Aeroelastic analysis of turbomachinery: Part II – stability computations

Abstract

Part II of the two‐part paper describes an aeroelastic analysis program and its application for stability computations of turbomachinery blade rows. Unsteady Euler or Navier‐Stokes equations are solved on dynamically deforming, body fitted, and grid to obtain the aeroelastic characteristics. Blade structural response is modeled using a modal representation of the blade and the work‐per‐cycle method is used to evaluate the stability characteristics. Non‐zero inter‐blade phase angle is modeled using phase‐lagged boundary conditions. Results are presented for a flat plate helical fan, a turbine cascade and a high‐speed fan, to highlight the aeroelastic analysis method, and its capability and accuracy. Obtained results showed good correlation with existing experimental, analytical and numerical results. Numerical analysis also showed that given the computational resources available currently, engineering solutions with good accuracy are possible using higher fidelity analyses.

Citation

Srivastava, R., Bakhle, M.A., T.G., K. and Hoyniak, D. (2004), "Aeroelastic analysis of turbomachinery: Part II – stability computations", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 14 No. 3, pp. 382-402. https://doi.org/10.1108/09615530410518011