TY - GEN
T1 - Effect of nose shape on separation bubble and surface pressure on a cylinder in axial flow
AU - Sun, Q.
AU - Alam, Md Mahbub
AU - Wong, C. W.
AU - Zhou, Y.
N1 - Publisher Copyright:
© Springer-Verlag Berlin Heidelberg 2016.
PY - 2016
Y1 - 2016
N2 - The flow characteristics is experimentally studied over the leading edge of a circular cylinder with blunt, conical, and hemispherical nose shapes, for a range of Reynolds number ReD = 2.5 × 103− 4.2 × 104. While mean and fluctuating pressure (Cp, Cp′) around the leading edge are measured with a pressure transducer, PIV and flow-visualization experiments are performed to assimilate how an increase in ReD influences the shear layer reattachment length xR, shear layer transition length xTr, and bubble width W. The results reveal that xR,xTr, and W all shrinking significantly with ReD up to ReD =104. Their shrinkage is however inconsequential for ReD >104. At a given ReD, when the nose changes as blunt, conical and hemispherical, xR and W shorten, but xTr enlarges. Following the separation bubble size, Cp and Cp′ in the bubble are highly sensitive to ReD for ReD <104, but less for ReD >104.
AB - The flow characteristics is experimentally studied over the leading edge of a circular cylinder with blunt, conical, and hemispherical nose shapes, for a range of Reynolds number ReD = 2.5 × 103− 4.2 × 104. While mean and fluctuating pressure (Cp, Cp′) around the leading edge are measured with a pressure transducer, PIV and flow-visualization experiments are performed to assimilate how an increase in ReD influences the shear layer reattachment length xR, shear layer transition length xTr, and bubble width W. The results reveal that xR,xTr, and W all shrinking significantly with ReD up to ReD =104. Their shrinkage is however inconsequential for ReD >104. At a given ReD, when the nose changes as blunt, conical and hemispherical, xR and W shorten, but xTr enlarges. Following the separation bubble size, Cp and Cp′ in the bubble are highly sensitive to ReD for ReD <104, but less for ReD >104.
KW - Axial flow
KW - Cylinder
KW - Fluctuating pressure
KW - Separation bubble
UR - https://www.scopus.com/pages/publications/85019754332
U2 - 10.1007/978-3-662-48868-3_61
DO - 10.1007/978-3-662-48868-3_61
M3 - 会议稿件
AN - SCOPUS:85019754332
SN - 9783662488669
T3 - Lecture Notes in Mechanical Engineering
SP - 383
EP - 388
BT - Fluid-Structure-Sound Interactions and Control - Proceedings of the 3rd Symposium on Fluid-Structure-Sound Interactions and Control
A2 - Zhou, Yu
A2 - Lucey , A.D.
A2 - Liu, Yang
A2 - Huang, Lixi
PB - Springer Heidelberg
T2 - 3rd Symposium on Fluid-Structure-Sound Interactions and Control,FSSIC 2015
Y2 - 5 July 2017 through 9 July 2017
ER -