篦齿封严风阻温升特性研究

doi:10.7527/S1000-6893.2018.22348

Abstract

Abstract: The heat load caused by windage heating of labyrinth seals plays an important role in the cooling system for the blade of aero-engine turbines. In this paper, windage heating characteristics of labyrinth seals are systematically studied using theoretical analysis, numerical calculation and experimental research. The formula for theoretical calculation of windage heating is analyzed and the experiment bench of windage heating characteristics is designed and built. Based on labyrinth seals, a model for numerical solution of RNG(Re-Normalization Group) k-ε turbulent equation on windage heating is established. The effects of pressure ratio and rotational speed on the characteristics of windage heating are investigated. The results of the theoretical calculation, numerical simulation and experimental test are compared to analyze the flow field characteristics, leakage characteristics, and windage heating characteristics, revealing the mechanism of windage heating characteristics of labyrinth seals. The results show that the structure of high and low teeth weakens the air permeability of the labyrinth seal, enhances the dissipation of kinetic energy, and helps reduce the leakage of labyrinth seals. Under the study conditions of this article, the total temperature rise is relatively small when the rotation speed is lower than 2 000 r/min, the total temperature of airflow increases as the rotation speed increases to 2 000 r/min to 6 000 r/min, where the air temperature could maximally rise by approximately 12.87 K. The increase of pressure ratio enhances the convection heat transfer of airflow, and the temperature rise drops by 7 K as the pressure ratio increases from 1.1 to 1.3 with the rotation speed of 6 000 r/min. The main reason for windage heating is that the airflow absorbs the frictional heat generated by the abrasion between the viscous airflow through the sealing gap and the high-speed rotating rotor, and the faster the rotor rotates, the higher the temperature rises. The investigation on windage heating characteristics of labyrinth seals in this paper provides a theoretical basis for the heat load analysis of the airflow in aero-engines.

Key words: aero-engine labyrinth seals, windage heating, leakage characteristics, theoretical analysis, convective heat transfer

CLC Number:

V233.5

SUN Dan, LU Jiang, LIU Yongquan, ZHAN Peng, XIN Qi. Investigation on windage heating characteristics of labyrinth seals[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(11): 122348-122357.

References

[1] CHUPP R E, HENDRICKS R C, LATTIME S B, et al. Sealing in turbomachinery[J]. Journal of Propulsion and Power, 2006, 22(2): 313-349.
[2] 孙丹, 王猛飞, 艾延廷, 等. 蜂窝密封泄漏特性理论与实验[J]. 航空学报, 2017, 38(4): 277-286. SUN D, WANG M F, AI Y T, et al. Theoretical and experimental study of leakage characteristics of honeycomb seal[J]. Acta Aeronautica et Astronautica Sinica, 2017, 38(4): 277-286 (in Chinese).
[3] 李志刚, 宁霄, 晏鑫, 等. 蜂窝面篦齿封严泄漏特性和鼓风加热特性研究[J]. 工程热物理学报, 2015, 36(6): 1196-1200. LI Z G, NING X, YAN X, et al, Investigation on leakage characteristics and windage heating of honeycomb labyrinth seal[J]. Journal of Engineering Thermophysics, 2015, 36(6): 1196-1200 (in Chinese).
[4] 孙丹, 王双, 艾延廷, 等. 阻旋栅对密封静力与动力特性影响的数值分析与实验研究[J]. 航空学报, 2015, 36(9): 3002-3011. SUN D, WANG S, AI Y T, et al. Numerical and experimental research on performance of swirl brakes for the static and dynamic characteristics of seals[J]. Acta Aeronautica et Astronautica Sinica, 2015, 36(9): 3002-3011 (in Chinese).
[5] 雷昭, 孔晓治, 刘高文, 等. 高转速下台阶篦齿流动特性的实验与计算[J]. 推进技术, 2017, 38(11): 2588-2596. LEI Z, KONG X Z, LIU G W, et al. Experimental and numerical investigations on flow characteristics of stepped labyrinth seal at high rotational speed[J]. Journal of Propulsion Technology, 2017, 38(11): 2588-2596 (in Chinese).
[6] 胡广阳. 航空发动机密封技术应用研究[J]. 航空发动机, 2012, 38(3): 1-4. HU G Y. Application research of seal technologies for aeroengine[J]. Aeroengine, 2012, 38(3): 1-4 (in Chinese).
[7] MCGREEHAN W, KO S. Power dissipation in smooth and honeycomb labyrinth seals: 89-GT-220[R].New York: ASME, 1989.
[8] YAN X, LI J, SONG L, et al. Investigations on the discharge and total temperature increase characteristics of the labyrinth seals with honeycomb and smooth lands[J]. Journal of Turbomachinery, 2009, 131(4): 041009.
[9] 纪国剑, 吉洪湖, 黄云霞, 等. 直通篦齿蜂窝封严结构的风阻特性试验[J]. 航空动力学报, 2011, 26(12): 2655-2660. JI G J, JI H H, HUANG Y X, et al. Experiment investigation of windage heating on straight-through labyrinth seals with honeycomb bush[J]. Journal of Aerospace Power, 2011, 26(12): 2655-2660 (in Chinese).
[10] 纪国剑, 吉洪湖, 黄云霞, 等. 台阶齿蜂窝衬套封严结构风阻特性的研究[J]. 润滑与密封, 2012, 37(4): 43-47. JI G J, JI H H, HUANG Y X, et al. Investigation of windage heating on step labyrinth seals with honeycomb bush[J]. Lubrication Engineering, 2012, 37(4): 43-47 (in Chinese).
[11] 张达, 罗翔, 徐国强, 等. 转静系盘腔转盘风阻温升实验[J]. 航空动力学报, 2015, 30(5): 1047-1056. ZHANG D, LUO X, XU G Q, et al. Windage heating experiment on rotating discincavity of rotor-stator system[J]. Journal of Aerospace Power, 2015, 30(5): 1047-1056 (in Chinese).
[12] DENECKE J, DULLENKOPF K, WITTIG S, et al. Experimental investigation of the total temperature increase and swirl development in rotating labyrinth seals: GT 2005-68677[R].New York: ASME, 2005.
[13] NAYAK K C, DUTTA P. Numerical investigations for leakage and windage heating in straight-through labyrinth seals[J]. Journal of Engineering for Gas Turbines and Power, 2016, 138(1): 545-50.
[14] NAYAK K C, MUSTHAFA T, ANSARI A. The effects of tooth tip wear and its axial displacement in rub-grooves on leakage and windage heating of labyrinth seals with honeycomb lands: AIAA-2007-5736[R]. Reston, VA: AIAA, 2007.
[15] WILLENBORG K, KIM S, WITTIG S. Effects of Reynolds number and pressure ratio on leakage loss and heat transfer in a stepped labyrinth seal[J]. Journal of Turbomachinery, 2001, 123(4): 815-822.
[16] TAO Z, ZHANG D, LUO X, et al. Windage heating in a shrouded rotor-stator system[J]. Journal of Engineering for Gas Turbines and Power, 2014, 136(6): 062602.
[17] LUO X, ZHANG D, TAO Z, et al. Windage measurements in a rotor-stator system with superimposed cooling and rotor-mounted protrusions[J]. Journal of Engineering for Gas Turbines and Power, 2013, 136(4): 042505.
[18] 呼艳丽, 刘玉芳, 王鹏飞. 旋转状态下阶梯齿风阻温升的初步分析[J]. 燃气涡轮试验与研究, 2009, 22(3): 47-49. HU Y L, LIU Y F, WANG P F. Preliminary analysis of the windage temperature rise in rotating labyrinth seals[J]. Journal of Gas Turbine Experiment and Research, 2009, 22(3): 47-49 (in Chinese).
[19] 杨军. 直通型封严篦齿流动特性的试验研究及数值计算[D]. 成都: 电子科技大学, 2009: 68-75. YANG J. Experimental and numerical study on straight-through labyrinth seal flow characteristic[D]. Chengdu: University of Electronic Science and Technology of China, 2009: 68-75 (in Chinese).
[20] 孔晓治, 刘高文, 雷昭, 等. 转速对压气机级间篦齿封严影响的实验[J]. 航空动力学报, 2016, 31(7): 1575-1582. KONG X Z, LIU G W, LEI Z, et al. Experiment on influence of rotational speeds on labyrinth seal in compressor stator well[J]. Journal of Aerospace Power, 2016, 31(7): 1575-1582 (in Chinese).
[21] 孔晓治, 刘高文, 陈凯, 等. 齿位置对压气机级间封严影响的数值研究[J]. 航空动力学报, 2015, 30(12): 2925-2933. KONG X Z, LIU G W, CHEN K, et al. Numerical study on the influences of tooth position in compressor stator well sealing[J]. Journal of Aerospace Power, 2015, 30(12): 2925-2933 (in Chinese).
[22] 王鹏飞, 郭文, 张靖周. 旋转封严篦齿风阻温升的试验研究与数值分析[J]. 航空动力学报, 2013, 28(6): 1402-1408. WANG P F, GUO W, ZHANG J Z. Experimental investigation and numerical analysis of windage heating in rotating labyrinth seal[J]. Journal of Aerospace Power, 2013, 28(6): 1402-1408 (in Chinese).
[23] 王鹏飞, 郭文, 张靖周. 典型阶梯篦齿高转速密封性能试验[J]. 航空动力学报, 2017, 32(12): 3057-3063. WANG P F, GUO W, ZHANG J Z. Experiment on seal characteristics of high rotational speed of stepped labyrinth seals[J]. Journal of Aerospace Power, 2017, 32 (12): 3057-3063 (in Chinese).
[24] 《航空发动机设计手册》总编委会. 航空发动机设计手册: 第12册,传动及润滑系统[M]. 北京: 航空工业出版社, 2002: 305-306. Editorial Committee of Aero-Engine Design Manual. Aero-engine design manual: Volume 12, transmission and lubrication system[M]. Beijing: Aviation Industry Press, 2002: 305-306 (in Chinese).

Investigation on windage heating characteristics of labyrinth seals

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