Combination of carbon, glass and epoxy resin produces a strong replacement for nickel/aluminum/bronze metal, the current propeller standard. Damage-tolerant reinforcing fabric strengthens highly ...

QinetiQ has recently completed sea trials of a new composite propeller in Falmouth Bay, UK. With a 2.9 metre diameter it is the world’s largest propeller. However, despite its immense proportions it ...

Oscar Propulsion Limited and the University of Strathclyde have come up with a way to reduce underwater radiated noise from ship propellers. According to Oscar Propulsion, its patented PressurePores ...

Cavitation poses a major challenge to Navy ships and submarines. The process occurs when water (or any other fluid) is moving very fast over a solid surface. When the pressure in the fluid drops, air ...

We all acknowledge the environmental impact of Underwater Radiated Noise (URN) from ships, and the challenges it poses for shipping companies and shoreside organizations. While noise is produced by ...

High-fidelity simulations demonstrate how the number of blades affects the wakes of rim-driven thrusters.

This paper describes investigations of the dynamics and acoustics of clouds of cavitation bubbles. Recent experimental and computational findings show that the collapse of clouds of cavitating bubbles ...

Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit NAP.edu/10766 to get more information about this ...

Sharrow Marine, the manufacturer of the ground-breaking “ribbon” style of propellers, now aims to provide owners of larger, inboard-powered ships with improved performance. With Australian-based VEEM ...

When vapor bubbles form and collapse in fluids moving swiftly over steel objects such as those inside fuel pumps, they can damage them. Now researchers detail the results of the first detailed ...