Dissertation_Paht_v17.pdf (8.89 MB)
Download file

Bio-inspired Design of a Turbine Stage

Download (8.89 MB)
posted on 30.10.2019, 16:36 by Paht JuangphanichPaht Juangphanich
This dissertation presents a strategy that incorporates nature and bio-inspired shapes to redesign turbine airfoils and stator-rotor rim seal cavity.

The first objective consists of the development of tools to optimize the turbine velocity triangles and then the 3D shape using 75 parameters. Design trends that minimize loss in the stator and rotor were discussed. The second objective expands on the first by incorporating wavy structures at the leading and trailing edges as well as the suction side mimicking design features of seal whiskers and tubercles of a whale. The airfoils were optimized to maximize the efficiency of a highly loaded high-pressure turbine at positive incidence.

The last objective addressed the design of the cavity to reduce cooling massflow and protect the turbine platform. A novel strategy was proposed to assess and optimize the shape of the cavity. In an attempt to simply the problem and identify the main physical phenomena, a slice of the flow was examined by considering a purely a 2D case in the relative frame of reference. This simplification enabled the cavity to be optimized in 2D using a geometry inspired by the meandering of rivers. The optimization produced designs that reduce the heat flux in the rear rotor platform and are less sensitive towards variations in gap and cavity total pressure. The methodology was demonstrated in 3D rotating cavity and later in a full turbine stage configuration. The strategy and design tools developed in this dissertation seek to provide understanding of the effects of bio-inspired shapes on turbine blades and lay the foundation for future experimental research into cavity flows.


Degree Type

Doctor of Philosophy


Aeronautics and Astronautics

Campus location

West Lafayette

Advisor/Supervisor/Committee Chair

Guillermo Paniagua

Additional Committee Member 2

Amy Marconnet

Additional Committee Member 3

Timothee Pourpoint

Additional Committee Member 4

Vikram shyam

Additional Committee Member 5

John Clark

Usage metrics