Study of shock movement and unsteady pressure on 2D generic model
2006 (English)In: Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines / [ed] Hall, KC; Kielb, RE; Thomas, JP, 2006, 409-421 p.Conference paper (Refereed)
A flexible generic model has been developed at the Chair of Heat and Power Technology in order to perform fatter experiments in a more fundamental fashion. It is made of engineered flexible material and oscillate in a controlled way at non-uniform amplitude and variable frequencies. Time-resolved measurements of the unsteady surface pressures, the instantaneous model geometry as well as unsteady Schlieren visualizations are performed in order to study the shock wave motion and the aerodynamic load acting over this flexible generic bump. The model oscillates at reduced frequencies from 0.015 to 0.294 at transonic flow condition. The mode shapes of such a flexible bump strongly depends on the excitation frequency of the generic model. Schlieren pictures are obtained for an operating point characterized by an inlet Mach number of 0.63. Moreover, the presented results demonstrate that the phase of shock wave movement towards bump local motion shows a decreasing trend for the third bending mode shapes at reduced frequency higher than k=0.074. At the pressure taps located after the shock wave formation, the phase of pressure fluctuations towards bump local motion presents the same decreasing trend.
Place, publisher, year, edition, pages
2006. 409-421 p.
fluid-structure interaction, Schlieren, long line probe, shock wave movement, unsteady static pressure, first bending mode shape, flexible generic model
IdentifiersURN: urn:nbn:se:kth:diva-42253DOI: 10.1007/1-4020-4605-7_30ISI: 000237275800030ISBN: 1-4020-4267-1OAI: oai:DiVA.org:kth-42253DiVA: diva2:446235
10th International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines (ISUAAAT) Location: Duke Univ, Durham, NC Date: SEP 08-11, 2003
QC 201110062011-10-062011-10-062011-10-06Bibliographically approved