Common menu bar links
Enquiries: NRC-IAR
Phone: 613-990-0765
1200 Montreal Road,
M-3
Ottawa,
Ontario,
K1A 0R6
Canada
Careers
News
Events
Related Information
Institutes & Programs
Key Sectors
Areas of Research
Communities
Accelerated Mission Testing
Critical components of newly designed engines, (compressor rotors, combustors, turbine nozzles and rotors) as well as repaired or refurbished parts, have to be tested under realistic operating conditions to verify their endurance. In the past, gas turbines were subjected to straight endurance testing, as given in the military qualification tests MIL-E-5007D. IAR provides accelerated mission testing (AMT), a structural durability test, which is a cost-saving alternative to conventional full-time endurance testing.
AMT also has the advantage of being able to simulate the effects of specific aircraft missions. In essence, AMTs eliminate, or reduce, the engine operation phases which contribute very little to the stressing of the part under investigation. IAR's tests contain all the damaging elements in service that drive the particular failure modes. The major throttle excursions drive low cycle fatigue and thermal fatigue failure modes, while the dwell time at high power conditions contributes to creep, stress rupture, hot corrosion and erosion failure phenomenon. For the most part, AMT has been accepted by major engine manufacturers as an important tool for testing whole engines, and/or their components, in a cost-effective way. For cost purposes and ease of setup, most AMT testing takes place under sea-level-static conditions.
 |
| Thermal barrier coating suffering from erosion on 1st stage nozzle guide vane (T56). |
Related Information
