Heat Transfer Laboratory
The Heat Transfer Lab works with various experiments mainly related to flow in gas turbines, flow through porous media, and electronics cooling. The group's current focuse is gas turbines. The researchers study the flow and heat transfer over a turbine cascade endwall. The flow operates under high Reynolds number conditions and is highly turbulent with a large range of eddy length-scales. Due to the complexity of gas turbine experiments and flow, which includes many simplified models of the real engine, numerical simulations are very helpful in giving greater insight into the limitations of the test facility and, more importantly, the extent to which different numerical models predict the flow in gas turbines. Due to the large range of eddy scales, practice has shown that RANS (Reynolds Averaged Navier Stokes) predicts much a larger turbulence dissipation, which lead to lower levels of turbulence in the cascade. Getting the turbulence right is vital for this kind of flow because it characterizes the mixing within the passage. Therefore, LES models are usually used instead of RANS. LES requires high computational resources with large RAM and storage memory compared with RANS. For this research, the researchers use MSI resources to conduct RANS and LES simulations using ANSYS Fluent.
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