The invention provides an integrated afterburner provided with a deflected rectification support plate. The integrated afterburner provided with the deflected rectification support plate can effectively enlarge a backflow area, prolong the staying time of a gas mixture and improve the combustion efficiency. Gas flows from an inner duct and an outer duct are mixed between rectification support plate flame stabilizers through sliding baffle type back duct ejectors. Blades of the rectification support plate flame stabilizers are periodically and evenly arranged, and each blade and the axial direction form a certain included angle. Fuel oil enters a fuel oil channel inside the rectification support plate flame stabilizers through an oil supply channel. The fuel oil is sprayed out through direct-injection type spray nozzle small holes on the two sides and mixed with the gas mixture of the inner duct and the outer duct, and then the fuel oil is combusted behind the rectification support plate flame stabilizers. Under the action of the rectification support flame stabilizers, the backflow area is enlarged, the staying time of oil and gas is prolonged, the oil and the gas are more evenly mixed, combustion is more complete, and then the combustion efficiency is effectively improved.

Integrated afterburner provided with deflected rectification support plate

The invention provides an afterburner with an airflow channel designed in a rectifying support plate, the oil and gas mixing degree can be effectively improved, the mixed gas staying time is prolonged, and the combustion efficiency is improved. Airflow from an inner duct and an outer duct is mixed among rectifying support plate flame stabilizers through a sliding baffle type rear duct ejector, airflow enters the support plate from small air inlet holes formed in the surfaces of the two sides of the rectifying support plate flame stabilizers and passes through the airflow channel formed by partition plates, the speed is reduced in the process, fuel oil in fuel oil channels is heated, then the fuel oil is sprayed out towards the center on the back through small air spraying holes formed in the surfaces of the tail flame stabilizers, the fuel oil enters fuel oil channels in the rectifying support plate flame stabilizers through oil supply pipelines, after being heated, the fuel oil is sprayed out through small oil spraying holes connected with the surfaces of the flame stabilizers, the fuel oil is disturbed through multiple strands of airflow, the fuel oil is further heated and mixed with the airflow, and combustion is conducted in a back low-speed backflow area. The fuel oil is good in heating, atomizing and evaporation effect and is disturbed by the airflow, the oil and gas mixing time is long in the low-speed area, accordingly the oil and gas mixing effect is good, and therefore the combustion efficiency can be improved. Meanwhile, ignition and stable combustion can be achieved under the condition of the small oil and gas ratio.

Afterburner with airflow channel designed in rectifying support plate

The invention provides an integrated afterburner of supporting plate tail dual oil channels. Fuel oil is supplied to the integrated afterburner through a hollow thrust augmentation inner cone, two supporting plates are installed on the two sides, close to the tail portion, of a whole flow supporting plate, and fuel oil channels are formed in the middles of the whole flow plate and the supporting plates on the two sides of the tail portion of the whole flow supporting plate correspondingly; and the fuel oil is sprayed out of the tail portion of the whole flow supporting plate and fuel oil spraying holes formed in the supporting plates on the two sides of the whole flow supporting plate. The integrated afterburner of the supporting plate tail dual oil channels has the advantages that by installing the hollow fuel oil channels of the thrust augmentation inner cone, the fuel oil in the thrust augmentation inner cone is preheated, and thus the fuel oil is subjected to pre-evaporation; by forming inclined-spraying fuel oil holes in the supporting plates on the two sides of the whole flow supporting plate, the fuel oil can reach the process of fuel oil primary atomization by hitting against the outer wall of the whole flow supporting plate; the pre-heated fuel oil is sprayed out of a spraying opening, and after hitting against the wall face, and the fuel oil basically is gas or a supercritical body; and viscidity is reduced, diffusivity is reinforced, the flowing ability is greatly improved, thus the fuel oil can be more evenly mixed with surrounding air, and burning efficiency of the afterburner is improved.

Integrated afterburner of supporting plate tail dual oil channels

The invention relates to a suction type fairing spoke flame stabilizer and provides a V-groove annular flame stabilizer for an integrated afterburner. Backflow is formed after the stabilizer, so that formation of a gas mixture is accelerated, fuel atomization and evaporation effects are improved, the combustion process is enhanced, and flames are stabilized. The V-groove annular flame stabilizer is reasonably designed behind a fairing spoke and integrated with the fairing spoke, and a backflow area is formed by a fuel-gas mixture behind a V-groove, so that formation of the gas mixture is facilitated, and the combustion process is enhanced. In a turbofan engine, force augmentation is mainly characterized in that cold air in an outer duct participates in combustion, and consequentially the problem of low-temperature stable combustion is caused; and the annular flame stabilizer can establish a stable high-temperature heat source in high-temperature air flow, and the combustion stability of the cold gas mixture in the outer duct is improved under the combined action of the annular flame stabilizer and the fairing spoke.

Integrated afterburner additionally provided with V-groove annular flame stabilizer

The invention relates to a gas turbine low-pollution combustion chamber single-vortex head structure. Firstly, central vortex air and central natural gas are mixed, and outer wall non-vortex air and outer wall natural gas are mixed. After that, the vortex air, the non-vortex air, the central natural gas and the outer wall natural gas are further mixed in a natural gas-air mixing cavity, the mixinguniformity of the natural gas and air can be improved, generation of hot spots can be avoided, and generation of nitric oxide is effectively lowered. By means of the gas supply mode of combination ofcentral vortex and outer wall non-vortex, the vortex intensity of head outlet airflow can be lowered, and the risk of occurrence of oscillation combustion is also lowered. By means of the combinationof the central natural gas and outer wall natural gas, the NOx-CO proportion can be improved, and flame stability is facilitated. A head outlet convergence section can improve the speed of natural gas-air mixed airflow, and tempering is effectively prevented. A tangential gas inlet small hole in the outer wall of a whirlcone can lower the risk of spontaneous combustion occurring inside the head structure.

Gas turbine low-pollution combustion chamber single-vortex head structure

The invention provides a pre-evaporation type integrated afterburner. An oil cavity is formed inside an afterburning inner cone, and is connected with a fuel oil channel inside a rectification support plate flame stabilizer. Fuel oil is heated in the oil cavity to become gas or a supercritical body, and then the gas or the supercritical body enters the fuel oil channel inside the rectification support plate flame stabilizer and is sprayed out from direct-injection type spraying nozzle small holes in the two sides. The spraying nozzle small holes are reasonably formed so that the mixing effect of the fuel oil and the gas can be effectively improved, and the burning efficiency is improved. In addition, a large amount of heat is transmitted to the fuel oil through the afterburning inner cone, so that the self temperature is decreased, and the infrared stealth performance is effectively improved. The pre-evaporation type integrated afterburner has the beneficial effects that on the basis of an integrated afterburner structure, by reasonably leading in the structure of the oil cavity inside the afterburning inner cone and the structure of the fuel oil channel inside the rectification support plate flame stabilizer and reasonably forming the direct-injection type spraying nozzle small holes, the burning efficiency is effectively improved, and the infrared stealth performance is effectively improved.

Pre-evaporation type integrated afterburner

The invention provides a micro-engine wave-type fuel-oil evaporating tube. By means of the micro-engine wave-type fuel-oil evaporating tube of the structure, the fuel-oil atomization effect and the fuel-oil evaporation effect can be effectively improved; and due to the uneven evaporating-tube wall face, perturbation of airflow in the evaporating tube is obviously enhanced, mixing is intensified, and the atomization effect is improved. The getting-better atomization effect of fuel-oil liquid drops also has the beneficial influence on the evaporation effect of the fuel-oil liquid drops; and as the diameter of the liquid drops gets smaller, the evaporation rate can get larger, the superficial area of the evaporating tube is also greatly increased through the wall face structure of the wave-type evaporating tube, the contact area between the evaporating-tube wall face and oil gas in the evaporating tube and the contact area between the evaporating-tube wall face and high-temperature fuel gas outside the evaporating tube are enlarged, the heat exchanging efficiency is greatly improved, and evaporation of the fuel-oil liquid drops is increased.

Micro-engine wave-type fuel-oil evaporating tube

The invention provides a head design of a combustion chamber of a twin-stage premixing ground-based gas turbine. The basic structure of the head comprises a central vortex tube, a crescent-shaped flame stabilizer and an outside annular vortex tube, wherein the central vortex tube is provided with double hydrocyclones; the crescent-shaped flame stabilizer is arranged at the down stream of the central vortex tube; and the outside annular vortex tube surrounds the central vortex tube. According to the design, a full-premixing combustion mode of the head is adopted mainly, so that the emission of NOx is reduced; air entering from a central value grade vortex tube of the head firstly passes through the first hydrocyclone, and then is mixed with ejected fuel; when a mixture flows out of the central vortex tube, the mixture is mixed and enhanced by the second hydrocyclone; at the same time, the hydrocyclone further prevents tempering; the central value grade premixed fuel forms a stable ignition source on the flame stabilizer; and the premixed fuel flowing out of the outside main burning stage is ignited, burning is carried out stably and mildly, and uniform combustion is achieved. The design can guarantee that the ground-based gas turbine can keep low emission of NOx and stable combustion on operating conditions of all loads.

Head design of combustion chamber of twin-stage premixing ground-based gas turbine

The invention provides a micro-engine combustion chamber spiral evaporating pipe with fins arranged inside The micro-engine combustion chamber spiral evaporating pipe is internally provided with a plurality of fin structures and is in a spiral shape The fin structures are arranged in two forms, namely a circular hole type and an 8-shaped hole type Due to the fin structures added inside the evaporating pipe, the superficial area of the inner wall face can be greatly increased, the contact area of oil-mixing gas and the evaporating pipe is increased and the heat exchange effect is enhanced In addition, the fin structures can decrease the flow speed of the oil-mixing gas to a certain degree, so that the effect that stay time of the oil-mixing gas in the evaporating pipe is prolonged is achieved and the heat exchange effect is enhanced The circular hole type fins has a large effect on gas flow speed decrease, and stay time of gas flow in the evaporating pipe is greatly prolonged The 8-shaped hole type fins are capable of largely increasing the area of the inner wall face of the evaporating pipe Accordingly, both the two types of fins have corresponding advantages The two types of fins can be combined and simultaneously arranged inside the same evaporating pipe so as to achieve the optimal atomization-vaporization effect By means of the spiral shape, the stay time of the oil-mixing gas in the evaporating pipe is prolonged and the heat exchange area of the oil-mixing gas in the evaporating pipe is increased, so that the oil atomization-vaporization is facilitated The good oil atomization-vaporization effect can improve the combustion performance

Micro-engine combustion chamber spiral evaporating pipe with fins arranged inside

The invention provides a cavity wall evaporating pipe of a combustion chamber of a mini-sized engine. By means of the cavity wall evaporating pipe, the contact area of gas flow and the evaporating pipe can be effectively enlarged, heat exchange is enhanced, the mixed gas standing time is prolonged, and the fuel oil atomization and evaporation effects are improved. A regular cavity structure is designed for the inner wall of the evaporating pipe, the area of the inner wall is enlarged, and space is increased. Fuel mixed gas flow forms backflow areas in cavities after flowing through the evaporating pipe, the speed is decreased, the mixing space of fuel oil and air is increased, the standing time in the evaporating pipe is prolonged, and the atomization and evaporation time is prolonged; meanwhile, the contact area is enlarged, and the heat exchange effect is enhanced. Bosses are designed on the portions, at the same positions of the cavities, on the outer wall of the evaporating pipe, the strength of the evaporating pipe is ensured, the area of the outer wall can be enlarged, heat exchange between high-temperature gas flow in a flame tube and the evaporating pipe is enhanced, the wall temperature of the evaporating pipe is raised, and the fuel atomization and evaporation effect in the evaporating pipe of the combustion chamber of the mini-sized engine is enhanced through the effects of the two aspects.

Yan Dongbo

Papers

Pre-evaporation type integrated afterburner

Micro-engine wave-type fuel-oil evaporating tube

Head design of combustion chamber of twin-stage premixing ground-based gas turbine

Micro-engine combustion chamber spiral evaporating pipe with fins arranged inside

Cavity wall evaporating pipe of combustion chamber of mini-sized engine