Utilizing the L-PSJA for controlling cylindrical wake flow

Abstract

Purpose – The cylindrical wake flow is an important part of many engineering applications, including wake turbulence, acoustic noise, and lift/drag forces on bodies. The suppression of von Kármán vortex street (VKS) is an important goal for flow control devices. The paper aims to discuss these issues. Design/methodology/approach – The linear plasma synthetic jet actuator (L-PSJA) is utilized as a flow control device to suppress the VKS formation. Different configurations of the device is studied numerically. Findings – Of the 12 configurations that were investigated, five configurations were able to suppress the formation of the VKS. Originality/value – For the first time, the L-PSJA has been shown (through numerical simulations) to be able to suppress VKS.

Effect of rounded corners on two degree of freedom naturally oscillating square cylinder

“…Several reviews discussing the VIV problem can be found in review articles (Bearman, 1984;Sarpkaya, 2004;Williamson and Govardhan, 2004). Experimental and numerical studies of the flow around a stationary and forced oscillating circular and square sections to control vortex shedding have been the center of various investigations over many years (Ozgoren, 2006;Mendez and Velazquez, 2007;Sahu and Patnaik, 2011;Singha and Sinhamahapatra, 2011;Prakash Singh et al, 2013;Skote and Ibrahim, 2016).…”