篦齿容积效应对盘腔空气系统瞬态特性的影响

doi:10.7527/S1000-6893.2021.24989

Abstract

Abstract: To investigate the transient response of the air system in aero-engine, transient calculation analysis of the air system is carried out considering the volume packing effect of labyrinth seals in a multi-stage sealed disk cavity in this paper. In the research, a one-dimensional transient fluid network calculation method is adopted to explore the volume packing effect of labyrinth seals and the rotating disk cavity, and a corresponding one-dimensional transient mathematical model is established. By iteratively solving the transient network conservation equations, the fluid parameters of air system in the disk cavity responding with time under different boundary conditions are obtained. The results show that due to the interaction between elements, the volume packing effect of the upstream labyrinth seal will increase the fluid parameters response time and promote the temperature overshoot of disk cavity in the flow path downstream. Compared with extreme conditions, the cavity temperature response under transition conditions is more sensitive to the volume packing effect of labyrinth seal. When the disturbance amplitude is 1.3, the temperature response time in the disk cavity increases by 10.6% and the temperature overshoot value increases by 213.7% after considering the volume packing effect of labyrinth seals.

Key words: disk cavity air system, transient calculation, volume packing effect, response time, temperature overshoot

CLC Number:

V231.1

WANG Lei, MAO Junkui, WANG Longfei, PAN Jin, QIU Changbo, YE Dahai, CAI Kexin. Influence of labyrinth seal volume packing effect on transient characteristics of disc cavity air system[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(2): 124989-124989.

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Influence of labyrinth seal volume packing effect on transient characteristics of disc cavity air system

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