Experimental measurement of hydroacoustic noise in large scale testing facilities

这个项目旨在展示对部分淹没的钝体，如船头的球茎状钝体的更深层次的物理理解。为了实现这一目标，确定了一套目标：对水声测量和球头上方的水动力特性进行文献综述，以确定其新颖性；通过图像源和模态法对Boldrewood拖曳水箱的声学特性进行数值模拟。通过实验测量Boldrewood拖曳水舱的声学特性，以进行仿真验证。利用模拟和实验测量的知识，开发了一种去除水声测量中液舱壁面的影响的方法。从而创造了自由电场条件。开发了一种通过测量部分淹没钝体表面的非定常压力来隔离模型船球头相关阻力分量的方法。此外，还将进行声压和波高测量。

This project aims to show a deeper understanding of the ow physics over partiallysubmerged bluff bodies, such as the bulbous bow of a ship. To achieve this aim, a set of objectives are defined:Undertake a literature review of underwater acoustic measurements and the hydrodynamicows over a bulbous bow, to identify noveltyTo numerically simulate the acoustic properties of the Boldrewood towing tank, throughImage source and Modal methods. Enabling a picture of the tanks acoustic properties tobe built up.To experimentally measure the acoustic properties of the Boldrewood towing tank, forsimulation validation.To develop a methodology of removing the e ects of tank walls on underwater acousticmeasurements, using knowledge from the simulations and experimental measurements.Thus creating free eld conditionsTo Develop a methodology of isolating the bulbous bow related drag components of amodel scale ship, by measuring unsteady pressure on the surface of partially submergedbluff bodies. In addition acoustic pressure and wave height measurements will be taken.