Origination of Gas Hole in Cu Alloy Propeller;

Aluminous air propeller composite anti-corrosion technology;

Cutting tool selection in the NC machining of propeller blade with a constant pitch;

Study on simulated system of boati s propulsion motor and screw propeller s load;

This paper analyzes the mechanism of underwater vehicle′s radiating noise,especially the noise with linear PSD (Power Spectral Density),and predicts the line spectrum′s frequencies of dynamic device and screw propeller respectively.

The results obtained from the simulation testing by double digital signal processing(DSP) system confirm that the DTC system fits for synchronous motor with screw propeller by three level inverter and the system operation performance is perfect.

Fluid-structure coupling kinetic analysis of propellers;

A numerical method is presented for predicting the steady performance of ducted propellers operating in a uniform flow.

The performance prediction of three propellers and a vane wheel shows the results are satisfactory.

This paper posits that the flow at stern will be unusual if designing stern lines without considering of U or V of body lines and exit angle of water lines;random flow around screw will directly make the ship vibrate hard.

But till now, the deflective force of single-screw ship for stopping maneuver haven t been discussed fully, people can t explain the intricate deflective phenomenon.

In screw design,the selecting of operating mode immediately influence the economy and reliability of ship,in order to bring more economic benefit to ship owner,in this paper,the matching of ship,engine and sc rew has been investigated from an angle of reducing energy.

The stress loads and its distribution of the propeller blade were measured for all operation status in the test,the max dynamic stress and the max static stress of the propeller blade surface were obtained,the actual stress distribution and the max stressing position were also defined.