Design, Analysis, Optimization and Control of Rotor Tip Flows

<p>Developments in turbomachinery focus on efficiency and reliability enhancements, while reducing the production costs. In spite of the many noteworthy experimental and numerical investigations over the past decades, the turbine tip design presents numerous challenges to the engine manufacturers, and remains the primary factor defining the machine durability for the periodic removal of the turbine components during overhaul. Due to the hot gases coming from the upstream combustion chamber, the turbine blades are subjected to temperatures far above the metal creep temperature, combined with severe thermal stresses induced within the blade material. Inadequate designs cause early tip burnouts leading to considerable performance degradations, or even a catastrophic turbine failure. Moreover, the leakage spillage, nowadays often exceeding the transonic regime, generates large aerodynamic penalties which are responsible for about one third of the turbine losses. In this view, the current doctoral research exploits the potential through the modification and optimization of the blade tip shape as a means to control the tip leakage flow aerodynamics and manage the heat load distribution over the blade profile to improve the turbine efficiency and durability.</p>

Name thesis:degree_name

Doctor of Philosophy (PhD)

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Mechanical Engineering

Year

2016

Author dc:creator

• De Maesschalck, Cis Guy M

Contributors dc:contributor

• Guillermo Paniagua
• Ilias Bilionis
• Jay P Gore
• Nicole L Key
• Wolfgang Schroder
• Tom I Shih
• Ali A Ameri
• Francesco Contino
• Laurent Bricteux

• Aerodynamics
• Heat Transfer
• Optimization
• Tip
• Turbines

Repository record dc:identifier

https://docs.lib.purdue.edu/open_access_dissertations/1363

OAI identifier oai:identifier

oai:docs.lib.purdue.edu:open_access_dissertations-2579