TurbulenzenTorquePulsationen

TurbulenzenTorquePulsationen is a descriptive term used to characterize the coupled occurrence of turbulent flow fluctuations, torque variations, and pulsating pressures in rotating or flow systems. The term does not denote a single physical law but a class of interactions where fluid turbulence drives mechanical load dynamics and periodic or irregular pressure pulses interact with drive trains.

In engineering, the concept is relevant to turbomachinery such as gas turbines, compressors, pumps, wind turbines, and internal combustion engines with pulsatile exhaust or inlet conditions. Turbulence can generate rapidly changing forces on blades and rotors, leading to torque ripple and pressure pulsations that propagate through the shaft and supporting structures, causing vibrations and potential fatigue.

Measurement and analysis typically involve simultaneous sensing of flow velocity fluctuations, pressure pulsations, and shaft torque. Techniques include high-frequency pressure transducers, anemometry, torque transducers, and vibration sensors, with spectral analysis and cross-correlation to identify coupling between turbulent bursts, torque ripple, and pulsations.

Common causes include flow separation and vortex shedding, swirl generated by blade rows, compressor surge, inlet turbulence, pulsating supply, and gear or bearing dynamics. The interaction can be amplified by drivetrain torsional stiffness and structural resonances.

Mitigation strategies focus on design optimization, such as smoothing flow paths, avoiding resonant frequencies, adding damping, installing pulsation dampers, and employing active control or robust structural design. Modeling often combines computational fluid dynamics with rotor dynamics and reduced-order models to predict and mitigate TurbulenzenTorquePulsationen.