Fast estimation of unsteady flows in turbomachinery at multiple interblade phase angles


Journal Article

A technique to estimate the unsteady flows in turbomachinery for many interblade phase angles was analyzed. The construction of the approximate solution technique starts with a pair of three-dimensional Euler (or Navier-Stokes) flow solvers. The accuracy of the approximate solutions for the interblade phase angles which are not members of the basic solutions depends on the number of snapshots used and the location of the snapshots. The minimum number of snapshots needed for accurate answers is not known a priori but an estimate of the error can be computed a posteriori. An estimate of the unsteady solution is computed at any interblade phase angles using the fast approximate solution technique. The main computational cost of the method is the determination of a handful of snapshot solutions and once these solutions are obtained the rest of the unsteady solutions can be predicted with very little additional computational cost.

Full Text

Duke Authors

Cited Authors

  • Ekici, K; Hall, KC

Published Date

  • September 1, 2006

Published In

Volume / Issue

  • 44 / 9

Start / End Page

  • 2136 - 2142

International Standard Serial Number (ISSN)

  • 0001-1452

Digital Object Identifier (DOI)

  • 10.2514/1.23288

Citation Source

  • Scopus