Comparison of Performance Test Results to CFD and Structural Models of Non-Contacting Finger Seals

Proctor, Margaret P ; Kuczmarski, Maria A ; Johnston, James C ; Stalker, Amy R

关键词: COMPUTATIONAL FLUID DYNAMICS;    PRESSURE DISTRIBUTION;    SEALS (STOPPERS);    PERFORMANCE TESTS;   

RP-ID  :  GRC-E-DAA-TN56581,E-19521

学科分类：力学，机械学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Performance tests of non-contacting finger seal designs were conducted at 300, 700, 922 K (70, 800 and 1200 F) at pressure differentials up to 517 kPa (75 psid) and surface speeds up to 366 m/s (1200 ft/s). Room temperature, static analysis of the seal was performed. A simplified CFD model was developed to examine pressure loads within the seal. Results from the CFD model were used as input to a finite element analysis model of a six-finger segment of the non-contacting finger seal. Examination of predicted deflections of individual components of the seal gives insight into the seal behavior. Wear patterns from testing verify the pattern of radial deflection. The models are used to predict maximum pressure differential capability of the seal and compared to experimental results. The CFD model slightly under-predicts the measured leakage flow factor, but has the same trend as the measured flow factor versus pressure differential.