Comparison of models to predict low engine order excitation in a high pressure turbine stage
2006 (English)In: Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines / [ed] Hall, KC; Kielb, RE; Thomas, JP, 2006, 145-159 p.Conference paper (Refereed)
The paper compares three numerical strategies to predict the aerodynamic rotor excitation sources of "Low Engine Order" (LEO) in a high-pressure turbine stage. Main focus is laid on methods to compute the stator exit flow. The aim is to evaluate computationally cheap approaches to avoid modeling the whole circumference of the stator. A single passage viscous strategy, a single passage inviscid linear blade movement strategy, and a viscous multi-passage sector strategy are compared and evaluated. The assessment of the prediction quality is made by comparison of the computed stator exit flow to experimental data. The main result is that only the global behavior of the stator exit flow is estimated right, both the level and amplitude of Mach number and pressure are computed with poor agreement to experiments. Future evaluations of the resulting rotor excitation pressure are needed to estimate the level of necessary agreement to give acceptable predictions of the low engine order forced response.
Place, publisher, year, edition, pages
2006. 145-159 p.
forced response, low engine order excitation, high pressure turbine, stator non-uniformity
IdentifiersURN: urn:nbn:se:kth:diva-42251DOI: 10.1007/1-4020-4605-7_12ISI: 000237275800012ISBN: 1-4020-4267-1OAI: oai:DiVA.org:kth-42251DiVA: diva2:446353
10th International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines (ISUAAAT) Location: Duke Univ, Durham, NC Date: SEP 08-11, 2003
QC 201110072011-10-072011-10-062011-10-07Bibliographically approved