Affiliation:
1. College of Engineering and Technology, American University of the Middle East, Dasman 15453, Kuwait
Abstract
Abstract
Brush seals are one of the most effective sealing technologies in turbomachinery since they enable contact-type operation for close clearance control. Brush seal bristles must interact under turbine conditions, and the minimum pressure load to initiate proper contact between fibers is called seating load. Seating load evaluation is essential for the durability and stability assessment of bristles since unseated fibers may flutter and cause seal failure. Even with proper seating, brush seal critical modes may still be excited by flow-induced fluctuations or bucket tip excitations. In this study, a finite element-based methodology was developed to determine the seating load and identify the critical modes of brush seals. Under pressure load, brush seal nonlinear contact simulations are followed by frequency-based analysis to determine bristle and seal pack critical modes. To determine the seating load of the brush seal, the change in modal response is examined. In this paper, the modeling methodology, parameter correction procedures, geometric inspection of test seals, correlation of transient analyses with dynamic tip force measurements, operational modes of brush seals and seating load evaluation methods are detailed.
Subject
Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering
Reference21 articles.
1. Evaluation of Brush Seals for Limited-Life Engines;J. Propul. Power,1993
2. Update on Brush Seal Development for Large Industrial Gas Turbines,1996
3. Advanced Brush Seal Development,1996
4. Brush Seal Pack Hysteresis,2002
5. Brush Seal Structural Analyses and Correlation With Tests for Turbine Conditions,2016
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献