Some possible future High Fidelity CFD codes for LES simulation of turbomachinery are compared on several test cases increasing in complexity, starting from a very simple inviscid Vortex Convection to a multistage axial experimental compressor. Simulations were performed between 2013 and 2016 by major Safran partners (Cenaero, Cerfacs, CORIA and Onera) and various numerical methods compared: Finite Volume, Discontinuous Galerkin, Spectral Differences. Comparison to analytical results, to experimental data or to RANS simulations are performed to check and measure accuracy. CPU efficiency versus accuracy are also presented. It clearly appears that the level of maturity could be different between codes and numerical approaches. In the end, advantages and disadvantages of every codes obtained during this project are presented.
This paper combines a nonlinear frequency-domain scheme with a high-order spectral-difference discretization for the two-dimensional unsteady Euler equations. An implicit lower/upper symmetric Gauss-Seidel method is introduced to solve the nonlinear frequency-domain equations. High-order accuracy and solution acceleration due to the implicit treatment are numerically verified on the vortex advection and subsonic airfoil test cases. Finally, the performance of this implicit high-order scheme on a fully compact stencil for periodic flows is evaluated on a pitching-airfoil problem.velocity components w = state vector w = Fourier coefficient of the state vector x, y = coordinates (physical domain) = angle of attack = specific heats ratio " = vortex strength , = coordinates (computational domain) = density = pseudotime = solution shape function ', = flux shape function s = solution point coordinate s1=2 = flux point coordinate ! r = reduced frequency
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.