Conjugate Heat-Transfer Simulations of a Rectangular Nozzle Exhaust Flow over a Film-Cooled Plate

This paper presents Ansys Fluent results for a rectangular exhaust nozzle test case from the 5th AIAA Propulsion Aerodynamics Workshop (PAW05). The main objective of the workshop is to assess the aerothermal interaction of a heated air exhaust with a film-cooled plate downstream of a convergent nozzle exit, which is representative of engine exhaust flow applications with film cooling. Two sets of hierarchical computational meshes are employed. The first set of meshes consists of workshop-provided Pointwise® meshes. The second set of meshes were generated using Ansys Fluent Meshing. Steady conjugate heat transfer (CHT) simulations with radiation are performed to account for heat conduction through solid materials as well as the electromagnetic heat produced by the solid surfaces of the plate, plenum, and nozzle. RANS simulations using the SST-kω turbulence model were conducted for workshop-defined nozzle-and-blowing-ratio-conditions Set Point 42. CFD results are validated against experimental velocity and temperature measurements recorded above the film-cooled plate.