OpenProp is an open-source code suite that can be used for the design, analysis, and fabrication of optimized propellers and horizontal-axis turbines. The numerical model is based on propeller lifting line theory, which is used in parametric design codes employed by the U.S. Navy as well as commercial designers. OpenProp is written in Matlab M-code, which is widely used in academia and industry...

The presence of broken ice in the flow field around a propeller causes severe blade erosion, shafting, and hull vibration. This study investigates performance ship sailing polar regions under propeller–ice non-contact condition. To this end, we construct test platform for propeller-induced excitation force due to blockage large circulating water channel. hydrodynamic load propeller, cavitation ...

Introduction: Fast Spin Echo (FSE) could suffer from the non-CPMG condition that results in destructive echo interference, unstable echo train and signal cancellation. Diffusion-weighted (DW) PROPELLER [1], an FSE-based sequence, mitigates the non-CPMG issue by XY phase cycling [1] combined with split-blade acquisition [2]. However, XY phase cycling requires refocus flip angle be close to 180° ...

BACKGROUND/AIM Since their introduction in 1991, propeller flaps are increasingly used as a surgical approach to loss of substance. The aim of this study was to evaluate the indications and to verify the outcomes and the complication rates using this reconstructing technique through a literature review. MATERIALS AND METHODS A search on PubMed was performed using "propeller flap", "fasciocuta...

Significant levels of undesired vibration and noise are inherent in transport and combat vehicles, particularly in helicopters and propeller aircraft. Therefore, it is important to investigate techniques that reduce vibration and noise in the cabin to improve habitability, effectiveness, and safety for passengers. In addition, continuous exposure may lead to long-term physiological effects. In ...

With the mandatory requirement for more efficient aircraft due to both economic and environmental purposes, academy industry are exploring new design opportunities including concepts of hybrid-electric fully electric vehicles. Within this framework, distributed propulsion is a key technology future aviation, as it allows installation theoretically indefinite number small motors. The blowing eff...

This paper describes a computational procedure which is being developed for the practical analysis of propeller sheet cavitation and propeller-ship interaction including hull pressure fluctuations. The computational procedure consists of three different, coupled methods: (i) a RANS method for the analysis of the viscous flow around the ship hull and the determination of the velocity field in th...

Human pilots have the extraordinary ability to remotely maneuver small Unmanned Aerial Vehicles (UAVs) far outside the flight envelope of conventional autopilots. Given the tremendous thrustto-weight ratio available on these small machines [1, 2], linear control approaches have recently produced impressive demonstrations that come close to matching this agility for a certain class of aerobatic ...