In this paper effect of air temperature, air flow rate, air duct size and distance between air ducts on the performance of mixed flow grain dryer were analyzed And discussed.

Taking a certain engineering as the example, this paper introduces the construction method of air shaft and air duct, probes into the excavation method for the main body of subway station, expounds the concrete construction procedures by using the strengthening-ring holing method.

The straight section of secondary air duct for boiler of 600 MW supercritical unit manufactured by Dongfang Boiler Factory is shorter, at the time the measurement of air flow is being carried out by adopting velocityequalizing tube flowmeter, the required precision can’t be reached.

The design of suppressied noise duct for air-cooled low noise electrical power plant;

Application of CFD to the optimal design of the car air-conditioning duct;

CFD Analysis and Optimization of Automotive Air-conditioning Duct System;

Then,fan and wind duct are designed.

The wind tunnel structure plays an important role in gas flow and workpiece cooling uniformity in vacuum high-pressure gas quenching furnace.

The air flow and heat dissipation behaviors in a single air passage of rotor disc in an eddy current retarder with original structure and attached inline and staggered pin fins structures for forced heat dissipation are comparatively analyzed using standard k-ε double equations and energy equation.