Numerical Simulation for Steady Flow Field of CounterRotating Axial Fan
-
摘要: 在任意曲线转动坐标系及重整化群(RNG)方法改进的k-ε两方程湍流模型基础上,提出了"通用进出口边界条件"的给法,并利用改进的强隐式(MSIP)方法进行计算迭代,提高了对多排叶轮机数值模拟的稳定性和准确性.通过对某对旋轴流风机定常全三维流场的计算,并与设计参数和实验性能参数进行对比分析后,验证了在风扇/压气机的设计中,不宜在叶尖区分配最大负荷,这种设计对对旋轴流压缩系统尤其不利.Abstract: To enhance the stability and accurate when calculated the complicated turbomachinery rows, an inlet/outlet condition as called general boundary condition and an advanced strongly implicit iterative method named MSIP were presented. Based on rotational arbitrarily curved coordinate and RNG improved k-ε turbulence model, the three-dimensional calculating for a counter-rotating axial fan indicate that it is not appropriate to allocate the maximum load at the blade tip when make an aerodynamic design for axial fan or compressor, especially for counter-rotating system.
-
Key words:
- fan /
- numerical simulation /
- boundary conditions /
- iteration methods
-
[1] Yakhot V, Orszag S A. Renomalization group analysis of turbulence—basic theroy [J]. Journal of Scientific Computing , 1986, 1(1):3~5. [2]陶文铨. 数值传热学[M]. 西安:西安交通大学出版社,1988. [3]Schneider G E, Zedan M. A modified strongly implicit procedure for the numerical solution of field problems [J]. Numerical Heat Transfer, 1981, 4(1):1~19. [4]Stone H L. Iterative solution of implicit approximations of multidimensional partial differential equations [J]. SIAM Journal of Numerical Analysis, 1968,5(3):530~580. [5]李秋实. 对旋轴流压缩系统的数值模拟与实验研究 . 北京:北京航空航天大学动力系,2000. -
点击查看大图
计量
- 文章访问数: 2602
- HTML全文浏览量: 185
- PDF下载量: 1049
- 被引次数: 0
下载:
