刷式密封二维模型数值计算

Two-dimensional model mathematical simulation of brush seals

1.
School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
2.
The Second Research Institute, Sichuan Jiuzhou Electric Group Limited Company, Mianyang 621000, China

摘要: 应用计入刷丝变形影响的各向异性多孔介质模型,用阻抗力表示刷丝对流动介质的阻碍作用,并将其作为Navier-Stoke方程的源项,以有限体积和SIMPLE算法为基础建立计算模型.通过流场计算,得到刷式密封的压力分布、速度分布以及泄漏量等.并根据计算结果分析结构和工况参数对刷式密封性能的影响.比较分析表明所述方法在刷式密封分析中具有实用价值.
- 刷式密封 /
- 有限体积法 /
- SIMPLE算法 /
- 性能分析
Abstract: The anisotropic porous model covering the bristles bending deflections was used to establish the calculation model.The effect of bristles for the flow media was considered a resistance force,which was added into N-Sequation as a source term.The model was established on the basis of the Finite Volume Method and the SIMPLEmethod.To this effect,the pressure field,velocity vectors distribution and leakage of brush seal were obtained from calculation of flow field.The influences of main parameters,such as: structure and working condition,on the sealing performance of brush seals,were analyzed and compared,showing that this method is suitable for the study of the brush seals.
- brush seal /
- finite volume method /
- SIMPLE method /
- performance analysis

[1]	Lelli D,Chew J W,Cooper P.Combined three-dementional fluid dynamic and mechanical modeling of brush seals[J].Journal of Turbomachinery,2006,128:188-195.
[2]	Turner M T,Chew J W,Long C A.Experiment investigation and modeling of clearance brush seal[J].Journal of Engineering for Gas Turbines and Power,1998,120:573-579.
[3]	Ferguson,J G.Brushes as high performance gas turbine seals[R].ASME Paper 88-GT-182.
[4]	Chew J W,Lapworth B L,Millener P J.Mathematical modeling of brush seals[J].Int.J.Heat and Fluid Flow,1995,16(6):493-500.
[5]	帕坦卡S V.传热与流体流动的数值模拟[M].张政,译.北京:科学出版社,1984.Patankar S V.Numerical heat transfer and fluid flow[M].ZHANG Zheng.Beijing:Science Press,1984.(in Chinese)
[6]	黄其武.刷式密封设计方法与性能研究[D].北京:北京航空航天大学,2007.HUANG Qiwu.Design method and performance of brush seals[D].Beijing:Beijing University of Aeronautics and Astronautics,2007.(in Chinese)
[7]	孙晓萍.刷式密封性能和耐久性试验研究[J].航空发动机,2002(3):37-41.SUN Xiaoping.Experimental investigation of performance and durability of brush seal[J].Aeroengine,2002(3):37-41.(in Chinese)
[8]	李人宪.有限体积法基础[M].北京;国防工业出版社,2005.LI Renxian.The based of finite volume method[M].Beijing:National Defence Industry Press,2005.(in Chinese)