Advanced turbine design for coal-fueled engines. Phase 1, Erosion of turbine hot gas path blading: Final report

Technical Report · Thu Apr 01 00:00:00 EST 1993

DOI:https://doi.org/10.2172/10150134· OSTI ID:10150134

Wagner, J H; Johnson, B V

The investigators conclude that: (1) Turbine erosion resistance was shown to be improved by a factor of 5 by varying the turbine design. Increasing the number of stages and increasing the mean radius reduces the peak predicted erosion rates for 2-D flows on the blade airfoil from values which are 6 times those of the vane to values of erosion which are comparable to those of the vane airfoils. (2) Turbine erosion was a strong function of airfoil shape depending on particle diameter. Different airfoil shapes for the same turbine operating condition resulted in a factor of 7 change in airfoil erosion for the smallest particles studied (5 micron). (3) Predicted erosion for the various turbines analyzed was a strong function of particle diameter and weaker function of particle density. (4) Three dimensional secondary flows were shown to cause increases in peak and average erosion on the vane and blade airfoils. Additionally, the interblade secondary flows and stationary outer case caused unique erosion patterns which were not obtainable with 2-D analyses. (5) Analysis of the results indicate that hot gas cleanup systems are necessary to achieve acceptable turbine life in direct-fired, coal-fueled systems. In addition, serious consequences arise when hot gas filter systems fail for even short time periods. For a complete failure of the filter system, a 0.030 in. thick corrosion-resistant protective coating on a turbine blade would be eroded at some locations within eight minutes.

• Research Organization: United Technologies Corp., East Hartford, CT (United States). Research Center
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC21-89MC26052
• OSTI ID: 10150134
• Report Number(s): DOE/MC/26052-3337; ON: DE93000273
• Resource Relation: Other Information: PBD: Apr 1993
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
20 FOSSIL-FUELED POWER PLANTS
COAL-FIRED GAS TURBINES
EROSION
COAL
FLUIDIZED-BED COMBUSTION
COMBUSTION PRODUCTS
HOT GAS CLEANUP
CORROSIVE EFFECTS
TURBINE BLADES
DESIGN
PROGRESS REPORT
PRESSURIZATION
PARTICLE SIZE
DENSITY
FILTERS
330103
200100
TURBINE
POWER PLANTS AND POWER GENERATION