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http://dx.doi.org/10.5293/KFMA.2006.9.3.014

Prediction of Non-Contact-Type Seal Leakage Using CFD  

Ha Tae-Woong (경원대학교 건축설비.기계공학부)
Publication Information
The KSFM Journal of Fluid Machinery / v.9, no.3, 2006 , pp. 14-21 More about this Journal
Abstract
Leakage reduction through annular type seals of turbomachinery is necessary for enhancing their efficiency and the precise prediction method of seal leakage is needed. The analysis based on Bulk-flow concept has been mainly used in predicting seal leakage. However, full Navier-Stokes Equations with turbulent model derived in the seal flow passage have to be solved for improving the prediction of seal leakage. FLUENT 6 which is commercial CFD(Computational Fluid Dynamics) code based on FVM(Finite Volume Method) and SIMPLE algorism has been used to analyze leakage of various non-contact-type seals in this presentation. Comparing with the results of Bulk-flow model analysis and experiment, the result of CFD analysis shows good agreement with that of existing theoretical analysis for the incompressible grooved seal and compressive plain and staggered seal. The CFD analysis also shows improvement on the leakage prediction of the incompressible plain seal and compressive see-through-type labyrinth seal.
Keywords
Leakage; Plain seal; Grooved seal; See-through-type labyrinth seal; Staggered labyrinch seal; Bulk-flow model; CFD; FLUENT;
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  • Reference
1 Iwatsubo, T., and Sheng, B., 1990, 'Evaluation of Dynamic Characteristics of Parallel Grooved Seals by Theory and Experiment,' in Proceedings of the Third IFToMM International Conference on Rotor dynamics, Lyon, France, pp. 313-318
2 Childs, D., 1983, 'Dynamic Analysis of Turbulent Annular Seals Based on Hirs' Lubrication Equation,' Journal of Lubrication Technology, Vol 105, pp. 437-444   DOI
3 Park, S. Y. and Rhode D., 1998, 'CFD Solution Allowing Modeling Improvement to the Bulk Flow Rotordynamic Code of Dr. Childs for Grooved Seals', Texas A&M University, TRC-SEAL-6-98
4 Black, H. F., 1969, 'Effect of Hydraulic Forces in Annular Pressure Seals on the Vibrations of Centrifugal Pump Rotors,' Journal of Engineering Science, Vol II, pp. 206-213
5 Ha, T. W. and Childs, D. W., 1994, 'Annular Honeycomb-stator Turbulent Gas Seal Analysis Using a New Friction - Factor Model Based on Flat Plate Tests', ASME Journal of Tribology, Vol. 116, pp. 352-360   DOI   ScienceOn
6 하태웅, 이안성. 1998, '압축기용 라비린스 시일의 동특성 해석', 한국소음진동공학회지 제8 권 제5호. pp. 849-855
7 Scharrer, J. 1987, 'A Comparison of Experimental and Theoretical Results for Labyrinth Gas Seals,' Ph. D. Dissertation, Texas A&M University
8 Kim, C. H., and Childs, D. W., 1987, 'Analysis for Rotordynamic Coefficients of Helically-Grooved Turbulent Annular Seals', ASME Journal of Tribology, Vol. 109(1), pp. 136-143   DOI
9 Ha, T. W. and Lee, A. S., 2000, 'A Rotordynamic Analysis of Circumfer - entially-Grooved Pump Seals Based on a Three -Control- Volume Theory', KSME International Journal, Vol. 14, No.3, pp. 261-271   과학기술학회마을
10 Childs, D.W., and Scharrer, J.K., 1986, 'An Iwatsubo Based Solution for Labyrinth Seals: A Comparison to Experimental Results,' ASME Trans. Journal of Engineering for Gas Turbines and Power, April Vol. 108, pp. 325-331   DOI
11 Ha, T. W., 'Rotordynarnic Analysis for Stepped - Labyrinth Gas Seals Using Moody's Friction-Factor Model', KSME International Journal, Vol. 15, No.9, pp. 1217-1225, 2001   DOI
12 하태웅, 이안성, 2000, '압축기용 계단식 래버린스 실의 누설 및 동특성해석', 한국소음진동 공학회 10주년 학술대회 논문집, pp. 1084-1089
13 하태웅, 2002, '엇갈린 래버린스 실의 누설량 및 동특성 해석', 윤활학회지, Vol. 18, No. 1, pp. 24-33
14 하태웅, 이용복, 김승종, 김창호, 2004, '스팀 터빈용 조합형 엇갈린 래버린스 실의 누설량 및 동특성 해석', 유체기계저널, 7권, 6호, pp. 45-54
15 Dietzen, F. J. and Nordmann, R., 1986, 'Calculating Rotordynamic Coefficients of Seals by Finite-Difference Techniques, the 4th Workshop on Rotordynamic Instability Problems in High Performance Turbomachinery., pp. 77-98
16 Moore, J., Palazzolo, A. and Na U. J., 1998, 'CFD Modeling for Dynamic Coefficients of Labyrinth Seals and Impeller Leakage Paths', Texas A&M University, TRC-SEAL-2-98
17 Fluent User's Guide Ver. 6.2
18 하태웅, 2001, '편심된 펌프 실의 누설 및 회전체 동역학적 해석', 유체기계저널, 제4권, 제 2호, pp. 15-21
19 Hirs, G. G., 1973, 'A Bulk-Flow Theory for Turbulence in Lubricating Films,' ASME Journal of Lubrication Technology, Vol. 105, pp. 137-146