ASSESSMENT OF NON-PROPRIETARY CODES FOR FLUTTER PREDICTION IN A COMPRESSOR STAGE
Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
A flutter analysis is performed in a compressor stage. The flutter analysis is carried out using two non-proprietary CFD codes using the influence coefficient technique. The non-proprietary codes are based on the time marching approach and non-linear harmonic approach. A sensitivity analysis has been performed to determine an optimum setup with respect to the mesh resolution, turbulence model, residual, time steps, time periods and number of passages for the two non-proprietary codes. The flutter analysis is carried out at the design point based on the compressor map. The flutter analysis is carried out for two configurations based on the blade alone mode shapes and blisk mode shapes. The flutter analysis for both the configurations reveals the rotor is stable for all the nodal diameters. Finally a flutter sensitivity study with respect to mesh and turbulence models is carried out indicating variability in prediction.
Place, publisher, year, edition, pages
2012. , 61 p.
Flutter, Turbomachinery Aeroelasticity, Compressor
IdentifiersURN: urn:nbn:se:kth:diva-117688OAI: oai:DiVA.org:kth-117688DiVA: diva2:602757
Subject / course
Master of Science - Turbomachinery Aeromechanic University Training
2012-12-13, M263, Brinellvägen 68,, Stockholm, 12:58 (English)
VOGT, DAMIAN, DR.
VOGT, DAMIAN, Dr.