Study on Flow and Total Temperature Increase of Honeycomb Labyrinth Seals

晏鑫; 李军; 宋立明; 丰镇平

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Study on Flow and Total Temperature Increase of Honeycomb Labyrinth Seals

更新时间：2025-12-08

- Study on Flow and Total Temperature Increase of Honeycomb Labyrinth Seals
- Vol. 42, Issue 7, Pages: 823-827+869(2008)
- 作者机构：
  
  西安交通大学叶轮机械研究所,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK262
- Online First：10 July 2008，
  
  Published：2008
- 稿件说明：
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晏鑫, 李军, 宋立明, et al. Study on Flow and Total Temperature Increase of Honeycomb Labyrinth Seals[J]. 2008, 42(7): 823-827+869.
DOI：

晏鑫, 李军, 宋立明, et al. Study on Flow and Total Temperature Increase of Honeycomb Labyrinth Seals[J]. 2008, 42(7): 823-827+869. DOI：

摘要

研究了典型燃气轮机蜂窝面迷宫密封内的流动和总温升特性

并与光滑面迷宫密封进行了比较. 采用标准k-ε紊流模型数值求解了三维Reynolds-Averaged Navier-Stokes(RANS)方程

计算了2种流量、不同转速时蜂窝面和光滑面迷宫密封的内流场以及间隙热系数. 计算得到的蜂窝面和光滑面迷宫密封的间隙热系数与实验数据吻合良好

验证了数值方法的可靠性. 研究结果表明:在相同转速、径向间隙和流量条件下

蜂窝面迷宫密封的总温升高于光滑面迷宫密封

即蜂窝面迷宫密封的间隙热系数高于光滑面迷宫密封

表明蜂窝面的阻尼作用提高了间隙热系数. 对于蜂窝面和光滑面迷宫密封

其总温升和间隙热系数随转速的升高而增大

随流量的增大而减小. 对于蜂窝面迷宫密封

在相同转速条件下

泄漏流量的增大使得子午面上速度增大

但密封内的泄漏流动形态基本相似

光滑面迷宫密封内的泄漏流动形态也具有类似特性.

Abstract

The leakage flow and total temperature increase characteristics of a honeycomb labyrinth seal used in a typical gas turbine were numerically investigated and compared with a smooth labyrinth seal. The Reynolds-Averaged Navier-Stokes(RANS)equations and standard k-ε turbulent model were adopted. The calculation of the leakage flow field and total temperature increase of two kinds of labyrinth seals with honeycomb stator and smooth stator were conducted at two kinds of leakage flow rates and different rotational speeds. The computed windage heating numbers of the honeycomb and smooth labyrinth seals agree well with the experimental data. The results show that the windage heating number of the honeycomb labyrinth seal is higher than that of the smooth one at the same leakage flow rate and rotational speed. The damping characteristics of the honeycomb cell enhance the windage heating number. The windage heating number increases with the increase of rotational speed and decreases with the increase of the leakage flow rate for the honeycomb and smooth labyrinth seals. For both the honeycomb labyrinth seal and smooth labyrinth seal

the increase of the leakage flow rate increases the meridional velocity at the same rotational speed

but the leakage flow fields of different leakage flow rate exhibit the similar flow pattern.

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references

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SPROWL T, CHILDS D. A study of the effects of inlet preswirl on the dynamic coefficients of a straight-bore honeycomb gas damper seal[J]. ASME J Eng Gas Turbines Power, 2007, 129(2): 220-229.

DENECKE J, DULLENKOPF K, WITTIG S, et al. Experimental investigation of the total temperature increase and swirl development in rotating labyrinth seals[C]∥Proceedings of the ASME Turbo Expo 2005.Reno-Tahoe, Nevada,USA: ASME, 2005: 1161-1171.

SCHRAMM V, WILLENBORG K, KIM S, et al. Influence of a honeycomb facing on the flow through a stepped labyrinth seal[J]. Journal of Engineering for Gas Turbines and Power, 2002, 124(1): 140-146.

WILLENBORG K, SCHRAMM V, KIM S, et al. Influence of a honeycomb facing on the heat transfer in a stepped labyrinth seal[J]. Journal of Engineering for Gas Turbines and Power, 2002, 124(1): 133-139.

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MCGREEHAN W, KO S.Power dissipation in smooth and honeycomb labyrinth seals[C/CD]∥Proceedings of the ASME Gas Turbine and Aeroengine Congress and Exposition. Toronto, Canada:ASME, 1989:89-GT-220.

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