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ADVANCED MICROTURBINE SYSTEMS Final Report for Tasks 1 Through 4 and Task 6

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ADVANCED MICROTURBINE SYSTEMS Final Report for Tasks 1 Through 4 and Task 6 ( advanced-microturbine-systems-final-report-tasks-1-through-4 )

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Table 2.1.3 NT154 strength and weibull modulus CARES/LIFE Analysis of ST5+ Ceramic IBR IBR Location / Strength Combined Probability of Failure for IBR Charac. Strength ksi (Weibull Modulus) 90.79 (14.73) 71.44 (14.14) 30.71 (8.93) - 4.32E-05 3.78E-04 3.71E-01 3.71E-01 Probability of Failure Cold Spin Hot Spin Transient Transient Shut-down Start-up 1.51E-04 1.46E-03 1.17E-01 1.18E-01 1.11E-04 1.19E-03 1.10E-01 1.11E-01 9.61E-04 Bore and Disk Volume / Longitudinal ground Disk Surface / Transverse ground Blade / As processed 2.00E-08 3.10E-07 9.61E-04 Average values were used for NT154 strength and Weibull modulus A very basic harmonic analysis of the IBR was performed. Eleven fundamental frequencies and mode shapes were found. Table 2.1.4 lists the frequencies and mode shapes. The disk rotates at 91.5 Hz and the vanes potentially produce a pressure pulse at a frequency of higher than the 1 2 3 4 5 6 7 8 9 10 11 1,373 Hz. Since the harmonic frequencies of the rotor are significantly driving frequencies, no further analysis was preformed. Table 2.1.4 Rotor modal analysis 2,083 Hz 2,376 Hz 5,245 Hz 6,030 Hz 6,208 Hz 9,799 Hz 14,376 Hz 16,018 Hz 18,308 Hz 20,400 Hz 21,367 Hz Turbine Components Mode Frequency Mode Shape One nodal diameter One nodal diameter Zero nodal diameter Zero nodal diameter One nodal diameter Two nodal diameter Zero nodal diameter Two nodal diameter Disk and blade mode Blade flap mode Blade flap mode 2.1.3 EBC Development for Ceramic Efforts in this task focused on assessing the need for an environmental barrier coating on ceramic vane and blade airfoils. As combustion products pass through the cT vane and through the blade throat passage, they sharply decrease in pressure and temperature, while going through significant changes in relative Mach number. An analysis of the cT 40

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