Gas dynamic valve

Patent metadata

Field	Value
Publication number	US-10151271-B2
Application number	US-201514754342-A
Country	US
Kind code	B2
Filing date	Jun 29, 2015
Priority date	Jul 28, 2014
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

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.

First claim

What is claimed is:

1. A flow-management system, comprising:
a center body impermeable to gas;
a conical surface of the center body facing forward;
a blocking surface of the center body coaxial with the conical surface and comprising an annular recess disposed between a central peak and a circular ridge, wherein the circular ridge extends rearward of the central peak; and
an annular ring aft of the center body and fluidly coupled with the blocking surface, wherein the annular ring is symmetrical about a centerline axis, wherein a distance between the centerline axis and a forward edge of the annular ring is smaller than a distance between the centerline axis and an aft edge of the annular ring.

2. The flow-management system of claim 1 , further comprising a tube encasing the center body and annular ring.

3. The flow-management system of claim 1 , wherein the annular ring comprises an air-foil shape to direct a pulse to the blocking surface.

4. The flow-management system of claim 1 , wherein the center body is axially symmetric.

5. The flow-management system of claim 1 , further comprising a strut mounted to the conical surface of the center body.

6. A pulse detonation engine comprising:
a tube;
a center body fixed to the tube;
a conical surface of the center body facing forward;
a blocking surface of the center body coaxial with the conical surface and comprising an annular recess disposed between a central peak and a circular ridge, wherein the circular ridge extends rearward of the central peak, wherein the blocking surface is impermeable to gas;
a duct defined by the conical surface and tube; and
an annular ring aft of the center body comprising an air-foil shape configured to divert a pulse towards the blocking surface, wherein the annular ring is symmetrical about a centerline axis, wherein a distance between the centerline axis and a forward edge of the annular ring is smaller than a distance between the centerline axis and an aft edge of the annular ring.

7. The pulse detonation engine of claim 6 , wherein the air-foil shape of the annular ring is further configured to divert the pulse away from the duct.

8. The pulse detonation engine of claim 6 , wherein the conical surface is impermeable to air.

9. The pulse detonation engine of claim 6 , wherein the center body is axially symmetric.

10. The pulse detonation engine of claim 6 , further comprising:
a first strut connecting the tube and center body; and
a second strut connecting the tube and annular ring.

11. The pulse detonation engine of claim 6 , further comprising a detonation zone in the tube and aft of the annular ring, wherein the pulse originates from the detonation zone.

Assignees

• United Technologies Corp

Inventors

• Hill James D
• Blinn Roger F
• Cuozzo Michael J

Classifications

• F02K7/067 Primary

  having aerodynamic valves · CPC title

• F02C5/10

  the working fluid forming a resonating or oscillating gas column, i.e. the combustion chambers having no positively actuated valves, e.g. using Helmholtz effect · CPC title

• F02K7/02 Primary

  the jet being intermittent, i.e. pulse-jet · CPC title

• F02C5/11

  using valveless combustion chambers · CPC title

• F17D3/01

  for controlling, signalling, or supervising the conveyance of a product · CPC title