Understanding Blowers: How to Make the Best Use of Blowers and Compressors

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TURCK GmbH

EDL Anlagenbau Gesellschaft mbH

Everest Blower Systems

Dynamic losses occur due to sudden changes in the direction and the magnitude in the path of flow. Avoid Bends and sudden changes in cross-sectional areas to minimise losses. Dynamic losses, apart from the normal frictional losses, result when a fast moving air stream suddenly expands or contracts due to change in the cross sectional area.

Avoid Bends and Sudden Changes in Cross–Sectional Areas

The impact on dynamic loss for sudden contraction is less than sudden expansion. In sudden expansion the flow is separated giving rise to turbulence and an additional pressure drop. Sudden contractions cause acceleration in flow, which tends to prevent flow separation. Use transition pieces of correct angles.

Ideally, the diffuser transition piece should have angle between 8 to 10 degrees, and that of the nozzle transition piece should have 30 to 35 degrees. Dynamic losses caused by changes in flow direction can be significant. If the flow cannot adjust quickly enough to follow a sharp pipe turn, flow separation and turbulence occurs giving rise to additional pressure drop. Keep the ratio of mean radius of the bend to pipe diameter at least 1.5 to 2.

Learn, how dynamic process simulation helps during the Design and Troubleshooting of Compressor Systemsin our whitepaper.

* In close cooperation with a technical team of Everest Group, India.

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