Abstract: High-fidelity simulations are used to conduct controlled numerical experiments to investigate the effect of periodically incoming wakes on profile and three-dimensional loss mechanisms. The present work considers the ...

Abstract: Despite the demonstrated utility of Reynolds-averaged Navier–Stokes (RANS) calculations for many industrially relevant problems, the method yields unsatisfactory representations of many flows of engineering interest, such ...

Abstract: Streamwise micro-groove surfaces (“riblets”) are well known as a passive surface treatment to reduce drag, which may assist in increasing overall gas turbine efficiency. The first direct numerical simulation of micro-scaled ...

Abstract: Turbine blades generally present surface roughness introduced in the manufacturing process or caused by in-service degradation, which can have a significant impact on aero-thermal performance. A better understanding of the ...

Abstract: Substantial research exists in the literature on reducing the profile loss of transitional boundary layers over low-pressure turbine (LPT) blades via different mechanisms such as freestream turbulence, upstream wakes, and ...

Abstract: Recent research has demonstrated the effectiveness of riblets (streamwise aligned grooves) in reducing the profile loss of low-pressure turbine (LPT) blades under high-lift (HL) loading. In this research, we pursue the ...

Abstract: High-fidelity simulation of transitional and turbulent flows over multi-scale surface roughness presents several challenges. For instance, the complex and irregular geometrical nature of surface roughness makes it impractical ...