Low and Heat Transfer in the Tip Region and Endwall Region of an Annular Cascade

The proposed PSU research as part of this project was as follows: Proposed PSU research in year 1:

• Plan and coordinate the parallel effort between UM and PSU experiments.

• Provide tip section profiles to UM .

• Modify the coolant delivery system (from stationary to rotating frame of reference) in AFTRF.

• Remove the rotor, replace four solid blades with four tip cooled blades.

• Balance the rotor and re-assemble the turbine rig.

• Construct the heat transfer surface at the tip section of cooled turbine rotor blade.

• Construct the heat transfer surface at the endwall of cooled turbine rotor blade.

• Connect the heat transfer surfaces in the rotor to stationary frame instrumentation via an existing slip-ring device.

• Exchange information with UM. Proposed PSU research in year 2:

• Complete liquid crystal thermography at the tip of the turbine rotor blade

• Complete liquid crystal thermography at the endwall region of the turbine rotor blade (vary the nozzle/rotor coolant leakage flow).

• Exchange information with UM.

Proposed PSU research in year 3:

• Start Aerodynamic loss measurements for the turbine stage due to tip cooling and nozzle/rotor coolant leakage flow near the endwall.

• Determine change in the total to total efficiency of the turbine stage.

• Exchange information with UM.

• Compile a final report for the investigation.

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