Why labyrinth seal only operate on 5/s velocity ?

[rQuestionEngineering]

Why labyrinth seal only operate on 5/s velocity ?
what happens velocity is more than 5m/s ?
what happens velocity is under 5m/s ?

Straight Labyrinth Seal Leakage Rate Calculation

Help/Reference for the labyrinth seal leakage rate calculation

docs.codecalculation.com

 

[BEMPE16524]

this speed allows them to achieve a balance between sealing efficiency and wear.
several mechanical engineering resources:

• "Fluid Sealing Technology" by Heinz K Muller and Bernard S. Nau
  This book covers the fundamentals of different sealing mechanisms, including labyrinth seals, and discusses factors affecting seal performance like velocity, pressure, and flow.
• "Mechanical Seal Practice for Improved Performance" by Heinz P. Bloch
  Although focused on mechanical seals, this book touches on principles relevant to labyrinth seals, such as the effects of flow velocity on sealing efficiency and wear.
• Standards from the American Petroleum Institute (API) and American Society of Mechanical Engineers (ASME)
  Standards like API 682 and ASME B73.1