| Citation: | XU Wenfeng, LU Wenxin, SUN Dan, et al. Leakage characteristics and dynamic characteristics of tapered hole-pattern damper seal based on arctangent function curve[J]. Journal of Aerospace Power, 2025, 40（2）：20230320 doi: 10.13224/j.cnki.jasp.20230320
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To improve the leakage characteristics of the hole-pattern damper seal and improve the stability of the rotor, based on the arctangent function curve, the leakage and dynamic characteristics solving model of hole-pattern damper seal was established. The unsteady numerical method was applied to study the effects of different seal clearances, pressure ratios, rotational speeds and whirling frequencies on the leakage and dynamic characteristics of each type of orifice-pattern damper seal, and analyze the leakage and dynamic characteristics of damper seals with different sealings. The results showed that the leakage of different forms of orific-pattern damper seals increased with the increase of pressure ratio. The leakage of the equal clearance hole-pattern damper seal increased the most, followed by the leakage of the arctangent function curve clearance hole-pattern damper seal. The leakage of the convergent curve clearance was the smallest, and it was 2.31% smaller than that of the divergent clearance. The increase of rotational speed expanded the leakage of damper seal with different sealing clearance holes. The leakage of the curve clearance was smaller than that of the conical clearance damper seal. The leakage of the convergent clearance was the smallest. The leakage of the convergent clearance was 15.85% smaller than that of the conical clearance. Larger pressure ratio and whirl frequency greater than 120 Hz existed, then smaller cross stiffness, larger direct damping, and stronger stability of the rotor system can be found in the convergence curve clearance. As the rotational speed increased, the convergent clearance produced the largest effective stiffness and effective damping, and the rotor system had stronger stability.
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