VALVELESS PULSED DETONATION COMBUSTOR

• US 20070245712A1
• Filed: 03/27/2007
• Published: 10/25/2007
• Est. Priority Date: 03/28/2006
• Status: Active Grant

• Current Assignee: Purdue Research Foundation (Purdue University)
• Original Assignee: Purdue Research Foundation (Purdue University)
• Inventors: Shimo, Masayoshi, Meyer, Scott
• Granted Patent: US 7,758,334 B2
• Time in Patent Office: Days
• US Class Current: 60/249
• CPC Class Codes: F02K 7/04 with resonant combustion chambers
• CPC Class Codes: F05D 2260/99 Ignition, e.g. ignition by warming up of fuel or oxidizer in a resonant acoustic cavity
• CPC Class Codes: F23C 15/00 Apparatus in which combustion takes place in pulses influenced by acoustic resonance in a gas mass for generating combustion products of high pressure or high velocity F23R7/00; starting devices F23D11/42
• CPC Class Codes: F23R 7/00 Intermittent or explosive combustion chambers

Abstract

Pulse detonation combustors of valveless construction. One valveless pulse detonation combustor, having a tube with a closed end and an open end, is constructed with a flame accelerator within the tube, adjacent the open end. A valveless, apertured flow restrictor is positioned between the flame accelerator and the closed end of the tube. A sparking device is positioned within the tube, between the flow restrictor and the flame accelerator. Valveless fuel and air ports are positioned between the flow restrictor and the closed end of the tube. Substantially right-angle manifold passageways are in communication with each of the ports.

Claims

1. A valveless pulse detonation combustor having a tube with a closed end and an open end, comprising:

a flame accelerator within the tube, adjacent the open end;

a valveless, apertured flow restrictor positioned between said flame accelerator and the closed end of the tube;

a sparking device within the tube, between said flow restrictor and said flame accelerator;

a valveless fuel port and a valveless air port through the tube, both ports positioned between said flow restrictor and the closed end of the tube; and

substantially right-angle manifold passageways in communication with each of said ports.

2. The valveless pulse detonation combustor of claim 1, wherein said flow restrictor has 5 to 10 percent open area.

3. A valveless pulse detonation combustor, comprising:

a generally straight tube having a closed end and an open end;

a flame accelerator within said tube, adjacent said open end;

a perforated wall spanning the cross-section of said tube, positioned between said flame accelerator and said closed end of said tube;

a sparking device within said tube, between said perforated wall and said flame accelerator;

a valveless fuel port and a valveless air port through the tube, both ports positioned between said perforated wall and the closed end of the tube; and

substantially right-angle manifold passageways in communication with each of said ports.

4. The valveless pulse detonation combustor of claim 3, wherein said perforated wall acts as a stationary flow restrictor.