TY - GEN
T1 - A numerical solver for dense gas flows
AU - Cinnella, Paola
AU - Congedo, Pietro M.
PY - 2004/12/1
Y1 - 2004/12/1
N2 - Dense Gas Dynamics studies the flow of gases in the thermodynamic region near the liquid-vapor critical point. In such a region the perfect gas law is invalid and has to be replaced with noticeably more complex equations of state. In the present work, a numerical solver is proposed for inviscid flows governed by arbitrary equations of state. In particular, the stress is put on the choice of a suitable space discretisation scheme for dense gas problems. Two different schemes are considered: the first one, uses a third-order centred approximation with addition of scalar artificial viscosity; the second one, is a second-orderaccurate upwind scheme based on Roe's flux difference splitting. Detailed cross-comparisons of the two schemes are provided for a variety of transonic flow problems past airfoils and turbine blades in order, on the one hand, to validate the numerical code and, on the other, to select the most suitable scheme in terms of accuracy and computational cost. The final objective is to develop a simple, low-cost, accurate solver for the analysis of dense gas flows.
AB - Dense Gas Dynamics studies the flow of gases in the thermodynamic region near the liquid-vapor critical point. In such a region the perfect gas law is invalid and has to be replaced with noticeably more complex equations of state. In the present work, a numerical solver is proposed for inviscid flows governed by arbitrary equations of state. In particular, the stress is put on the choice of a suitable space discretisation scheme for dense gas problems. Two different schemes are considered: the first one, uses a third-order centred approximation with addition of scalar artificial viscosity; the second one, is a second-orderaccurate upwind scheme based on Roe's flux difference splitting. Detailed cross-comparisons of the two schemes are provided for a variety of transonic flow problems past airfoils and turbine blades in order, on the one hand, to validate the numerical code and, on the other, to select the most suitable scheme in terms of accuracy and computational cost. The final objective is to develop a simple, low-cost, accurate solver for the analysis of dense gas flows.
M3 - Conference contribution
AN - SCOPUS:84896789435
SN - 9781624100314
T3 - 34th AIAA Fluid Dynamics Conference and Exhibit
BT - 34th AIAA Fluid Dynamics Conference and Exhibit
T2 - 34th AIAA Fluid Dynamics Conference and Exhibit 2004
Y2 - 28 June 2004 through 1 July 2004
ER -