) | en_US |
| dc.contributor.supervisor | Chatoorgoon, Vijay (Mechanical Engineering) Ormiston, Scott (Mechanical Engineering) | en_US |
| dc.date.accessioned | 2019-01-24T15:30:35Z | |
| dc.date.available | 2019-01-24T15:30:35Z | |
| dc.date.issued | 2018-10-30 | en_US |
| dc.date.submitted | 2019-01-24T00:10:24Z | en |
| dc.degree.discipline | Mechanical Engineering | en_US |
| dc.degree.level | Master of Science (M.Sc.) | en_US |
| dc.description.abstract | The wall thermal energy storage effects on supercritical thermal hydraulic instability were investigated using a 1D-Linear frequency domain solution and 3D- Non-linear ANSYS CFX solution. Experimental cases of supercritical upward flow in two heated parallel channels were analysed. The one-dimensional (1D) analyses were done with two different wall thicknesses using uniform and non-uniform power distributions. It was found that the inclusion of wall thermal energy storage effects gives better prediction of thermal hydraulic instability in these two heated parallel-channel cases, which contradicts the conclusions of previous studies with wall thermal energy storage effects. Accurate prediction of the period of oscillation was also obtained. The 3D- numerical solution with wall also gives an excellent agreement with the experiments, for the instability boundary. A common CFD assumption; namely, circumferentially symmetric flow, was found to be inadequate. Temporal and grid independence was ensured for the reported cases. The predictions of period of oscillation obtained with the non-linear 3D ANSYS CFX code are discussed. Additionally, non-dimensional parameters were derived for the conversion of experimental data from one fluid to another in a given test facility and validated using 1D- linear solution. | en_US |
| dc.description.note | February 2019 | en_US |
| dc.identifier.citation | Ghadge D., and Chatoorgoon V.. 2018. “Analytical Study of Supercritical Water Flow in Two Heated Parallel Channels with Wall Heat Effect.” In London, UK. | en_US |
| dc.identifier.uri | http://hdl.handle.net/1993/33729 | |
| dc.language.iso | eng | en_US |
| dc.rights | open access | en_US |
| dc.subject | Supercritical, Non dimensional parameters, SCWR, Thermofluid, CFD, Wall heat effects | en_US |
| dc.title | Analytical and numerical study of instability of supercritical water flowing upward in two heated parallel channels with wall thermal energy storage effects | en_US |
| dc.type | master thesis | en_US |
| local.subject.manitoba | yes | en_US |