Effects of Rotor Blade Scaling on High-Pressure Turbine Unsteady Loading
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Derek Lastiwka
Abstract
The present work is a study of the effects of rotor blade scaling of a single-stage high pressure turbine on the time-averaged turbine performance and on parameters that influence vibratory stresses on the rotor blades and stator vanes. Three configurations have been considered: a reference case with 36 rotor blades and 24 stator vanes, a case with blades upscaled by 12.5%, and a case with blades downscaled by 10%. The present results demonstrate that blade scaling effects were essentially negligible on the time-averaged turbine performance, but measurable on the unsteady surface pressure fluctuations, which were intensified as blade size was increased. In contrast, blade torque fluctuations increased significantly as blade size decreased. Blade scaling effects were also measurable on the vanes.
©[2013] by Walter de Gruyter Berlin Boston
Articles in the same Issue
- Masthead
- Study on Practical Application of Turboprop Engine Condition Monitoring and Fault Diagnostic System Using Fuzzy-Neuro Algorithms
- Effect of the Axial Spacing between Vanes and Blades on a Transonic Gas Turbine Performance and Blade Loading
- Study on Design of High Efficiency and Light Weight Composite Propeller Blade for a Regional Turboprop Aircraft
- Effects of Rotor Blade Scaling on High-Pressure Turbine Unsteady Loading
- The Use of Air Injection Nozzles for the Forced Excitation of Axial Compressor Blades
- Effect of Grid Generated Turbulence on Near Field Characteristics of Round Jets
- Study of Shock Wave Control by Suction & Blowing on a Highly-loaded Transonic Compressor Cascade
- Research for the Fluid Field of the Centrifugal Compressor Impeller in Accelerating Startup
- Study of Underexpanded Sonic Jets by Numerical Simulation
- Experimental and Numerical Study of Gap Size and Cooling Flow Rate Effects on Tip Flow of Gas Turbine Blade
- Numerical Investigations of Slip Phenomena in Centrifugal Compressor Impellers
Articles in the same Issue
- Masthead
- Study on Practical Application of Turboprop Engine Condition Monitoring and Fault Diagnostic System Using Fuzzy-Neuro Algorithms
- Effect of the Axial Spacing between Vanes and Blades on a Transonic Gas Turbine Performance and Blade Loading
- Study on Design of High Efficiency and Light Weight Composite Propeller Blade for a Regional Turboprop Aircraft
- Effects of Rotor Blade Scaling on High-Pressure Turbine Unsteady Loading
- The Use of Air Injection Nozzles for the Forced Excitation of Axial Compressor Blades
- Effect of Grid Generated Turbulence on Near Field Characteristics of Round Jets
- Study of Shock Wave Control by Suction & Blowing on a Highly-loaded Transonic Compressor Cascade
- Research for the Fluid Field of the Centrifugal Compressor Impeller in Accelerating Startup
- Study of Underexpanded Sonic Jets by Numerical Simulation
- Experimental and Numerical Study of Gap Size and Cooling Flow Rate Effects on Tip Flow of Gas Turbine Blade
- Numerical Investigations of Slip Phenomena in Centrifugal Compressor Impellers
