Ein Beitrag zur schwingungssicheren Auslegung von radialen Turbomaschinen mit Fokus auf Mistuning und Dämpfung
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Beschreibung
Radial turbine and compressor wheels are significant components of modern internal combustion engines concerning economy, efficiency and, in particular, environmental compatibility. Environmentally relevant aspects influence the development of combustion engines and thus drive the development of exhaust gas charging. In general, this will require particularly high-pressure ratios, which lead to a highly loaded structure.
The high aerodynamic load requires filigree blade geometries. Thinner blades combined with low mechanical damping due to the integral design make the safety design of turbomachinery regarding vibration more difficult. The smallest imperfections, which already occur during production, dominate the dynamic behavior of real components. Deviations from the original design are known as mistuning. The mostly random detuning reduces the operational lifetime of the components, which are permanently highly stressed by centrifugal force, flow deflection, transient pressure fluctuations as well as temperature gradients.
This paper dedicates the description of the structural behavior of radial impellers. The focus of the work is on the description of the MAN TCR 18 radial turbine. Also, the findings of this impeller are compared to other radial impellers. By measurement data, numerical calculation models and simulation results, it is finally possible to provide a guideline for the vibration-proof design of radial turbomachinery with a focus on mistuning and damping.
Autor*in
Robby Weber
Themen in »Ein Beitrag zur schwingungssicheren Auslegung von radialen Turbomaschinen mit Fokus auf Mistuning und Dämpfung«
Aerodynamik Dämpfung MAN TCR 18 Mistuning Radiale Turbinen- und Verdichterräder Radialturbine Schaufelgeometrie Schaufelverstimmung Schwingungssicherheit Strukturverhalten radialer Laufräder Verstimmung dynamisches Verhalten radiale Turbomaschinen schwingungssichere Auslegung