入口旋流对旋转篦齿封严特性的影响研究

推进技术 ›› 2019, Vol. 40 ›› Issue (5): 1093-1098.

入口旋流对旋转篦齿封严特性的影响研究

梁义强,吕艳丽,沈毅,柴军生

中国航发沈阳发动机研究所，辽宁沈阳 110015,中国航发沈阳发动机研究所，辽宁沈阳 110015,中国航发沈阳发动机研究所，辽宁沈阳 110015,中国航发沈阳发动机研究所，辽宁沈阳 110015

发布日期:2021-08-15

Study for Effects of Inlet Swirl on Flow Characteristic of Rotating Labyrinth Sealing

AECC Shenyang Engine Institute，Shenyang 110015，China,AECC Shenyang Engine Institute，Shenyang 110015，China,AECC Shenyang Engine Institute，Shenyang 110015，China and AECC Shenyang Engine Institute，Shenyang 110015，China

Published:2021-08-15

摘要/Abstract

摘要： 旋转因素对篦齿的封严特性具有重要的影响，数值研究了具有不同旋流比的入口气流对旋转直篦齿泄漏特性和风阻特性的影响。通过与试验数据对比，进行了湍流模型的选取和验证。在不同压比工况下，获得了不同入口气流旋流比对篦齿的泄漏特性、出口旋流和风阻温升的影响。结果表明:入口旋流比对泄漏系数影响较大，旋流比增加泄漏系数降低；不同入口旋流比对出口旋流的影响不同，甚至影响趋势相反；不同入口旋流条件下，风阻温升均随压比增大而减小；当压比大于1.3时，入口旋流比越大，风阻温升越小；当压比小于1.3时，风阻温升随入口旋流比增大而增高。最后，引入“有效总压”参数，它能够更准确指导分析入口旋流对篦齿泄漏流量影响。

关键词: 篦齿封严；流量系数；风阻温升；旋转比

Abstract: The swirl is one of important factors on the performances of a labyrinth sealing. Its effects on discharge and windage performance of a straight-through labyrinth were numerically studied in cases of various inlet flow states with different swirl ratios. Based on the experimental data， turbulence model was verified. At various pressure ratios， discharge characteristics， windage heating characteristics， and outlet swirl ratios for different inlet swirls were studied closely. Results indicated that the inlet swirl has obvious effect on the discharge. With the increase of inlet swirl the discharge coefficient falls. The presence of inlet swirl results in various even opposite influence on outlet swirl which depends on its number magnitude. The windage temperature rise all decreases when the pressure ratio rises at different inlet swirl ratios. However， it shows opposite trend for different pressure ratio level. Specifically， when pressure ratio is less than 1.3， the windage rise is high for a high inlet swirl ratio; but when pressure ratio is over 1.3， the windage rise falls with the increase of inlet swirl. Finally， an effective total pressure is proposed to help analyze the effects of inlet swirl on sealing discharge.

Key words: Labyrinth sealing；Discharge coefficient；Windage rise；Swirl ratio

梁义强,吕艳丽,沈毅,柴军生. 入口旋流对旋转篦齿封严特性的影响研究[J]. 推进技术, 2019, 40(5): 1093-1098.

LIANG Yi-qiang,LYU Yan-li,SHEN Yi,CHAI Jun-sheng. Study for Effects of Inlet Swirl on Flow Characteristic of Rotating Labyrinth Sealing[J]. Journal of Propulsion Technology, 2019, 40(5): 1093-1098.

参考文献

[1] Steinetz B M, Hendricks R C, Munson J. Advanced Seal Technology Role in Meeting Next Generation Turbine Engine Goals[R]. National Aeronautics and Space Administration, Lewis Research Center, 1998.
[2] 航空发动机设计手册总编委会. 航空发动机手册(12卷)传动及润滑系统[M]. 北京:航空工业出版社, 2002.
[3] Martin H M. Labyrinth Packings[J]. Engineering, 1980, (1): 35-36.
[4] 纪国剑. 航空发动机典型篦齿封严泄漏特性的数值和实验研究[D]. 南京:南京航空航天大学, 2008.
[5] 吴丁毅. 直通式篦齿封严特性的实验研究[J]. 推进技术, 1997, 18(3): 79-97. (WU Ding-yi. An Experimental Investigation on Seal Character of Straight-Through Labrinthe[J]. Journal of Propulsion Technology, 1997, 18(3): 79-97.)
[6] 王锁芳. 转静态封严篦齿流场的数值分析和封严特性的试验[J]. 航空动力学报, 2005, 20(3):444-449.
[7] Alexiou A, Mathioudakis K. Secondary Air System Component Modeling for Engine Performance Simulations[J]. Journal of Engineering for Gas Turbines and Power, 2009, 131(3).
[8] 纪国剑, 吉洪湖, 曹广州. 旋转对小间隙篦齿-蜂窝结构封严特性的影响[J]. 南京航空航天大学学报, 2008, 40(2): 142-145.
[9] 王代军, 苏云亮, 罗翔. 旋转状态下篦齿流量特性试验研究[J]. 燃气涡轮试验与研究, 2007, 20(2):41-44.
[10] 王鹏飞, 刘玉芳, 郭文, 等. 高转速对直通型篦齿封严特性影响的试验研究[J]. 燃气涡轮试验与研究, 2007, 20(2): 45-48
[11] Waschka W, Scherer T, Kim S, et al. Study of Heat Transfer and Leakage in High Rotating Stepped Labyrinth Seals[C]. Hawaii: The 4th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery(ISROMAC-4), 1992: 326-334.
[12] 刘高文, 孔晓治, 陈凯, 等. 转动和旋流对压气机级间封严影响的数值研究[J]. 推进技术, 2014, 35(12): 1687-1693. (LIU Gao-wen, KONG Xiao-zhi, CHEN Kai, et al. Numerical Study for Effects of Rotation and Swirl on Labyrinth Sealing in a Compressor Stator Well[J]. Journal of Propulsion Technology, 2014, 35(12): 1687-1693.)
[13] Waschka W, Wittig S, Kim S. Influence of High Rotational Speeds on the Heat Transfer and Discharge Coefficients in Labyrinth Seals[J]. Journal of Turbomachinery, 1990, 114(2): 462-468.
[14] Denecke J, Dullenkopf K, Wittig S, et al. Experimental Investigation of the Total Temperature Increase and Swirl Development in Rotating Labyrinth Seals[R]. ASME 2005-GT-68677.
[15] Millward J, Edwards M. Windage Heating of Air Passing Through Labyrinth Seals[J]. ASME Journal of Turbomachinery, 1996, 118(3): 414-419.
[16] 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.　　　　　　　　　　　　　　收稿日期:2018-06-16；修订日期:2018-08-18。通讯作者:梁义强,硕士,工程师,研究领域为航空发动机空气系统及热管理系统。E-mail: 979891139@qq.com(编辑:李南)