Dipartimento di Meccanica e Aeronautica.
Via Eudossiana, 18 - 00184 Roma - ITALIA
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| Research Interests |
I have been involved since 1993 ( DMA research group led by Prof. Franco Rispoli) in developing a Finite Element based Navier-Stokes solver for the prediction of turbulent, incompressible internal flows, peculiar in turbomachinery engineering fields. During such a period I have had direct research responsibilities concerning the following CFD related topics.
Stabilized Finite Element formulation
Consistent Petrov-Galerkin methods for the stabilization of advective and diffusive limits instability origins on mixed Q2Q1 and equal order Q1Q1 elements.
Available technical notes concerning Finite Element stabilized formulation:
A finite element method for CFD analysis of turbomachinery, SOCRATES/TSM Lecture Note, Budapest University of Technology and Economics, Academic Years 1999-2000 and 2000-2001, also available at http://simba.ara.bme.hu/LETOLT.HTM
Implementation of iterative solver for linear system of equations (GMRes and GMResR), analysis of precontioning techniques.
Pseudo-unsteady algorithm for the solution of steady flow conditions.
Stochastic methods in CFD
Hybrid Finite Element-Monte Carlo method for the solution of advection-diffusion problem on decomposed domain
Turbulence modeling for Turbomachinery flows
Analysis and implementation of advanced turbulence closure. First order anisotropic closure, quadratic and cubic non-linear k-e model.
Evaluation and modeling of rotation effects on advanced first order turbulence closure. Validation of algebraic Reynolds stress modeling.
Available technical notes concerning turbulence modeling activities:
Standard and anisotropic EVMs for near-wall treatment, Technical Note DMA/URLS, November 2001
Explicit algebraic Reynolds stress models for internal flows: I. Plane channel flow Ret = 590., Technical Note DMA/URLS, October 2001
Simultaneously I have matured the following experiences in the turbomachinery framework.
Radial hydraulic turbine
Analysis of three-dimensional flow field in a Francis turbine runner: comparative analysis of standard and non-linear k-e model predicting capabilities.
Axial flow compressor
Cascade flow analysis (CD, DCA and NACA 65 blades).
Analysis of the three-dimensional flow effects on axial rotor of non free vortex design.
Analysis of geometrical modeling of tip clearance region, pinching and embedding techniques.
Annulus wall boundary layer analytical modeling, matching between 3D FEM high-Reynolds and 2D annulus wall low-Reynolds flow solutions accounting for the effect of boundary layer skewing.
Development of original 3D design concept for high performance axial flow fans.
Analysis of sweep effects on axial flow fan.
Unsteady phenomena in axial compressor (rotor - stator interaction, wake, stall, etc.).
Off-design performance prediction of multi-stage compressor.
Available technical notes concerning turbomachinery CFD:
Computational investigation of flow phenomena in axial fan rotor using Navier-Stokes procedure, TN R&D (TéT) Cooperation Project I-28/98, April 1999
Explicit algebraic Reynolds stress models for internal flows: II. DCA cascade flow., Technical Note DMA/URLS, October 2001
Here you can find a brief summary of my recent publications.