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Thermal Engineering by Sukumar Pati, Sadhu Singh

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Chapter 14

Centrifugal Air Compressors

14.1 ❐ INTRODUCTION

A centrifugal compressor is of rotodynamic type in which air flows continuously and steadily through various parts and the rise in pressure is primarily due to the centrifugal action. It is used to supply large quantities of air but at a lower pressure ratio.

14.2 ❐ CONSTRUCTIONAL FEATURES

Essentially, a centrifugal compressor consists of four elements namely, inlet buckets, impeller, diffuser, and casing as shown in Fig. 14.1. The inlet buckets are attached to the shaft and rotate with it, which guide air on the impeller. The impeller consists of a disc on which radial blades are attached. The diffuser surrounds the impeller and provides diverging passages for air flow, thus increasing ...

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