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Alakbari, Abdullah Al

University of British Columbia

cooling process on a run-out table is a critical step that governs the final microstructure and the mechanical properties of the produced steels. In this research, we use a more recent method for obtaining the thermal history on the plate surface, which is the infrared thermal imaging technique. This technique has the advantage of capturing the surface temperature history remotely and with no contact with the plate. In this work, controlled cooling experiments under transient conditions were conducted on a hot stationary plate using an impinging top circular nozzle and a thermal camera to capture the temperature history. The measurements from the thermal camera (conducted in Abu Dhabi University) are compared with the conventional thermocouple measurements (University of British Columbia). The comparisons showed that the infrared camera gives more complete picture of the thermal history and more accurate results than thermocouple measurements. Reasons for the inaccuracy of the thermocouple (T/C) measurements include T/C response time, and distortion of the thermal field by the method of installation. These reasons are discussed in detail in the thesis. Additionally, we introduce a transient multiphase CFD numerical simulation to obtain the temperature profile on the plate surface and compare it with the experiments conducted. The numerical simulation was done using the Ansys-Fluent CFD software. A two-dimensional model was used with a highly intensive mesh near the wall region based on the wall y+ number. The surface temperature graphs for both measurements and simulation are compared at different radial locations (stagnation zone and parallel zone). Additionally, the obtained CFD results were verified and compared with the surface temperature of the experimental data.

Text

2023-08-23

Attribution-NonCommercial-NoDerivatives 4.0 International

http://hdl.handle.net/2429/85594

Mechanical Engineering

University of British Columbia

UBCV

http://creativecommons.org/licenses/by-nc-nd/4.0/