Abstract
The nonlinear harmonic approach has been recently developed, in order to effectively include nonlinear effects in turbomachinery blade flutter analysis. In this paper, the effectiveness in dealing with nonlinear effects associated with shock oscillations are assessed by examining unsteady flows around an oscillating transonic cascade. The computed results using a nonlinear harmonic Euler method are compared with those by a nonlinear time-marching Euler solver. The capability of the new approach is clearly demonstrated, although its limitation in a very nonlinear situation is also indicated. Using the nonlinear harmonic approach, the inviscid Euler method has been extended to a viscous solver with the Navier-Stokes equations and a calculation of unsteady turbulent flow in a transonic diffuser is presented.
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© 1998 Springer Science+Business Media Dordrecht
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He, L., Ning, W. (1998). Nonlinear Harmonic Analysis of Unsteady Transonic Inviscid and Viscous Flows. In: Fransson, T.H. (eds) Unsteady Aerodynamics and Aeroelasticity of Turbomachines. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5040-8_12
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DOI: https://doi.org/10.1007/978-94-011-5040-8_12
Publisher Name: Springer, Dordrecht
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