燃气轮机压气机涡量动力学理论及分析方法
Theory and analysis method based on vorticity dynamics for gas turbine compressor
-
摘要: 阐述了压气机涡量动力学理论及分析方法,建立了压气机总性能参数与两个重要的涡量参数(边界涡量流(BVF)和周向涡量)的直接数学物理关系,研究了基于BVF和周向涡量的分析优化方法.将该方法应用于燃气轮机多级轴流压气机中进行涡量动力学分析,从涡量角度指出了改进的方向.结果表明:周向涡量能反映近壁面的高损失区,使周向涡量峰值束缚在近壁区有利于降低端区损失,在通流设计中可通过优化环量分布控制周向涡量分布,算例中基于周向涡量优化可使跨声压气机转子效率提高1.13%;边界涡量流BVF能反映旋涡的壁面根源,通过优化BVF的分布可控制涡量壁面根源,有利于抑制旋涡和流动分离,基于BVF优化可使转子效率提高1.12%.Abstract: Vorticity dynamics theory and analysis method for compressor of gas turbine was described, and the mathematical and physical relations of total performance parameters and two important vorticity parameters was constructed based on vortictity dynamics theory. The analysis and optimization method based on boundary vorticity flux(BVF) and circumferential vorticity(CV) was researched. The multi-stage axial compressor of gas turbine was designed firstly and then analyzed using this theory and method, and the improving way for the designed compressor was found. It is demonstrated that CV can probe the high loss region near solid boundary, and the loss will be controlled if CV peaks can be restricted in the region near solid boundary. The swirl distribution can be optimized to control CV distribution, and in the optimization of the transonic compressor rotor based on CV the peak efficiency is improved by 1.13%. On the other hand, it is shown that BVF can reflect the vorticity source on solid boundary, and the vorticity and flow separation are suppressed through controlling BVF, and the rotor peak efficiency can be increased by 1.12% in the optimization based on BVF.
-
[1] Wu J C.A Theory for aerodynamic forces and moments [R].ONR Contract n0014-75-C-249,1978. [2] Wu J C.Theory for aerodynamic force and moment in viscous flows[J].AIAA Journal,1981,19(4):432-441. [3] Wu J C.Elements of vorticity aerodynamics[M].Beijing:Tsinghua University Press,2005. [4] Wu J Z,Wu J M.Vorticity dynamics on boundaries[J].Advances in Applied Mechanics,1996,32:119-275. [5] Wu J Z,Wu J M.Boundary vorticity dynamic since lighthill's 1963 article[J].Theoretical & Computational Fluid Dynamics,1998,10:459-474. [6] Wu J Z,Ma H Y,Zhou M D.Vorticity and vortex dynamics[M].Berlin:Springer-Verlag,2006. [7] Wu J Z,Roach R L,Lo C F,et al.Aerodynamic diagnostic and design based on boundary vorticity dynamics [R].AIAA-99-3103,1999. [8] 李秋实.基于涡动力学的叶轮机诊断与设计方法初探[R].北京:北京航空航天大学博士后研究工作报告,2002. [9] 李秋实,郭明.基于局部动力学的一个低速压气机诊断与设计[J].自然科学进展,2005,15(2):221-228. LI Qiushi,GUO Ming.Diagnostic and design approach of axial compressor based on local dynamics[J].Progress in Natural Science,2005,15(2):221-228.(in Chinese) [10] GUO Ming,LI Qiushi,HOU Anping,et al.A diagnostic and design approach of axial compressor based on local dynamics [R].ASME Paper GT-2006-91116,2006. [11] 吴宏.高负荷风扇/压气机涡量动力学设计方法及应用研究 [D].北京:北京航空航天大学,2009. WU Hong.Design method for highly loaded fan/compressor based on vorticity dynamics [D].Beijing:Beijing University of Aeronautics and Astronautics,2009.(in Chinese) [12] 吴宏,李秋实,郭明,等.跨声风扇转子的BVF气动优化方法[J].北京航空航天大学学报,2007,33(1):14-17. WU Hong,LI Qiushi,GUO Ming,et al.Aerodynamic optimization method of transonic fan rotor based on BVF[J].Journal of Beijing University of Aeronautics and Astronautics,2007,33(1):14-17.(in Chinese) [13] WU Hong,LI Qiushi,ZHOU Sheng,et al.Vorticity diagnosis in design of highly loaded fan rotor [R].ISJPPE-2006-5003,2006. [14] LI Qiushi,WU Hong,GUO Ming,et al.Vorticity dynamics in axial compressor flow diagnosis and design:PartⅡ methodology and application of boundary vorticity flux[J].Journal of Fluids Engineering,2010,132(1):011102.1-011102.12. [15] Lighthill M J.Introduction:boundary layer theory,in laminar boundary layer[M].Oxford:Oxford University Press,1963:46-113.
点击查看大图
计量
- 文章访问数: 1425
- HTML浏览量: 2
- PDF量: 1055
- 被引次数: 0