TY - JOUR
TI - Properties of the flow around two rotating circular cylinders in side-by-side arrangement with different rotation types
AU - Tu Cheng-Xu
AU - Bao Fu-Bin
AU - Huang Long
JN - Thermal Science
PY - 2014
VL - 18
IS - 5
SP - 1487
EP - 1492
PT - Article
AB - The field characteristics of two side-by-side rotating circular cylinders in  a cross-flow is investigated under different rotation types, at T/D =  1.11,1.6, and 3, respectively (T is the center spacing between the cylinders,  and D is the cylinder diameter). A similar flow pattern which is the most  efficient to narrow the lowpressure area is identified for rotation type A,  independent of T/D ratio, and two typical flow patterns are found under  different spacings for rotation type B and type C, respectively. It is  confirmed that there is an optimal rotational speed of 1.7-2, under rotation  type A to attenuate the vortices, velocity drop, and turbulence intensity  tremendously. As rotational speed increases to the optimal value, both the  velocity drop and turbulence intensity decrease and their distributions are  smooth. The results indicate that the shear layers which are accelerated  following the free-stream direction would have significant influence on the  flow modification, and different rotation types actually arrange these shear  layers in diverse ways to change the flow pattern. Pitch ratio is capable to  transform the gap flow, which is usually including the shear layers referred,  thus this parameter can modify the wake of the two cylinders at different  rotation types.