题目：Overview of recent Aeroacousticsresearch at lSVR
时间：2026年4月26日 10:30-12:00
地点：伟德国际1946 A401会议室
邀请人：杨程 副教授（振动、冲击、噪声研究所）
报告人：Assoc. Prof. Chaitanya Paruchuri（英国南安普顿大学）
Biography
Dr. Chaitanya Paruchuri is currently Head of the Acoustics Group andAssociate Professor at the Institute of Sound and Vibration Research (lSVR)University of Southampton. He is a member of the Rolls-Royce UniversitTechnology Centre in Propulsion Systems Noise and his recent researchinterestsinclude propeller noise, aerofoil noise, and duct acoustics.
报告人：Dr. Sergi Palleja Cabré（英国南安普顿大学）
Biography
Dr. Sergi Palleja Cabré is a Senior Research Fellow at the Institute of Souncand Vibration Research(lSVR),University of Southampton. His researchcombines experimental aeroacoustics and low order analytical modelling.with a focus on understanding and predicting noise from aircraft andpropulsion systems. His earlier work includes experimental and modellingstudies of over the rotor (OTR) acoustic liners and aerofoil noise reductiortechnologies, while more recent research has focused on noise prediction forinstalled propellers in the context of urban air mobility(UAM) vehicles.
Abstract
This talk presents an overview of recent aeroacoustics research carried out at the Institute of Soundand Vibration Research (lSVR), University of Southampton, with a focus on fundamental mechanisms ofaerofoils. The first part of the talk addresses tip leakage noise, one of the least understood noisesources in turbomachinery. Arising from the interaction between tip leakage flow, blade tips, and thecasing boundary layer, this noise source remains difficult to predict and control. Using experimentaland parametric investigations, the study identifies three key non-dimensional parameters governing tipleakage noise: the angle of attack, the ratio of maximum aerofoil thickness to gap size, and the ratio ofgap size to boundary-layer thickness. These parameters are shown to regulate two fluid-dynamicinstabilities-vortex shedding and shear-layer roll-up-which are responsible for the dominant tipleakage noise mechanisms. The second part of the talk focuses on the aeroacoustics oftandem platesin turbulent inflow. This work investigates the hydrodynamic origin of the n-phase inversion observed inthe acoustic radiation from two flat plates arranged in tandem. While classical unsteady aerodynamicspredicts the generation of induced wake vorticity at a plate traling edge to satisfy the unsteady Kuttacondition, this mechanism has remained difficult to isolate experimentally in grid-generated turbulenceThe tandem-plate configuration provides a useful framework for exposing this behaviour.
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