Open AccessEffect of Shear Flow on Flow Characteristics of The PTC Cylinder
Author(s) -
Dahai Zhang,
Tianjiao Li,
Feng Lin,
Wenxiu Huang,
Chunning Ji
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/531/1/012063
Subject(s) - reynolds number , mechanics , potential flow around a circular cylinder , turbulence , shear flow , cylinder , shear rate , vorticity , physics , materials science , mathematics , thermodynamics , vortex , geometry , viscosity
In this paper, FLUENT software was used to simulate the flow characteristics of the passive turbulence control (PTC) cylinder in shear flow field. In the range of Reynolds number 3.5×10 4 ⩽Re⩽7.0×10 4 , shear rate (K) and Reynolds number (Re) can affect the dynamic characteristics of the PTC cylinder. The results show that, in shear flow field, the trends of C Drms and C Drms of the PTC cylinder are the same as those in uniform flow field. When the parameter K is constant, C Drms and C Drms decrease with the increase of the parameter Re . When Re is constant, both C Drms and C Drms decrease with the increase of K . When Reynolds number is 3.5×10 4 , the results about the wake shape of the PTC cylinder in the shear flow field show that the characteristics of the incoming flow will influence the pressure distribution to a greater extent and offset the influence of partial randomness to a certain extent. Compared with the randomness of KH instability of shear layer in the symmetric flow field, the difference of pressure distribution on the upper and lower surfaces of a cylinder in the shear flow field makes it easier to excite the periodic vorticity phenomenon.