2026-09-19T11:33:21Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/85073 2023-07-11 col_2142_5131 col_2142_14800 com_2142_5130 com_2142_14799 com_2142_234

Ki Dong Lee Chung, June 2015-09-25T22:34:19Z 2015-09-25T22:34:19Z 10000-01-01 2002 2002 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. Made available in DSpace on 2015-09-25T22:34:19Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3069983.pdf: 7844079 bytes, checksum: ebf74a978823d22f2dec1ddbce68a3d6 (MD5) Previous issue date: 2002 Embargo set by: Seth Robbins for item 86354 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 197 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2002. http://hdl.handle.net/2142/85073 (MiAaPQ)AAI3069983 eng Engineering, Aerospace Development of S3D and Adjoint Design Methods for Efficient Aerodynamic Design of Three-Dimensional High-Speed Compressor Blades text Aerospace Engineering Aerospace Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.