<p>The study of Surface Air Cooled Oil Coolers (SACOC) is
motivated by the need for new cooling concepts for compact machinery designs
with high thermal load. Installing finned heat exchangers in the bypass duct of
a turbofan engine provides an additional cooling source having transonic flow
as a heat sink. The characterization of the heat transfer and the aerodynamics
of the design are essential to minimize the impact on the overall efficiency of
the engine. In the present study, the SACOC is studied numerically and
experimentally. Two geometries are tested in a high-speed linear wind tunnel
where measurements are taken with multiple sensors and optical techniques. For
the heat transfer characterization, an Inverse Heat Conduction Methodology
(IHCM) based on a Levenberg-Marquardt Algorithm is developed. The experimental
results are matched to numerical simulations using a Reynolds Averaged
Navier-Stokes (RANS) solver. Finally, a multi-objective optimization algorithm is
coupled <a>with the RANS solver</a> to explore new
geometries that maximize the heat transfer and minimize the pressure drop
across the studied domain. The 400 profiles generated allow for the identification
of the features that have a higher influence on the performance of the fins and
six profiles that present large improvements are chosen for further analysis.</p>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/17126585 |
| Date | 19 December 2021 |
| Creators | Antoni Rebassa Torrens (9372002) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/thesis/AEROTHERMAL_CHARACTERIZATION_AND_MULTI-OBJECTIVE_OPTIMIZATION_OF_FINNED_HEAT_EXCHANGERS/17126585 |
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