Gas dynamic valve

Abstract

A flow-management system may comprise a center body impermeable to air. A conical surface of the center body may face forward. A blocking surface of the center body may be coaxial with the conical surface and may comprise an annular recess. An annular ring may be aft of the center body and fluidly coupled with the blocking surface. A tube may encase the center body and annular ring. The annular ring may comprise an air-foil shape to direct a pulse to the blocking surface. The blocking surface may comprise a central peak and a circular ridge separated by the annular recess.

What is claimed is: 
     
         1 . A pulse detonation engine, comprising:
 a tube comprising an intake and an exhaust;   an intake manifold connected to the intake;   a central tube aft of the intake manifold and comprising a detonation zone; and   an exhaust manifold forward of the detonation zone and comprising a split passage that extends radially outward in a forward direction and curves in an aft direction.   
     
     
         2 . The pulse detonation engine of  claim 1 , wherein the intake manifold comprises a nickel-chromium alloy. 
     
     
         3 . The pulse detonation engine of  claim 1 , wherein the exhaust manifold begins radially inward from the intake manifold and curves radially outward from the intake manifold. 
     
     
         4 . The pulse detonation engine of  claim 1 , wherein the intake manifold splits radially outward and towards the exhaust. 
     
     
         5 . The pulse detonation engine of  claim 1 , wherein the exhaust manifold flows into an annular passage around the central tube. 
     
     
         6 . The pulse detonation engine of  claim 5 , wherein the central tube and annular passage join at the exhaust. 
     
     
         7 . The pulse detonation engine of  claim 1 , wherein the exhaust manifold terminates forward of the detonation zone.