base drag

base drag

[′bās ‚drag]
(fluid mechanics)
Drag owing to a base pressure lower than the ambient pressure; it is a part of the pressure drag.
References in periodicals archive ?
This project will explore the potential for novel base drag reduction technologies for cars.
and Le Good, G., "The Effect of Backlight Aspect Ratio on Vortex and Base Drag for a Simple Car-Like Shape," SAE Technical Paper 2008-01-0737, 2008, doi: 10.4271/2008-01-0737.
Changing the frontal edge to 0.135 m, however, drastically changes the magnitude and the relative contributions of the drag coefficient as can be seen in Figure 9: the frontal drag increased due to flow separation and loss in suction at the edges and a slightly lower base drag contribution resulting in a drag coefficient of 0.421.
At this point you still have two to four pounds of base drag, allowing the permit to escape from predators when you release your two fingers from touching the spool.
Tanner [22] studied methods for reducing base drag in flatback airfoils using different trailing edge forms including 2D and 3D devices.
"A Method for Reducing Base Drag of Wings with Blunt Trailing Edge".
It was denoted that at the tail of the model, the faintish separate had already appeared, so the base drag became increased.
Base drag at the tail results from the bullet's wake; a tapered heel or boattail bullet minimizes base drag but is of little practical advantage for hunting inside 300 yards.
For both cars the rear wheels make a small contribution to the drag rise at yaw, but the largest change in drag due to yaw occurs at the upper part of the separated base flow Kawamata et al., [13], have suggested that the drag rise with yaw is entirely due to the increase in base drag. While this is true for the squareback car, the fastback data shows that there is a small contribution to the drag rise from the backlight.
Typical passive methods such as side tapering [4,5], roof tapering [4,6, 7, 8, 9], roughness strips [10] and underbody tapering [11,12] have all been shown to result in base drag reductions.
The decrease in the coefficient of base drag [DELTA][C.sub.Db] can be calculated using the results and formula in Figure 11.
Summary: TEHRAN (FNA)- US government officials began contacting attorneys of Guantanamo Bay inmates who are being force-fed as the hunger strike on the prison base drags past the two-month mark.