[PDF] Top 20 Micro Vortex Generators for Boundary Layer Control: Principles and Applications

... the boundary layer control by means of micro vortex generator ...robust boundary layer control strategy for flows with separation in ...successful ... See full document

... Ramp-shaped vortex generators with a height larger than the boundary layer thickness have also been applied for boundary layer control in the supersonic regime 2 ...drag. ... See full document

... Abstract. Improving the aerodynamic performance of an airfoil is one of the primary interests of the Aerodynamicists. Such performance improvement can be achieved using passive or active flow control devices. One ... See full document

... the control devices affect the efficiency of the control, regarding the size of the separated area, the pres- sure loads on the wall and the unsteady properties of the ... See full document

... The control of SWTBLIs is a topic that has been contin- ually addressed in recent decades, and a variety of strate- gies have been explored in order to diminish the detrimental effects of the shock-induced ... See full document

... The vortex generators were tested in a Mach 3 turbulent boundary layer at Re b, of 3,800 (based on S,. Referring to FIG. 10, different types of micro vortex gen- erators of FIG. 7 are [r] ... See full document

... flow control methods have been pro- posed to alleviate the SWTBLI-induced impact on ...recently, micro vortex genera- tors (MVGs) of size typically smaller than the BL thickness have drawn a ... See full document

... on boundary layer flow separation control by a passive method using low profile vortex ...separation control effectiveness as well as device induced vortex characteristics and ... See full document

... This study follows our previous work and all details about the nu- merics and validation of the simulations can be found in Grébert et al. (2016, 2017). The present large eddy simulations were performed using the CharLES ... See full document

... der the control of mVGs. This is consistent with the observations made on Figure 7 and confirms the further downstream location of the separation point in case B. Moreover, the amplitude of this peak is lowered. ... See full document

... the boundary layer thickness close to the device due to the entrainment of high speed flow ...the boundary layer thickness increases away from the centerline indicating significant spanwise ... See full document

... improve boundary-layer characteristics and static pressure recovery downstream of a shock ...the boundary layer have been controlled using ...the boundary-layer thickness behind ... See full document

... Recently, with the increased concern on environment and intensified global energy crisis, the traditional centralized power supply has shown many disadvantages.Meanwhile, the high-efficiency, less-polluting distributed ... See full document

... The function A t ( ) is purposefully left undefined up till now, which gives the freedom to choose A t ( ) to describe many different phenomena. The most obvious choice for A t ( ) is to describe the steady state power ... See full document

... The diverging fringe Doppler velocimeter (dfv), originally proposed by Naqwi and Reynolds (1987) as a shear stress sensor, has been described in detail in Modarress (2000). The sensor projects a set of diverging fringe ... See full document

... Since the fluid in the inner part of the boundary layer is slower, it is more affected by the increasing pressure gradient. For considerate pressure increase, this fluid may even become reversed. When flow ... See full document

... NOTATION a at A AR c Cc CD CL CN C, Axial inflow induction factor Tangential inflow induction factor Swept area of rotor m2 Aspect ratio of rectangular air jet Chord length of aerofoil o[r] ... See full document

... Flow control techniques are broadly categorized into two classes, namely shock control and boundary-layer manip- ...shock control bumps (SCB) (two-dimensional [5,6] or three-dimensional ... See full document

... the boundary layer where the shock waves impact the walls of the inlet and interact with the boundary ...The boundary layer is defined as the region of flow near to the inlet walls in ... See full document

... the vortex generators is also ...winglet generators was shown to improve the heat transfer process in heat exchangers ...shaped vortex generators and rectangular winglet at Reynolds ... See full document