Potential flow in engine valves

Description:

The extensive applicability of the hydrodynamic theory to the problems of engine construction is clearly shown in the following attempt to determine by exact methods the nature of the flow in valves under variously restricted conditions. Observation shows that two principal kinds of flow occur in simple flat-seated valves. For small valve lifts, the flow is along the horizontal wall and is therefore deflected 90 degrees, but for greater valve lifts the flow separates and forms a free stream, whose angle of deflection naturally increases with increasing lift. Both these kinds of flow can, in fact, be theoretically explained.
Creator(s): Eck, Bruno
Creation Date: December 1, 1925
Partner(s):
UNT Libraries Government Documents Department
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Collection(s):
National Advisory Committee for Aeronautics Collection
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Technical Report Archive and Image Library
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Creator (Author):
Eck, Bruno
Potential flow in engine valves
Date(s):
  • Creation: December 1, 1925
Description:

The extensive applicability of the hydrodynamic theory to the problems of engine construction is clearly shown in the following attempt to determine by exact methods the nature of the flow in valves under variously restricted conditions. Observation shows that two principal kinds of flow occur in simple flat-seated valves. For small valve lifts, the flow is along the horizontal wall and is therefore deflected 90 degrees, but for greater valve lifts the flow separates and forms a free stream, whose angle of deflection naturally increases with increasing lift. Both these kinds of flow can, in fact, be theoretically explained.
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Serial Title: NACA Technical Memorandums
Partner:
UNT Libraries Government Documents Department
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Collection:
National Advisory Committee for Aeronautics Collection
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Collection:
Technical Report Archive and Image Library
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Identifier:
Resource Type: Report
Format: Text
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Access: Public
Statement: No Copyright, Unclassified, Unlimited, Publicly available