한국유체기계학회 논문집 (The KSFM Journal of Fluid Machinery)
- 제4권2호
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- Pages.15-21
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- 2001
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- 2287-9706(pISSN)
편심된 펌프 실의 누설 및 회전체동역학적 해석
Rotordynamic and Leakage Analysis for Eccentric Annular Seal
초록
Basic equations and their solution procedure we derived for the analysis of an annular pump seal in which the rotor has a large static displacement from the centered position. The Bulk-flow is assumed for a control volume set in the seal clearance and the flow is assumed to be completely turbulent in axial and circumferential direction. Moody's wall-friction-factor formula is used for the calculation of wall shear stresses in the control volume. For the reaction force developed by the seal, linearized zeroth-order and first-order perturbation equations are developed for small motion about an eccentric position. Flow variables are expanded by using Fourier series for the solution procedure. Integration of the resultant first-order pressure distribution along and around the seal defines the 12 elements of rotordynamic coefficients of the eccentric annular pump seal. The results of leakage and rotordynamic coefficients aye presented and compared with the Marquette's experimental results and the San Andres' theoretical analysis.
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