Numerical Study on Characteristics of Flow and Thermal Fields of Tandem Cylinders in Unsteady Flow
This paper numerically simulated variation characteristics of flow and thermal fields of two cylinders in tandem arrangement in the range of the middle Reynolds numbers. The fully implicit forms of continuous equation, unsteady N-S(Navier-Stokes) equations and energy equation were finite-differenced. Then the numerical results demonstrate that as the change of central distance between two cylinders, flow can be divided into three states. First, when the central distance between the two circular cylinders is small, the flow in the region between two cylinders remains steady while the flow in the downstream region of the second cylinder has periodic variation vortex. Second, when the central distance increases a litter bit large, the whole flow region becomes to keep steady. This is an important finding in this study and the reason for this is deeply connected with the distribution of um um. The third is that when the central distance increases larger further, the unsteady flow occurs in the whole wake flow field of both first and second cylinders, and the vortex shedding can be observed.
Transition flow Vortex shedding Compound gird system Two circular cylinders Tandem arrangements
Zhou Zhao Shaodong Zhou Yinnan Yuan Guannan Xi
School of Mechanical Engineering, Nantong University, Nantong, 226019, China
国际会议
4th International Symposium on Heat Transfer and Energy Conservation(第四届传热与节能国际研讨会 ISHTEC2012)
广州
英文
1-5
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）