| Citation: | SUN Dan, LIU Wei, JIAO Zhongze, et al. Numerical study on fluid-structure interaction of critical pressure capacity of brush seal[J]. Journal of Aerospace Power, 2023, 38（1）：13-22 doi: 10.13224/j.cnki.jasp.20210404
|
Leakage factor and effective clearance were used as the evaluation indexes of the critical pressure capacity of brush seals. A three-dimensional transient solution model of brush seals was established based on the ALE (arbitrary Lagrange-Euler) method. Three brush seal models with different structures were studied, and the brush wire deformation under different pressure differences was analyzed. The influence of critical pressure capacity on wire deformation was obtained. The results showed that with the increase of the pressure difference between the upstream and downstream, the maximum pressure difference between the leakage factor and the effective clearance was prone to be the critical pressure capacity. The critical pressure capacity of the basic brush seal was about 0.25—0.30 MPa. Compared with the basic brush seal, the critical pressure capacity of the brush seal with the rear damper protection height reduced by 0.5 mm, and that of the brush seal with the axial increase of 5 rows of brush wire increased by 16.7% to 20.0%. The critical pressure capacity of the brush seal can be improved by decreasing the rear damper protection height and increasing the number of axial rows of the brush wire. With the increase of the pressure difference between the upstream and downstream, the maximum axial deformation of the brush increased first. When the pressure difference between the upstream and downstream reached the critical pressure capacity of the brush seal, the gap between the brushes was compressed to the minimum, and the maximum axial deformation of the brush reached the maximum. The research results provide a theoretical basis for the structural design of brush seal.
| [1] |
孙丹,刘宁宁,胡广阳,等. 考虑刷丝变形的刷式密封流场特性与力学特性流固耦合研究[J]. 航空动力学报,2016,31(10): 2544-2553.
SUN Dan,LIU Ningning,HU Guangyang,et al. Fluid-structure investigation on the flow flied and mechanical characteristic in brush seals with bristle deflections[J]. Journal of Aerospace Power,2016,31(10): 2544-2553. (in Chinese)
|
| [2] |
赵欢,焦忠泽,孙丹,等. 多级刷式密封级间压降分配影响因素数值与实验研究[J]. 航空学报,2020,41(10): 79-91.
ZHAO Huan,JIAO Zhongze,SUN Dan,et al. Numerial and experimental research on interstage drop distribution affecting factors of multi-stage brush seals[J]. Acta Aeronautica et Astronautica Sinica,2020,41(10): 79-91. (in Chinese)
|
| [3] |
孙丹,李国勤,艾延廷,等. 基于三维实体建模的刷式密封传热机理数值研究[J]. 航空动力学报,2019,34(8): 1633-1643.
SUN Dan,LI Guoqin,AI Yanting,et al. Numerical study on heat transfer mechanism of brush seal based on three-dimensional solid modeling[J]. Journal of Aerospace Power,2019,34(8): 1633-1643. (in Chinese)
|
| [4] |
DINC S,DEMIROGLU M,TURNQUIST N,et al. Fundamental design issues of brush seals for industrial applications[R]. ASME Paper 2001-0400,2001.
|
| [5] |
SHORT F,BASU P,DATTA A.Advanced brush seal developmnet[R]. AIAA-1996-2907,1996.
|
| [6] |
CHUPP R E,HENDRICKS R C,LATTIME S B. Sealing in turbomachinery[J]. Journal of Propulsion and Power,2006,22(2): 313-349. doi: 10.2514/1.17778
|
| [7] |
CHUPP R E,PRIOR R,LOWENTHAL R. Update on brush seal development for large industrial gas turbines[R]. AIAA-1996-3306,1996.
|
| [8] |
CRUDGINGTON P. Brush seal performance evaluation[R]. AIAA-1998-3172,1998.
|
| [9] |
DINC S,DEMIROGLU M,TURNQUIST N,et al. Fundamental design issues of brush seals for industrial applications[J]. Journal of Turbomachinery,2002,124(2): 293-300. doi: 10.1115/1.1451847
|
| [10] |
TRIVEDI D,ROY B,DEMIROGLU M. Experimental characterization of variable bristle diameter brush seal leakage,stiffness and wear[R]. ASME Paper GT2013-95086,2013.
|
| [11] |
孙晓萍. 刷式密封性能和耐久性试验研究[J]. 航空发动机,2002,28(3): 37-41. doi: 10.3969/j.issn.1672-3147.2002.03.009
SUN Xiaoping. Experimental investigation of performance and durability of brush seal[J]. Aeroengine,2002,28(3): 37-41. (in Chinese) doi: 10.3969/j.issn.1672-3147.2002.03.009
|
| [12] |
孙晓萍,李卫东,刘晓远. 刷式密封设计与试验研究[J]. 航空发动机,2005,31(2): 17-19. doi: 10.3969/j.issn.1672-3147.2005.02.007
SUN Xiaoping,LI Weidong,LIU Xiaoyuan. Design and test of brush seal[J]. Aeroengine,2005,31(2): 17-19. (in Chinese) doi: 10.3969/j.issn.1672-3147.2005.02.007
|
| [13] |
朱宗举. 刷式密封的设计与应用[J]. 燃气轮机技术,2005,18(3): 68-72. doi: 10.3969/j.issn.1009-2889.2005.03.014
ZHU Zhongju. Design and application of brush seal[J]. Gas Turbine Technology,2005,18(3): 68-72. (in Chinese) doi: 10.3969/j.issn.1009-2889.2005.03.014
|
| [14] |
JAYESH M, GARY H. Rotating intershaft brush seal for sealing between rotating shafts: Part Ⅱ experimental data evaluation and modeling of the brush seal leakage flows[R]. AIAA-2007-5733,2007.
|
| [15] |
MEHTA J,HOLLOWAY G,ASKEW J. Innovative rotating intershaft brush seal for sealing between rotating shafts: Part Ⅱ modeling of brush seal leakage flows[R]. AIAA-2006-4752,2006.
|
| [16] |
BASU P,DATTA A,JOHNSON R. Hysteresis and bristle stiffening effects of conventional brush seals[R]. AIAA-1993-1996,1993
|
| [17] |
ADDY E J,HOWE H,FLOWERS J. Preliminary results of silicon carbide brush seal testing at NASA Lewis Research Center[R]. AIAA-1995-2763,1995.
|
| [18] |
CHUPP R E,HOLLE G F,DOWLER C A. Simple leakage flow model for brush seals[R]. AIAA-1991-1913,1991.
|
| [19] |
PUGACHEV A O. Aggregation of experimental and theoretical data for brush seal leakage evaluation[R]. AIAA-2014-3598,2014.
|
| [20] |
张雄,王天舒,刘岩.计算动力学[M].2版.北京:清华大学出版社,2015.
|
| [21] |
孙丹,杜宸宇,刘永泉,等. 基于ALE流固耦合方法的刷式密封刷丝接触变形特性理论与试验研究[J]. 机械工程学报,2020,56(9): 170-180. doi: 10.3901/JME.2020.09.170
SUN Dan,DU Chenyu,LIU Yongquan,et al. Theoretical and experimental investigation on the bristle contact deflections characteristics of brush seals based on ALE fluid-structure interaction method[J]. Journal of Mechanical Engineering,2020,56(9): 170-180. (in Chinese) doi: 10.3901/JME.2020.09.170
|
| [22] |
CARLILE J A,HENDRICKS R C,YODER D A. Brush seal leakage performance with gaseous working fluids at static and low rotor speed conditions[J]. Journal of Engineering for Gas Turbines and Power,1993,115(2): 1-7.
|
| [23] |
邱波,李军. 刷式密封传热特性研究[J]. 西安交通大学学报,2011,45(9): 94-100.
QIU Bo,LI Jun. Investigation on the heat transfer characteristics of brush seals[J]. Journal of Xi’an Jiaotong University,2011,45(9): 94-100. (in Chinese)
|
DownLoad:
