The carbon/carbon (C/C) composite finger seal experiment was performed on a high-speed seal tester. The purpose of this paper is to investigate the leakage and wear characteristics of C/C composite finger seal under various operating conditions.,Static, dynamic, endurance and post endurance tests were carried out. For static and performance tests, the pressure differential changed from 0.1 to 0.6 MPa and the rotor speed varied from 1,000 to 9,000 r/min. Two endurance tests were conducted for 4 h, with each mounting two finger seals. The seal leakage was monitored by mass flowmeters, and the wear depth was measured and calculated by using three-dimensional profilometer.,Results showed that the seal leakage increases with pressure differential but decreases with rotor speed. Leakage rate is lower when speed is decelerated than that with the speed stepped up. During a time history, material removal caused by wear has significant influence on leakage data causing higher leakage than the results before endurance test. Particular interest is that the uneven wear characteristic on finger foot bottom was firstly revealed, showing severe wear in foot heel area than that in foot toe.,This study could provide experimental guidance for finger seal designers. Additionally, the uneven wear characteristic of finger foot was firstly revealed, which showed the necessity of further theoretical research on finger seal wear.

中文翻译：

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C/C复合指接密封泄漏磨损特性试验研究

碳/碳（C/C）复合手指密封实验在高速密封测试仪上进行。本文的目的是研究C/C复合指形密封在不同工况下的泄漏和磨损特性。进行了静态、动态、耐久和后耐久试验。对于静态和性能测试，压差从 0.1 到 0.6 MPa 变化，转子速度从 1,000 到 9,000 r/min 变化。进行了 4 小时的两次耐久性测试，每次都安装了两个手指密封件。密封泄漏采用质量流量计监测,磨损深度采用三维轮廓仪测量计算。结果表明密封泄漏随压差增大而随转子转速增大而减小。减速时的泄漏率低于加速时的泄漏率。在时间历程中，磨损引起的材料去除对泄漏数据有显着影响，导致泄漏高于耐久性试验前的结果。特别令人感兴趣的是，首次揭示了手指足底的不均匀磨损特征，足跟部位的磨损比足趾部位的磨损严重。本研究可为手指密封设计者提供实验指导。此外，首次揭示了指足的不均匀磨损特征，表明进一步对手指密封磨损进行理论研究的必要性。特别令人感兴趣的是，首次揭示了手指足底的不均匀磨损特征，足跟部位的磨损比足趾部位的磨损严重。本研究可为手指密封设计者提供实验指导。此外，首次揭示了指足的不均匀磨损特征，表明进一步对手指密封磨损进行理论研究的必要性。特别令人感兴趣的是，首次揭示了手指足底的不均匀磨损特征，足跟部位的磨损比足趾部位的磨损严重。本研究可为手指密封设计者提供实验指导。此外，首次揭示了指足的不均匀磨损特征，表明进一步对手指密封磨损进行理论研究的必要性。