Combined-cycle research program. Interim milestone report on uncooled-airfoil heat-transfer tests

Technical Report · Fri Sep 01 04:00:00 EDT 1978

OSTI ID:5563542

Louis, J F

The design of an effective gas turbine cooling system requires accurate information about the local heat transfer to turbine components, e.g., the turbine nozzles and blades. The MIT Blowdown Facility was used to measure the heat transfer rate to an uncooled airfoil at simulated combined cycle operating conditions of: 2600/sup 0/F (1700/sup 0/K) inlet temperature, 1200/sup 0/F (922/sup 0/K) blade temperature, 12 to 1 overall pressure ratio, and gas-to-blade temperature ratio of 1.8. The airfoil was similar to the design of a first stage stator blade for an advanced utility-size gas turbine having an axial inlet, high subsonic exit Mach number, and good aerodynamic performance. Two adjacent airfoils near the centerline of a one-third scale, eight blade linear cascade were instrumented with miniature calorimeters and pressure taps to provide data for the determination of the Nusselt number distribution around the mid-span periphery of one of the airfoils in fifteen separate tests and the corresponding Mach number distribution around the adjacent airfoil in nineteen test runs. The effect of gas-to-blade temperature ratio was investigated over a range of ratios from 1.05 to 1.87. The mean Nusselt number for the airfoil was determined using the measured local data and was then correlated with Reynolds number and temperature ratio.

• Research Organization: Massachusetts Inst. of Tech., Cambridge (USA). Energy Lab.
• DOE Contract Number: AT01-76ET10420
• OSTI ID: 5563542
• Report Number(s): MIT-2295-T18; ON: DE82011583
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200102* -- Fossil-Fueled Power Plants-- Power Cycles
200104 -- Fossil-Fueled Power Plants-- Components
AERODYNAMICS
AIR FLOW
COMBINED-CYCLE POWER PLANTS
COOLING
COOLING SYSTEMS
DATA
ENERGY SYSTEMS
ENERGY TRANSFER
EXPERIMENTAL DATA
FLOW RATE
FLUID FLOW
FLUID MECHANICS
GAS FLOW
GAS TURBINES
HEAT TRANSFER
INFORMATION
MACH NUMBER
MACHINERY
MECHANICS
NUMERICAL DATA
NUSSELT NUMBER
POWER PLANTS
PRESSURE GRADIENTS
REYNOLDS NUMBER
TEMPERATURE DISTRIBUTION
THEORETICAL DATA
THERMAL POWER PLANTS
TURBINE BLADES
TURBINES
TURBOMACHINERY
VELOCITY
VERY HIGH TEMPERATURE