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A Three Dimensional Thermofluid Analysis and Simulation of Flow, Temperature and Pressure Patterns in a Passive-Adaptive Compliant Finger Seal
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Minel J. Braun, Ding F. Deng, Hazel M. Pierson, Margaret P. Proctor, Bruce M. Steinetz Department of Mechanical Engineering, University of Akron
Abstract
Finger seals present a compliant seal alternative to brush seals. The fingers’ compliance allows both axial and radial adjustment to rotor excursions without damage to the integrity or performance of the seal. The potential for hydrodynamic lifting and thus non-contacting operational features differentiates them from the brush seals and introduces the prospect of a long lifespan and even performance seal. The work to be presented here concerns the mapping of the pressures temperatures and flow patterns of a repetitive section of a two layer Finger Seal newly proposed design. The assembly contains four high pressure (HP) and four low pressure (LP) fingers arranged axially in a staggered configuration, and subject to an axial pressure drop. The numerical 3-D results presented herein were obtained using customized commercial packages CFD-ACE+. The results were obtained in a parametric fashion were the HP side, and the compressibility are the controlling parameters. The entire study is aimed at generating a reliable database regarding the thermofluid aspects of this type of seal. This information will be later used in conjunction with the dynamic studies planned for a future paper.
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The 10th of International Symposium on Transport Phenomena and Dynamics of Rotating Machinery Honolulu, Hawaii, March 07-11, 2004 Paper ID. 126
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