高压燃气涡轮径向内冷叶片气热耦合的数值分析
Conjugate heat transfer analysis of a high pressure turbine vane with radial internal cooling passages
-
摘要: 采用气热耦合方法对采用径向内冷方式的MarkⅡ型跨声速高压燃气涡轮金属导叶进行数值模拟,通过分析叶片通道内的传热和流动过程发现叶片表面附面层内流动非常复杂,包含层流流动、转捩和湍流流动状态,所以只有使用转捩模型计算的叶片附面层内流动与实际情况相符,叶片壁面温度和换热系数分布与实验结果吻合的较好,使用其他湍流模型由于不能准确描述附面层内流动而使得计算结果误差相对较大,但是所有的湍流模型都能很好的模拟附面层以外流动.Abstract: In order to accurately predict aerodynamics and heat transfer between external hot gas and internal cooling passages as well as conduction within metal blade,numerical analysis using conjugate heat transfer methodology for the MarkIItransonic turbine guide vane,which was cooled internally by air flowing through 10 radial round pipes,was carried out.The results show that the flow inside boundary layer is very complex,which includes laminar flow,transition process and turbulent flow.The prediction with M-L(Menter and Langtry) transition model provides the closest agreement with the actual flow conditions inside boundary layer,and the distributions of vane temperature and heat transfer coefficient predicted by this model agree well with the measured experimental data whereas the results with other turbulence models over-predict.However,all turbulence models can well predict aerodynamics of gas outside boundary layer.
-
[1] Han J C,Dutta S.Ekkad S.Gas turbine heat transfer and cooling technology[M].London:Taylor & Francis,2000. [2] Dunn M G.Convective heat transfer and aerodynamics in axial flow turbines[J].ASME Journal of Turbo-machinery,2001,123:637-686. [3] Hylton LD,Milhec M S,Turner E R,et al.Analytical and experimental evaluation of the heat transfer distribution over the surface of turbine vanes[R].NASA-CR-168015,1983. [4] York W D,Leylek J H.Three-dimensional conjugate heat transfer simulation of an internally-cooled gas turbine vane[R].ASME Paper GT2003-38551. [5] Zeechi S,Arcangeli L,Facchini B.Features of a cooling system simulation tool used in industrial preliminary design stage[R].ASME Paper GT2004-53547. [6] Facchini B,Magi A,Greco A S D.Conjugate heat transfer simulation of a radially cooled gas turbine vane[R].ASME Paper GT2004-54213. [7] Jiang Luo,Razinsky E H.Conjugate heat transfer analysis of a cooled turbine vane using the V2F turbulence model[R].ASME Paper GT2006-91109. [8] Allegheny Ludlnm Corporation Company.Stainless steel types 309 and types 310[S/OL].Allegheny Ludlum Corporation Company,2002.http://www.alleghenyludlum.com/ludlum/Documents [9] Menter F R,Langtry R B,Likki S R,et al.A correlation-based transition using local variables part Ⅰ-model formulation[R],ASME Paper 2004-GT-53452. [10] 曹玉璋.航空发动机传热学[M].北京:北京航空航天大学出版社,2005. [11] Steelant J,Dick E.Modeling of laminar-turbulent transitional for high freestream turbulence[J].Journal of Fluids Engineering,2001,123:22-30. [12] Langtry R B,Menter F R,Likki S R,et al.A correlation-based transition using local variables Part Ⅱ-test cases and industrial application[R].ASME Paper 2004-GT-53454. [13] 章梓雄,董曾南.粘型流体力学[M].北京:清华大学出版社,1998. -
点击查看大图
计量
- 文章访问数: 1601
- HTML浏览量: 5
- PDF量: 461
- 被引次数: 0
下载: