61results about How to "Has a modular feature" patented technology

Provided is a low-pollution combustion chamber adopting forced diversion at a main-combustion-stage outlet. The emission level of LTO circulating pollutants can be lowered, and the ignition performance of the combustion chamber is improved. A fuel nozzle supplies all fuel to the combustion chamber, main-combustion-stage fuel is sprayed into an inner channel of a main-combustion-stage pre-film plate, part of fuel forms main-combustion-stage straight spray oil mist, part of fuel is sprayed to the main-combustion-stage pre-film plate to form an uniform oil film, breaking and atomization are conducted under the two-path rotational flow shear effect of the pre-film plate inner channel and a pre-film plate outer channel to from main-combustion-stage pneumatic atomized oil mist, the oil mist and the air are mixed to form an uniform oil-air mixture, and the oil-air mixture enters a flame tube for pre-mixing combustion; and a main-combustion-stage outlet diversion ring is mounted at the main-combustion-stage outlet, the longitudinal section of the outer side of the outlet diversion ring is in a smooth arc line, the arc line is inward in the radial direction and extends forwards in the axial direction, the radial height of the arc line is not larger than 1 / 2 of the penetration depth of the main-combustion-stage straight spray oil mist so that the main-combustion-stage air flow can form expanding flowing, and a full center backflow region is formed.

The invention discloses a double-pre-film pneumatic nebulization low pollution combustor head structure. Combustion is organized in a combustor head in a center classification mode. The combustor head structure is divided into a main combustion level and a pre-combustion level. The pre-combustion level is of a double-level swirl cup structure, combustion is organized in a partially premixing mode, and the requirements for combustion stability and pollutant discharge of small working conditions are met. The main combustion level is of an axial swirler double-pre-film structure, combustion is conducted in a combustor in a premixing mode, and combustion pollutants can be effectively reduced through premixing combustion. The double-pre-film type main combustion level structure comprises two stages of independent oil collecting rings, two stages of axial swirlers and two stages of pre-film plate structures. Each stage of independent oil collecting ring is provided with a plurality of beveled fuel injection holes. Each stage of fuel is injected out through the fuel injection holes and then strikes the pre-film plates to be expanded into oil films. The structure is beneficial for fuel classification of the whole combustor under different working conditions, ensures reasonable oil-gas distribution, and further reduces the pollutant discharge level in the whole cycle of landing and taking off of the combustor of an aero-engine.

The invention relates to a pre-mixing and pre-evaporation low-pollution combustion chamber with a double-oil-way four-rotational-flow pre-film type main combustion stage. The combustion chamber is of a single-ring-cavity structure, and adopts a central staged combustion mode, wherein the head of the combustion chamber is divided into a preliminary combustion stage and a main combustion stage, the preliminary combustion stage adopts a mode of combining diffusive combustion with rotational-flow pre-mixing combustion, and is capable of reducing pollutant discharge under low-flow working conditions while ensuring combustion stability; the main combustion stage adopts a mode of pre-mixing and pre-evaporation combustion, and is capable of effectively reducing combustion pollutants. The oil way of the main combustion stage is divided into two stages, fuel oil in each stage forms an oil film on a pre-film plate, and the oil films are atomized, evaporated and blended under the action of two rotational flows to form a uniform oil-gas mixture, thus facilitating reduction for the combustion pollutants; due to the double-oil-way design, the one-stage working of the main combustion stage under low-flow and medium-flow working conditions such as entrance, and the two-stage working of the main combustion stage under high-flow working conditions such as take-off can be met, thus facilitating the oil-gas matching of the combustion chamber under different working conditions, and further reducing the pollutant discharge level of the whole landing and take-off circulation of the combustion chamber of an aeroengine.

The invention relates to a low-emission combustion chamber with main combustible stage head part multi-point slant oil taking. A single-ring cavity structure is adopted; the combustion chamber is composed of a combustion chamber outer casing, a combustion chamber inner casing, a flame tube outer wall, a flame tube inner wall and a combustion chamber head part; all the air for combustion enters a flame tube from the combustion chamber head part, a classification combustion scheme is adopted, and is divided into a pre-combustion stage and a primary combustion stage; a diffusion combustion organization mode with stable rotational flow is adopted for the pre-combustion stage, and a premixing combustion organization mode with slant oil supplying is adopted for the main combustible stage; the stable working range of the combustion chamber is mainly controlled by the pre-combustion stage, the stable combustion in the combustion chamber within a wider working range can be ensured, and simultaneously a stable ignition source can be provided for the main combustion stage; and the pollution emission of the combustion chamber is mainly controlled by the main combustion stage, and the equivalent weight ratio of the premixing gas of the main combustion stage is controlled in a low-pollution combustion range, thus the great pollution emission reduction of the whole combustion chamber can be ensured. The premixing and pre-evaporation structure provided by the invention is simple, the favorable combustion stability of the combustion chamber is ensured, and simultaneously the pollution emission is reduced greatly.