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蜂窝芯格尺寸对蜂窝密封流动特性的影响
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国家自然科学基金项目(51476192)


Influence of Honeycomb Cell Size on Flow Characteristics of Honeycomb Seal
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    摘要:

    采用RNG k-ε两方程紊流模型、Simple算法和结构化网格,利用Fluent软件数值分析不同间隙、压比和转速条件下,蜂窝芯格尺寸对蜂窝密封内泄漏流动的影响。结果表明:蜂窝密封特殊的六边形结构可以将泄漏流分割成许多小涡流,漏汽在蜂窝腔内呈逆时针螺旋式三维紊流运动;芯格尺寸越大,漏汽量越大;同一密封间隙下,随着芯格尺寸的增大,泄漏量增大的趋势在升高;随着压比的增大,蜂窝密封的泄漏量增大,但泄漏量增加的趋势在减小;随着转速的增加,转轴表面形成强烈的气旋效应,有利于阻滞泄漏流动。

    Abstract:

    The influence of honeycomb cell size on leakage flow in honeycomb seal under different conditions of the clearence,the pressure ratio,and the rotational speed was numerically simulated by using the Fluent software,RNG kε twoequation turbulence model,Simple algorithm and structural griddings.The results show that the honeycomb seal with special hexagonal structure can divide the leakage flow into many small vortices,where the threedimensional anticlockwise turbulent spirals can be seen.The greater the honeycomb cell size is,the more the leakage rate becomes.Under the same seal clearance,with the increasing of honeycomb cell size,the increasing gradient of leakage rate is increased.With the increasing of pressure ratio,the leakage rate is increased,but in a reducing gradient.Along with the increasing of rotational speed,the rubgroove labyrinth seal are more likely to form the strong effect of cyclone,which is beneficial to block the leakage flow.

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姜铁骝,曹丽华,付亚辉,李盼,李勇.蜂窝芯格尺寸对蜂窝密封流动特性的影响[J].润滑与密封,2016,41(6):29-34.
JIANG Tieliu, CAO Lihua, FU Yahui, LI Pan, LI Yong. Influence of Honeycomb Cell Size on Flow Characteristics of Honeycomb Seal[J]. Lubrication Engineering,2016,41(6):29-34.

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  • 在线发布日期: 2016-07-07
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