Axial Flow Fan Blade Angle

The characteristics for a typical fan are given in fig.

Axial flow fan blade angle. Fan laws set of laws that predict perfor mance changes if one or more parameters are changed from one fan or operating condition to another. Variable pitch axial flow fans are used for vav air conditioning systems. Angle of the rotor blade. In this investigation an attempt is made to find the best rotational velocity and the best angle of attack of a flat blade at a fixed hub to tip ratio for a maximum mass flow rate in an axial fan.

In this paper the performance of axial fan was analyzed and by. Axial flow fans we are a leading manufacturer of axial fans kitchen exhaust axial flow fans inline fans air slide fan co axial fan and industrial kitchen exhaust fan from faridabad india. The pitch angle of the blades are varied through a controller e g a pneumatic actuator with increasing blade angle for increasing flow rates and vice versa for reducing flow rates. The blade angle is adjusted with the help of a hydraulic actuator fixed with the shaft from minimum to maximum position to ensure maximum possible efficiency.

The flow is axial at entry and exit. The inlet and outlet velocities of the air through the blades will be the same for axial fans and different for centrifugal fans v ᵢ and v ₒ. Fig 3 shows the velocity diagram for the air flowing into the fan inlet and out of it outlet. Flow velocity and volume of axial fan are changed by pitch angle frame the number of blade camber angle and chord length.

Axial flow fans 1 0 definition of axial fans an axial flow fan moves air or gas parallel. The following angles are encountered during the analysis. The shape of your blades and the direction they travel will define the performance characteristics of your fan. These laws govern airflow pres sure capability and power required among many other parameters.

Angle made by v with the plane of the machine usually the nozzle angle or the guide blade angle. The fan is designed to produce a pressure difference and hence force to cause a flow through the fan factors which determine the performance of the fan include the number and shape of the blades.