Ga. Gerolymos et C. Hanisch, Multistage three-dimensional Navier-Stokes computation of off-design operation of a four-stage turbine, P I MEC E A, 213(A4), 1999, pp. 243-261
Citations number
39
Categorie Soggetti
Mechanical Engineering
Journal title
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
In this paper a three-dimensional computational methodology for multistage
turbomachinery flows is developed, validated and applied in analysing the r
educed mass flowrate operation of a four-stage turbine. The flow is modelle
d by the three-dimensional Favre-Reynolds-averaged Navier-Stokes equations
using the Launder-Sharma near-wall k-epsilon turbulence closure, which are
integrated using an implicit third-order upwind solver. The computation mod
els the eight blade rows, including the tip clearance gaps of the rotors, u
sing a 6 x 10(6) points grid, and computes the time-averaged flow using mix
ing planes between rows. Computational results are compared with measuremen
ts for various operating points. After this validation the method is used i
n a first attempt to analyse the three-dimensional flow at reduced-mass-flo
w operation.