9.4.1. Type of flow


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Fig. 9.14: Flow and speed development with laminar flow



Fig. 9.15: Image of flow and speed with turbulent flow
Quite apart from internal friction, the type of flow inside the line also affects pressure loss. Air can move in two completely different ways.

Laminar flow

Laminar flow is even-layered flow. The individual molecules of the compressed air move in parallel, adjacently flowing layers. This type of flow has two main properties:
    • low pressure loss.
    • low heat transition.
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<BR>Turbulent flow

Turbulent flow is whirly and uneven. The axially directed flow is surrounded by constantly changing additional movement at all points. The paths of flow all have an effect on each other and form small whirls. This type of flow has two main properties:
    • high pressure loss.
    • high heat transition.