Traditionally, the optimization of a turbomachinery engine casing for tip clearance has involved either twodimensional transient thermomechanical simulations or three-dimensional mechanical simulations. This paper illustrates that three-dimensional transient whole-engine thermomechanical simulations can be used within tip clearance optimizations and that the efficiency of such optimizations can be improved when a multifidelity surrogate modeling approach is employed. These simulations are employed in conjunction with a rotor suboptimization using surrogate models of rotor-dynamics performance, stress, mass and transient displacements, and an engine parameterization.
Toal, D. J. J., Keane, A. J., Benito, D., Dixon, J. A., Yang, J., Price, M., ... Kill, N. (2014). Multi-Fidelity Multidisciplinary Whole Engine Thermo-Mechanical Design Optimization. Journal of Propulsion and Power, 30(6), 1654-1666. https://doi.org/10.2514/1.B35128