The wall-pressure fluctuations induced by turbulent boundary layers (TBL) can be an important source of noise and vibration in different applications. These fluctuations yield the trailing-edge noise, dominant source of wind turbine or marine propeller noise, and others. A correct modeling of the generated wall-pressure fluctuations is the first issue in analyzing this phenomenon. The […]

Jet noise is still the main contributor in airplane noise at take-off, which has been shown to induce health problems in the residents near airports that are now embedded in most large cities such as Toronto or Montreal. Engine manufacturers are now considering the Ultra-High Bypass Ratio (UHBR) type engine to further reduce noise. Yet […]

Sound pressure level in aircraft cabin are similar to a noisy work place. One of the most disturbing noise for passengers is related to the engine fan noise during take-off and approach. This noise is mainly tonal (i.e., at specific frequencies) and in the low frequency range (below 500 Hz) – see figure below.   Reducing […]

The proposed project studies the noise sources of airplane high-lift devices (HLD) that are responsible for most of the aircraft noise at approach. The latter in turn creates noise nuisances that create health issues to populations close to large urban airports. Two approaches are followed. A state-of-the art simulation that predicts most of the turbulent […]

Jet noise is still the main contributor in airplane noise at take-off, which has been shown to induce health problems in the residents near airports that are now embedded in most large cities such as Toronto or Montreal. Engine manufacturers are now considering the Ultra-High Bypass Ratio (UHBR) type engine to further reduce noise. Yet […]