Improving Durability of Turbine Components Through Trenched Film Cooling and Contoured Endwalls

 

Performer: 
University of Texas at Austin
The combined cooling effects of TBC (Thermal Barrier<br/>Coating) and film cooling are shown in the distributions of<br/>overall cooling effectiveness, f, presented here for<br/>no TBC, moderate thickness TBC, and thick TBC.
The combined cooling effects of TBC (Thermal Barrier
Coating) and film cooling are shown in the distributions of
overall cooling effectiveness, f, presented here for
no TBC, moderate thickness TBC, and thick TBC.
Website:  University of Texas at Austin
Award Number:  FE0005540
Project Duration:  10/01/2010 – 09/30/2014
Total Award Value:  $627,802.00
DOE Share:  $500,000.00
Performer Share:  $127,802.00
Technology Area:  Advanced Energy Systems
Key Technology:  Hydrogen Turbines
Location:  Austin, Texas

Project Description

Wind tunnel facilities at The Pennsylvania State University (Penn State) and University of Texas at Austin (UT) have been specifically designed to simulate film cooling of turbine vanes, blades, and endwalls. These facilities incorporate equipment that simulates the deposition of contaminants in the turbine by using molten wax particles to simulate the molten contaminant particles that occur at actual engine conditions. The wax particles used in the test facilities are sized appropriately to simulate the inertial behavior of particles that exist in engine conditions. The use of wax also allows for the simulation of the liquid-to-solid phase change that is essential to the primary deposition mechanism.

UT will be focusing on the performance of shallow trench film cooling configurations for various positions on the suction and pressure sides of a simulated vane with active deposition. Meanwhile, Penn State will be investigating the effect of active deposition on various endwall cooling configurations. Preliminary results show that deposition could be simulated dynamically using wax and that the effects of deposition could be quantified using infrared thermography. New endwall and vane surface film cooling configurations will be developed to minimize deposition and maximize cooling performance under contaminated conditions.

Project Benefits

This project will utilize wind tunnel facilities to simulate film cooling of turbine vanes, blades, and endwalls using molten wax. Turbine aerodynamics and heat transfer research will develop advanced cooling technology that will allow for higher firing temperatures which translate into increased cycle efficiency. Specifically, this project will analyze the wax particle depostion for shallow trench cooling configurations of a simulated vane and various endwall cooling configurations using infrared thermography.

Contact Information

Federal Project Manager 
Robin Ames: robin.ames@netl.doe.gov
Technology Manager 
Richard Dennis: richard.dennis@netl.doe.gov
Principal Investigator 
David Bogard: dbogard@mail.utexas.edu
 

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