Product Details Supplier Info More products

Glocon has licensed airfoils developed by the National Renewable Energy Laboratory (NREL) to incorporate into its Swifter CTX Series of industrial fan blades for the OEM and replacement market.

The CTX Series will cover a broad range of fan diameters up to 33ft.

Depending on the size and application, the CTX Series fan blades can reduce power consumption for a given flow rate by up to five per cent and potentially more for adverse operating conditions.

This represents a considerable improvement over currently available airfoils in the market.

Design features of the fan airfoils focus on greater lift-to-drag ratios and lower drag relative to current airfoils.

In addition to the airfoil’s lower non-dimensional drag, the higher lift-to-drag ratio will allow lower rotor solidity with an 18 per cent reduction in blade chord for a given flow rate that results in lower dimensional drag.

The CTX Series combines the geometric shapes of the root and tip fan airfoils in comparison to the shape of a less efficient NACA airfoil commonly used on fan blades.

For enhanced performance, a thinner tip airfoil is used over the outer portion of the blade for lower drag, while a thicker root blade airfoil is used in the lower drag root region for structural considerations.

The CTX blade airfoils are designed to achieve extensive laminar flow over the suction surface of the blade in order to achieve low drag.

A key feature of the airfoils, not present with aircraft airfoils, is the transition of the suction surface laminar flow to fully turbulent flow just prior to maximum lift coefficient.

This design feature minimises the effect of airfoil surface contamination on the maximum lift coefficient.

Therefore, the loss of fan performance during unsteady, turbulent, inflow conditions is reduced.

View full profile