Posted on: 28 May 2014 by Mark Howells
The high-speed low-pressure turbine (LPT) made by MTU Aero Engines for the Pratt & Whitney PurePower PW1100G-JM geared turbofan (GTF) engine to power the A320neo has passed its mandatory stress tests.
These complex telemetry runs, an official certification requirement for this module, are considered one of the biggest challenges in engine testing. They serve to measure the vibrational stresses acting on the blades, along with the thermal load and temperature distribution. The high-speed LPT was fitted with some 400 special measurement sensors. During 20 hours of testing, the propulsion system was put through its paces, also at overspeed conditions.
Oskar Schnell, director, program management, PurePower PW1100G-JM, commented, “The stress test went well. All the test results have matched our predictions, and in fact we finished ahead of schedule.” With the stress tests successfully completed, the engine has passed another important milestone on its way to certification, which is scheduled to take place this year.
MTU has also performed these tests on other PurePower engines that power the Mitsubishi Regional Jet and Bombardier’s CSeries family. All tests were witnessed by colleagues from Pratt & Whitney. “The team did a perfect job conducting the test runs. It’s very important for the engineers to be here with us on site, so we can reach decisions quickly if need be,” added Kurt Scheidt, senior manager, engine and flight test at MTU.