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romac |
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University of Virginia Rotating Machinery and Controls Laboratory P.O. Box 400746 122 Engineer’s Way Charlottesville, VA 22904 (434)924-3292 (434)982-2246(fax) |
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Rotating Machinery and Controls Laboratory |
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Labyrinth Gas Seal Code
Student: Jie Zhou Advisor: Paul Allaire Project Start Date: Sept. 2000 Funding: ROMAC
Laby4 is a new gas labyrinth seal analysis program under development. It will replace the current code LABY3. LABY3 gives out reasonably good results for cross coupled damping dynamic coefficients, but not so good for principal dynamic coefficients of stiffness and damping. The new key approach is to use three control volumes following a method by Prof. Nordmann from Germany, to better model the fluid stresses, forces and velocity of the fluid filed in the seals. Tascflow, a 3-D computational fluid flow code from AEA, is being used to determine the flow properties, such as the control volume velocity and pressures, as well as suitable boundary conditions to obtain a better flow description for the three control volumes in each industrial labyrinth seal configuration.
At the request of some members, the LABY4 will add the ability to handle labyrintrh seals with variable clearance. The equation sets are under construction. Programming will start once those equations are ready.
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