Safety Analysis of Flow Parameters in a Rotor-Stator Cavity

摘要：

In order to ensure the safety of engine life limited parts according to airworthiness regulations, a numerical method integrating one-way fluid structure interaction and probabilistic risk assessment is developed, by which the variation of flow parameters in a rotor-stator cavity on the safety of gas turbine disks is investigated.The results indicate that the flow parameters affect the probability of fracture of a gas turbine disk since they can change the distribution of stress and temperature of the disk.The failure probability of the disk rises with increasing rotation Reynolds number and Chebyshev number, but descends with increasing inlet Reynolds number.In addition, a sampling based sensitivity analysis with finite difference method is conducted to determine the sensitivities of the safety with respect to the flow parameters.The sensitivity estimates show that the rotation Reynolds number is the dominant variable in safety analysis of a rotor-stator cavity among the flow parameters.

关键词： airworthiness safety analysis engine life limited parts rotor-stator cavity probabilistic risk assessment

作者: ZHANG Gong DING Shuiting

作者单位: Airworthiness Technologies Research Center,Beijing University of Aeronautics and Astronautics,Beijing 100191,China National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics,School of Jet Propulsion,Beijing University of Aeronautics and Astronautics,Beijing 100191,China

会议类型: 国际会议

会议名称: 航空器适航技术与管理国际会议 ISAA 2011

会议地点: 北京

会议语种:英文

页码: 530

在线出版日期: 2011-10-01（万方平台首次上网日期，不代表论文的发表时间）