Development of S3D and Adjoint Design Methods for Efficient Aerodynamic Design of Three-Dimensional High-Speed Compressor Blades

In the second part of the study, an adjoint design method was employed for compressor design to broaden the range of design capability, to facilitate 3D design applications, and to complement the S3D design method. An adjoint design code was developed, based on a 3D compressor flow analysis code, using the discrete adjoint method for the Euler equations. Unlike external flows where any near-field disturbances are attenuated at far-field, internal flow problems create improper interactions of adjoint variables between boundaries because boundary surfaces are closely facing each other. A validation study on sensitivities reveals that, in internal flow problems, constraints should be imposed on internal boundaries to reflect proper physics of the adjoint system. The design results of the adjoint method indicate that the method enables highly efficient 3D designs by drastically reducing the computational cost of sensitivity analysis and that it can be combined with the S3D method to provide a practical and efficient 3D design tool for transonic compressor blades.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Aerospace Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Chung, June

Contributors dc:contributor

• Ki Dong Lee

• Engineering, Aerospace

Language dc:language

eng

Identifier

(MiAaPQ)AAI3069983

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/85073