Date of Award
2025
Document Type
Thesis
Degree Name
Master of Science in Engineering (MSE)
Department
Aerospace Systems Engineering
Committee Chair
Phillip Ligrani
Committee Member
Guangsheng Zhang
Committee Member
Haiyang Hu
Research Advisor
Phillip Ligrani
Subject(s)
Turbomachines--Blades--Design and construction, Turbomachines--Blade--Fluid Dynamics, Heat--Transmission, Additive manufacturing
Abstract
The investigation results presented here consider the heat transfer characteristics of seven different turbine blade tips. Six of the blades are additive manufactured with GRX-810, followed by different surface enhancement post processing techniques. Those techniques include as built, abrasive flow machining, chemical polishing with chemical mechanical polishing, micromachining, chemical polishing, and electropolishing. The seventh blade is machined with 1016 steel. These procedures give a different surface texture roughness for each blade. A transonic linear cascade within a transonic/supersonic wind tunnel is utilized. The impulse response method is employed to determine heat transfer coefficient distributions for the blades. The Tad/T0i temperature ratio distributions are used to determine the tip gap Mach number distributions for the blades. Local heat transfer coefficient values along the blade tips are generally larger with the rougher surface texture relative to the smoother surface textures, which are associated with locally lower tip gap flow Mach numbers.
Recommended Citation
Tatge, Morgan, "Heat transfer of additively manufactured turbine alloy blade tips with different surface enhancement post-processing methods" (2025). Theses. 740.
https://louis.uah.edu/uah-theses/740