Optimum Design of the Meridian Surface Shape of a Centrifugal Fan Impeller;

Three-Dimensional Numerical Simulation of Centrifugal Fan;

In order to reduce the temperature of bagged soybeans in high -temperature season,we used grain cooling machine in conjunction with centrifugal fan to ventilate the bagged soybeans, so that we can insure the stabilization of the soybeans.

Based on three fault cases of an engine centrifugal ventilator, fault pattern, adverse effect on reliability of grease system and engine are discussed.

The concrete calculating formula of driving force moment is deduced by analyzing the driving moment constitute of radial inlet guide adjuster, which is collocated for large and medium centrifugal ventilators.

An 3-D steady,compressible and second-order upwind scheme SIMPLEC algorithm were used to simulate the flow field of a centrifugal blower.

The experimental results indicated that,under the windward and leeward conditions,the cooling effect of crushed rock revetments with all these four grain-diameters was good and could effectively reduce the temperatures of the underlying soil layers;furthermore,the mean pe.