In this paper the effect of different spacings between propeller and rudder bulb and bulb sizes on propeller open water efficiency are investigated with the tests on combined sets of a series of propeller models with four geosim rudder bulbs.

Calculation and analysis of the open water performance of propeller by CFD software Fluent;

In order to predict propeller open water performance quickly and obtain the data of specified types and location precisely according to the requirements,the FLUENT software was applied to simulate the open water experiment of propeller.

Far-Infrared, microwave, and combination of microwave and other drying equipments were applied as heating source media in the natural rubber drying process, and the effect of drying technique and technical conditions on the dehydration efficiency, yield, quality, and operating costs were fully investigated.

A study of the temperature difference measurement for the pump efficiency online monitoring system;

The results show that available power and power input of water pump continuously decline with motor frequency reducing,and pump efficiency also decrease at the same time.