Tech Notes & Engineering Papers

Describes the complex blade shape necessary to provide uniform flow, the most important requirement of a fan wheel.

Explains the considerable difference between the aerodynamic and structural requirements of a fan hub.

Compares the three common methods for reducing airflow as conditions permit, to reduce power use and lower noise level.

Noise level calculation formulae indicate performance considerations for reducing noise and other means of lowering noise are discussed.

Discussion of the reduction of stress and the avoidance of critical speeds using variable-speed motors.

Get more air out of your air cooler and cooling tower.

The basic definitions and formulas used in fan selection.

Considerations in the design of axial flow fans for high energy and efficiency.

Gives formulas used by Moore to predict noise levels at user-defined locations and for multiple aerial cooler fans.

Gives formulas that can be used to estimate horsepower, PWL and SPL resulting from modulating air flow.