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Geometry nonconformances are diverse variations in the actual compo- nent geometry with respect to the intended ideal design. These dier- ences in the geometry can occur either at component manufacturing or later during the exploitation as a result of component wear and repara- tions. Typical geometry nonconformances are nonideal shapes and posi- tions due to tolerances, manufacturing traces such as shrinkage, warps, welds, repairs of various type, e. g., patches, and other shape deviations such as surface roughness. There are also so-called nominal nonconfor- mances which include, e. g., steps, gaps, |llets, bumps, and installation holes. Improvement of the aerodynamic component performance requires understanding of the impact of these technological features on the funda- mental §ow |eld. In the current study, experiments and computational §uid dynamics (CFD) simulations are performed on two dierent types of nonconformances on the outlet guide vanes in order to study the eect of the nonconformances on the aerodynamic performance and to validate the computation design tool.

Effect of nonconformances on the aerodynamic performance of low-pressure turbine outlet guide vanes