Positive effects of installing guide wheels in rotary fans

This article describes how the installation of guide wheels in rotary fans affects the flow of air into and out of the diffuser. In addition to altering the flow profiles and pressure losses, guide wheels help improve the drying capabilities of rotary fans. Potential savings on electricity are pointed out.

1 Introduction

Many off-the-shelf fans now come with guide wheels fitted as standard equipment. What is referred to as guide wheels actually consist of stationary vanes situated downstream of the fan’s impeller. They reduce the swirling motion in the flow of air to permanently improve the fan’s effective performance.

In a brick drying process, not only the pressure losses associated with ventilation are of interest but also, and even more so, how the flow of air affects the wares being dried. A series of measurements were performed at heavy clay plants in order to illuminate how guide wheels in...

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