| Citation: | ZHONG Qiaoling, HUANG Yuanfeng, WU Zeyu, et al. Numerical simulation of heat transfer characteristics in rotor-stator cavity with annular gap inlet[J]. Journal of Aerospace Power, 2025, 40（11）：20230793 doi: 10.13224/j.cnki.jasp.20230793
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A low radius annular gap inlet rotor stator system cavity model was established for the low-pressure turbine cavity structure of a small aviation engine. The heat transfer characteristics in the rotor-stator system cavity were explored and the distribution characteristics of convective heat transfer coefficient on the rotor disk surface were obtained. The influences of flow parameters such as cold air flow rate and rotor speed, as well as structural parameters such as the position of the annular inlet gap radius, the distance between the rotor and stator disks and the height of the outlet gap on the convective heat transfer coefficient, were studied. The empirical relation used to solve the average Nusselt number of disks was obtained. The results showed that the convective heat transfer coefficient of the rotor stator system cavity with low radius annular gap intake exhibited a characteristic of “higher in the low radius region and overall radial decrease”. When the flow parameters were the same, changes in the individual parameters of flow and rotation speed also affected the heat transfer characteristics. The increase in flow rate and rotational speed both enhanced the heat transfer inside the disk cavity. The inlet radius and the clearance between the rotor and stator had a significant impact on the heat transfer in the disk cavity, while the change in the outlet clearance had a smaller impact on the heat transfer in the disk cavity.
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