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A de Laval nozzle (or convergent-divergent nozzle, CD nozzle or con-di nozzle) is a tube which is pinched in the middle, with a rapid convergence and gradual divergence. It is used to accelerate a compressible fluid to supersonic speeds in the axial (thrust) direction, by converting the thermal energy of the flow into kinetic energy .
Copper Leader Head at Penn's Quadrangle, Philadelphia 1894 Copper Leader at Shofuso Japanese House and Garden in Philadelphia. The purpose of a leader head is to help transfer excess water from the roof onto downspouts, thus preventing the gutters from overflowing and water washing over the walls, which is a common occurrence in areas susceptible to heavy rain cycles.
Figure 1: A de Laval nozzle, showing approximate flow velocity increasing from green to red in the direction of flow Density flow in a nozzle. A rocket engine nozzle is a propelling nozzle (usually of the de Laval type) used in a rocket engine to expand and accelerate combustion products to high supersonic velocities.
The purpose of a downspout is to allow water from a gutter to reach the ground without dripping or splashing down the building structure. Downspouts are usually vertical and usually extend down to ground level , although may be routed at an angle to avoid architectural features and may discharge onto an intermediate roof.
Watts was the road manager for Pretty Things before joining Pink Floyd as their first experienced road manager. [5] Alongside fellow roadie Alan Styles, [1] he appears on the rear cover of Pink Floyd's 1969 album Ummagumma, [1] shown with the band's van and equipment laid out on a runway at Biggin Hill Airport, with the intention of replicating the "exploded" drawings of military aircraft and ...
The Library, constructed in 1972 out of a redwood water tank, initially to house the books and papers of Alan Watts. [8] Mandala House, a cabin shaped like a lotus flower. It was originally built by Stiles for Elsa Gidlow's sister, then improved and rented to Alan and Jano Watts from 1970 until his death there in 1973. [8]
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