Salkhordeh, Sasan
(2016)
Large Eddy Simulations of Isothermal and Non-Isothermal Turbulent Flows for High Temperature Gas Cooled Reactors.
Doctoral Dissertation, University of Pittsburgh.
(Unpublished)
Abstract
In order to develop an experimentally validated computational model for the lower plenum of High Temperature Gas-Cooled Reactors (HTGR), three separate Large Eddy Simulation (LES) studies are conducted. First, detailed study is made of LES for an isothermal turbulent jet, which is compared to well-accepted experimental data. Inconsistencies in the literature surrounding the Reynolds number dependence for the turbulent statistics are comprehensively addressed. Second, a non-isothermal LES study of flow over a cylinder is conducted, and includes comparison between experimental data and LES for different subcritical Reynolds numbers. The final study is that of LES for a non-isothermal round jet, where the effect of a precursor simulation is found to play a vital role for capturing the underlying physics within the turbulent Navier Stokes and energy equations. Good agreement is obtained between our LES predictions and experimental measurements in both near-field and far-field data. This research lays the groundwork needed to develop high-fidelity, experimentally validated computational models of the complex mixing flow in the HTGR lower plenum.
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Details
| Item Type: |
University of Pittsburgh ETD
|
| Status: |
Unpublished |
| Creators/Authors: |
|
| ETD Committee: |
|
| Date: |
26 January 2016 |
| Date Type: |
Publication |
| Defense Date: |
17 November 2015 |
| Approval Date: |
26 January 2016 |
| Submission Date: |
4 December 2015 |
| Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
| Number of Pages: |
96 |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
Swanson School of Engineering > Mechanical Engineering and Materials Science |
| Degree: |
PhD - Doctor of Philosophy |
| Thesis Type: |
Doctoral Dissertation |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
Large Eddy Simulation, High Temperature Gas Cooled Reactors |
| Date Deposited: |
26 Jan 2016 15:09 |
| Last Modified: |
21 Sep 2017 14:41 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/26593 |
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