PROGRESSES IN PARTICLE-LADEN FLOWS SIMULATIONS IN MULTISTAGE TURBOMACHINERY WITH OPENFOAM

Stefano Oliani, Riccardo Friso , Nicola Casari, Michele Pinelli, Alessio Suman, Mauro Carnevale

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Numerical simulations of particle-laden flows have received growing attention in the last decade, due to the broad spectrum
of industrial applications in which discrete phases prediction is of interest. Among these, ingestion of particles by turbomachinery is an area that is seeing vivid research and studies. The most
common technique to tackle this kind of problem is the Eulerian Lagrangian method, in which individual particles are tracked
inside the domain. At the same time, in multi-stage turbomachinery simulations interfaces are needed to couple the flow solution in adjacent domains in relative motion. In this work, an open-source extension for Lagrangian simulations in multistage rotating machines is presented in the foam-extend environment.
Firstly, a thorough discussion of the implementation is presented, with particular emphasis on particle passage through General Grid Interfaces (GGI) and mixing planes. Moreover, a massconservative particle redistribution technique is described, as such a property is requested at interfaces between Multiple Reference Frame (MRF). The peculiarities of the algorithm are then shown on a relevant test-case. Eventually, three turbomachinery
applications are presented, with growing complexity, to show the capabilities of the numerical code in real-life applications. Simulation results in terms of erosion and impacts on aerodynamic surfaces are also presented as examples of possible parameters of interest in particle-laden flow computations.
Original languageEnglish
Title of host publicationProceedings of ASME Turbo Expo 2021:
Publication statusAcceptance date - 16 Mar 2021

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