This paper describes preparation, execution and evaluation of a comprehensive bladed disk spin test series. At the example of an turbine impeller the effects of rotation and temperature are analyzed with special focus on mistuning and damping. The forced response is measured synchronously via 13 identical positioned strain gauges on each blade as well as via blade tip-timing. Subsequently it is possible to compare the results of both systems. During the test series rotational speed varies in the range from 10.000 up to 19.000 RPM. Simultaneously, the wheel is heated up to 820 K by an oven. A number of pre-selected natural frequencies, damping ratios and operating deflection shapes are evaluated and compared with respect to different rotational speeds and impeller temperatures.
Vacuum Spin Test Series of a Turbine Impeller With Focus on Mistuning and Damping by Comparing Tip Timing and Strain Gauge Results
- Views Icon Views
- Share Icon Share
- Search Site
Maywald, T, Beirow, B, Heinrich, CR, & Kühhorn, A. "Vacuum Spin Test Series of a Turbine Impeller With Focus on Mistuning and Damping by Comparing Tip Timing and Strain Gauge Results." Proceedings of the ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. Volume 7B: Structures and Dynamics. Montreal, Quebec, Canada. June 15–19, 2015. V07BT32A013. ASME. https://doi.org/10.1115/GT2015-42649
Download citation file: