Cadence will be delighted to present the fundamentals and the applications of the harmonic methodology, on which Numeca invested large development efforts throughout the last 15 years.
The harmonic approach consists of solving turbomachinery unsteady models - known to be clearly dominated by blade passing frequencies and associations - in frequency space, leading to large savings in computational costs. Initially developed for 1-stage analyses, or as a 1-stage limited approach integrated in multistage environments, the method has been generalized to account for multiple stages and arbitrary interactions.
The efficiency and accuracy of the approach is illustrated by many applications, such as rotor/stator, clocking, impeller-volute interactions, conjugate heat transfer, tonal noise modeling, and propagation of hot streaks and distortion through multistage environments.
Biography
Mateus Teixeira is a Principal Application Engineer at Cadence Design Systems working with North American partners in benchmarks, supports and pre-sales operations of turbomachinery CFD solutions. He has received a M.S. degree in Turbomachinery Aeromechanics from KTH, Sweden and a Masters of Engineering degree with specialization in Unsteady Aerodynamics from Duke University, USA. His main work areas comprise turbomachinery aeroelasticity, flow distortion, inter-components interactions, and frequency domain CFD simulations.
Stéphane Vilmin is a R&D software architect at Cadence Design Systems working in the CFD of turbomachinery unsteady flows. His Ph.D. in CFD, received from the Turbomachinery Laboratory at the Swiss Institute of Technology Lausanne in 1998, focused on turbulence modeling on unstructured meshes. He then joined the Whittle Laboratory and the CFD Laboratory at the University of Cambridge as a research associate, for the implementation and extension of a laminar-to-turbulent transition model in an unsteady flow solver. For Numeca International since 2003, and for Cadence since 2020, he has been specializing in the development of a nonlinear harmonic method for turbomachinery CFD.
