Abstract
Smoothed particle hydrodynamics (SPH) is known to be well adapted for the simulation of dynamic free surface flow. This paper examines the applicability of a weakly compressible SPH Arbitrary Lagrange Euler (ALE) method to the simulation of transient flows in hydraulic machines. The novelty of the approach is to use the properties of SPH-ALE in order to simulate rotor–stator interactions without a rotor–stator interface. Due to the ALE formalism, the particle velocity is a free parameter and can be chosen independently of the flow velocity. Instead of a rotor–stator interface, we have blocks of particles with different particle velocities. To validate the results, the flow field around a static airfoil and the pressure coefficient on the profile are compared with the results of an in-house Euler solver which is an inviscid finite volume code. Results of transient simulations prove the capability of the method to detect unsteady pressure waves and emphasize its applicability to study global phenomena in multistage machines.
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Acknowledgments
The authors would like to thank the Association Nationale Recherche Technologie (ANRT), These 1120/2010, the Consortium Industrie-Recherche en Turbomachines (CIRT), and the ERG (No. 267072). Many thanks to Dr. Arno Gehrer from ANDRITZ Pumps R&D Graz for providing the inviscid reference solution with an in-house finite volume code and to Dr. Martin Rentschler from ANDRITZ Hydro R&D Vevey for the result of the Pelton casing simulation. We further wish to thank Alexandre Dodier for the generation of the NACA geometry and his help with the preparation of the test cases.
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Neuhauser, M., Leboeuf, F., Marongiu, JC., Parkinson, E., Robb, D. (2014). Simulations of Rotor–Stator Interactions with SPH-ALE. In: Gourbesville, P., Cunge, J., Caignaert, G. (eds) Advances in Hydroinformatics. Springer Hydrogeology. Springer, Singapore. https://doi.org/10.1007/978-981-4451-42-0_29
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DOI: https://doi.org/10.1007/978-981-4451-42-0_29
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