中心进气旋转盘腔换热特性对无量纲参数的敏感性分析

doi:10.7527/S1000-6893.2019.23017

Abstract

Abstract: The early research method of rotating disk cavity heat transfer characteristics ignores the influence of compressibility and dissipation. To solve this problem, the governing equation describing the rotating disk cavity system is nondimensionalized under the assumptions of fixed geometry, constant physical property, being compressible, and being dissipative. Analysis yields 7 dimensionless criteria in addition to the dimensionless spatial location. The numerical simulation method is used to investigate the sensitivity of the heat transfer characteristics of the central inlet rotating disk cavity. The results show that in some working conditions, the Eckert criterion reflecting the inlet dissipation effect, the Kibitche criterion reflecting the thermal boundary influence of the disk, and the dimensionless thermal conductivity of the solid have the same magnitude of influence on the Nusselt number as the rotating Reynolds criterion. Based on the analyses this paper offers the precautions and engineering suggestions for the application of early rotating disk cavity heat transfer study results in the design of advanced aero-engine rotating disk cavity.

Key words: aero-engine, rotating disk cavity, dimensionless analysis, heat transfer characteristics, sensibility analysis

CLC Number:

V231

DING Shuiting, DENG Changchun, QIU Tian. Sensibility analysis of heat transfer characteristics to dimensionless criterion in central inlet rotating disk cavity[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(12): 123017-123017.

References 23

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Sensibility analysis of heat transfer characteristics to dimensionless criterion in central inlet rotating disk cavity

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