Numerical Simulation Analysis of Finger Seal Wear Performance

Finger seal is a new type of contacting flexible gas seal which can be used in gas turbine. In order to investigate the wear performance of high-temperature alloy finger seal and rotor with wear-resistant coating, single factor and orthogonal tests on the friction and wear behavior between high-temperature alloy GH4169 and GH4169 with chromium carbide coating material were carried out, and a wear model considering the effect of load, speed, and ambient temperature was established based on the test results. A finite element simulation model was presented for the finger seal dynamic motion. Combined with the adaptive meshing strategy and the wear model, the finger seal wear analysis was implemented. And the wear model and simulation method were verified by comparing the pin-on-disk wear orthogonal test with the wear simulation results. Finger seal wear simulation analysis was carried out to investigate the influence of working conditions and structural parameters on the wear performance of finger seal. The results show that the wear volume increase with the increase of the thickness of the finger laminate and the height of the finger foot, and decrease with the increase of the number of finger beams. When the rotational speed, load and differential pressure increase respectively, the wear volume increases. When the temperature increases, the wear volume decreases.