| To improve the sealing performance of the interstage labyrinth-honeycomb seal in compressors, focusing on nine main
parameters affecting its leakage characteristics and their commonly used geometric ranges, the influence mechanisms and interactions of
different parameters were numerically analyzed using the orthogonal experimental design method. The results show that the gap and pres?
sure ratio have a significant effect on the sealing characteristics, with leakage increasing almost linearly with the increase of the gap and
pressure ratio. The honeycomb depth and cell diameter, as well as labyrinth fin height and fin pitch, exhibit strong interactions. When the
proportion of the value is appropriate, the space in the honeycomb and tooth cavities can be fully utilized, allowing vortices in the cavities to
fully develop and dissipate energy. There is an optimal value of about -10° for the fin front angle that can make full use of the cavity space.
The fin rear angle should be tilted to the right by 15° to guide the cavity vortex along the fin to impinge against the ingress flow. The order
of importance of parameter variations on leakage characteristics is: seal gap, pressure ratio, honeycomb wall thickness, honeycomb depth,
fin pitch, honeycomb cell diameter, fin rear angle, fin front angle, and fin height. The research results can provide a technical reference for
the performance analysis and structure design of labyrinth-honeycomb seals. |