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Clearance flow-generated transverse forces at the rotors of thermal turbomachinesSelf-excited rotor whirl represents a serious hazard in the operation of turbomachines. The reported investigation has, therefore, the objective to measure the lateral forces acting on the rotor and to determine the characteristic pressure distribution in the rotor clearance area. A description is presented of an approach for calculating the leakage flow in the case of an eccentric rotor position on the basis of empirical loss coefficients. The results are reported of an experimental investigation with a turbine stage, taking into account a variation of the clearance characteristics. The pressure data measured are consistent with the theoretical considerations.
Document ID
19850007871
Document Type
Thesis/Dissertation
Authors
Urlichs, K.
(NASA Headquarters Washington, DC United States)
Date Acquired
September 5, 2013
Publication Date
October 1, 1983
Subject Category
Mechanical Engineering
Report/Patent Number
NASA-TM-77292
NAS 1.15:77292
Funding Number(s)
CONTRACT_GRANT: NASW-3542
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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