US 5,429,324 AGranted

Split exhaust jet blast deflector fence

OwnerB. Stanley Lynninventor

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Abstract

A jet blast deflector fence comprising two curved corrugated deflecting surfaces separated from each other in a common structural framework that is fastened to a concrete foundation, with the taller front deflecting surface open at the bottom to permit the high speed jet exhaust ground layer component to split off and pass through the opening to impinge upon the shorter rear deflecting surface which deflects that component vertically upward to hug the convex rear surface of the front deflector, while the upper slower moving component of the jet blast is guided upwardly by the concave surface of the front deflecting surface such that the two split layers come together in a substantially vertical direction at the discharge edge of the taller deflecting surface to form a vertical air curtain which aerodynamically increases the effective height of the blast deflector.

A new and improved jet blast deflector fence of the type that is secured to an airport apron to deflect the jet blast from jet aircraft, said fence consisting of a deflector support frame means, a first, forward deflector surface, and a second rear deflector surface, wherein:

(a) said deflector support frame means is comprised of three (3) structural members, a first member comprising a concave curved steel channel fastened at its lower end to the apron by front clip means that is bolted to the apron, a second member comprising an upright post, the upper end of the post being fastened to the first member near the upper end of said first member, the lower end of said post being fastened to the apron by rear clip means that is bolted to the apron, a third member comprising a concave curved steel channel, horizontally spaced to the rear of said first member, fastened at its lower end to the apron by front clip means, the upper end of said third member being fastened to the second member below the upper end of said first member;
(b) said first, forward deflector surface is formed by first corrugated deflector surface means secured to said first member, the first corrugated deflector surface means commencing from a point that is elevated from the apron and continuing to the upper end of said first member;
(c) said second, rear deflector surface is formed by second corrugated deflector surface means secured to said third member, said second corrugated deflector surface means commencing at the lower end of said third member and continuing to the upper end of said third member;
and,
(d) the first, forward deflector surface has a rear convex surface and the second, rear deflector surface has a forward concave surface, the rear convex surface and the forward concave surface combining to define a confined channel, said second, rear deflector surface deflecting higher velocity components of the jet blast upward through the confined channel to create a wall of higher velocity components of the jet blast that is impermeable by lower velocity components of the jet blast that are deflected by the first, forward deflector surface.

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Abstract

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