DEVICE FOR FUEL COMBUSTION Russian patent published in 2004 - IPC

FIELD: combustion of fuel in low-emission combustion chambers of various power systems. SUBSTANCE: the device for fuel combustion has a precombustion and the main combustion chambers, the first inlets of air, fuel supply and the first swirler located on the side of the inlet of the precombustion chamber, device for ignition of fuel-air mixture, second inlets of air and fuel supply, mixing chamber, the precombustion chamber is made cylindrical with smooth walls, the device is additionally provided with a gas passage, whose inlet is connected to the outlet of the precombustion chamber, and the mixing chamber is located coaxially around the gas passage forming a ring assembly consisting of three successively positioned sections the first, second and third diffusion ones, the inlet of the first section of the mixing chamber is positioned near the inlet part of the gas passage, the outlet of the diffusion section of the mixing chamber is located near the inlet of the main combustion chamber, the outlet of the gas passage is located near the inlet to the diffusion section of the mixing chamber, the second inlets of air and fuel supply are located on the side of the inlet to the first section of the mixing chamber, the device for ignition of the fuel-air mixture is located on the side of the inlet of the precombustion chamber on its axis, the first inlet of fuel supply is located between the device for ignition of fuel-air mixture and the first swirler, the device is additionally provided with a swirler located at the inlet to the diffusion section of the mixing chamber. The first swirler is made in the form of holes in the body of the precombustion chamber spinning the flow relative to the axis of the mentioned chamber. The swirler located at the inlet to the diffusion section of the mixing chamber is made in the form of blades. The first section of the mixing chamber is made as a contraction or cylinder. The second section of the mixing chamber is cylindrical. The main combustion chamber is ring-shaped. Several precombustion chambers and mixing chambers are installed at the inlet to the main ring-shaped combustion chamber. EFFECT: reduced emission characteristics of the device for fuel combustion, reduced heat density of the precombustion and main combustion chambers, improved characteristics of mixing of air and fuel and expanded range of stable combustion. 8 cl, 8 dwg