Adjoint calculation of sensitivities of turbomachinery objective functions

Campobasso, M.S., Duta, M.C. and Giles, M.B. (2003) Adjoint calculation of sensitivities of turbomachinery objective functions. Journal of Propulsion and Power, 19(4), pp. 693-703.

Abstract

An overview is presented of the steady and harmonic adjoint methods for turbomachinery design using the discrete approachin which the discretized nonlinearEuler/Navier–Stokes equationsare linearized and the resulting matrix is then transposed. Steady adjoint solvers give the linear sensitivity of steady-state functionals such asmass � ow and average exit � ow angle to arbitrary changes in the geometry of the blades, and this linear sensitivity information can then be used as part of a nonlinear optimization procedure. The harmonic adjoint method is based on a single frequency of unsteadiness and allows one to determine the generalized force acting on the blades due to arbitrary incoming time-periodic gusts. When the forcing is due to the wakes of the upstream blades, the adjointapproach can be used to tailor the shape of the incomingwakes to reduce greatly the level of forced vibration they induce. The presented suite of test cases includes the inlet guide vane and the rotor of a high-pressure turbine.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Campobasso, Dr Michele
• Authors: Campobasso, M.S., Duta, M.C., and Giles, M.B.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Journal of Propulsion and Power
• ISSN: 0748-4658