Drop erosion

from Wikipedia, the free encyclopedia
Wear from wet steam on a rotor blade of a steam turbine ( Altbach / Deizisau thermal power station )

As drops erosion or drop impact is called erosive wear by liquid droplets . Drop erosion is microscopic water hammer .

This effect occurs when drops hit a surface at high speed. Although water as a liquid is apparently "soft", the drops have an abrasive , eroding effect due to the incompressibility of the liquid and the high momentum and inertia . This leads to wear and tear on the surface if exposed to permanent effects .

Since high speeds usually occur in technical gas and steam lines and flow machines (local to supersonic ), the drops have a particularly strong effect, since the momentum is very high and since every deflection of the flow has a strong centrifugal separation effect.

Examples:

The undesirable effect of drop erosion is harnessed in waterjet cutting.

literature

  • Herbert Sigloch: Turbo machines . Basics and applications, Carl Hanser Verlag, Munich, ISBN 978-3-446-43242-0 .
  • Karlheinz G. Schmitt-Thomas: Integrated damage analysis . Technology design and the system of failure, 3rd edition, Springer Fachmedien, Wiesbaden 2015, ISBN 978-3-662-46133-4 .

Web links