@inproceedings{920c537bd9d5425081d5e28f7cbaf0fe,
title = "Effect of altitude on turbomachinery vibration in an aircraft compression-ignition engine",
abstract = "To investigate the effect of altitude on vibrations in a turbocharger, an aircraft compression-ignition engine was operated in both a sea level cell and an altitude chamber up to 25, 000 ft (7620 m). The turbocharger was instrumented with a nonintrusive stress measurement system to analyze the frequencies, magnitudes, and critical speeds of the blade bending modes as the ambient pressure, ambient temperature, and engine power varied. The measurements were also compared to data from accelerometers mounted on the compressor housing. At sea level conditions, the largest deflection amplitudes were associated with excitations of the first blade bending mode. These deflections grew in amplitude as the altitude increased and the turbocharger/engine worked harder to produce the required pressure rise and power. There was also evidence of a higher-order mode being excited at elevated altitudes. By understanding the factors contributing to resonance and flutter in aircraft turbomachinery, modeling and prediction tools can be improved to update operating envelopes for current designs and minimize these phenomena in future, aviationspecific designs.",
keywords = "Aeroelasticity, Aircraft compression-ignition engine, Fluid-structure interaction, Flutter, Resonance, Turbocharger, Turbomachinery, Vibration3",
author = "McGowan, {Ryan C.} and Fellows, {David W.} and Bodony, {Daniel J.} and Mojica, {Jovany R.} and Pieri, {James J.} and Kweon, {Chol Bum M.} and Gibson, {Joseph A.} and Meininger, {Rik D.} and Musser, {Marshall R.}",
note = "Funding Information: Research was sponsored by the Army Research Laboratory and was accomplished under Cooperative Agreement Number W911NF-19-2-0131. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Laboratory or the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes not withstanding any copyright notation herein. Publisher Copyright: Copyright {\textcopyright} 2020 ASME.; ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition, GT 2020 ; Conference date: 21-09-2020 Through 25-09-2020",
year = "2020",
doi = "10.1115/GT2020-15661",
language = "English (US)",
series = "Proceedings of the ASME Turbo Expo",
publisher = "American Society of Mechanical Engineers (ASME)",
booktitle = "Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Microturbines, Turbochargers, and Small Turbomachines",
}