An orifice-type air atomizing nozzle
An air atomization and nozzle technology, applied in the field of orifice-type air atomization nozzles, can solve problems such as insufficient fuel atomization, achieve the effects of reducing pollutant emissions, optimizing the effect, and preventing local over-rich fuel
Active Publication Date: 2020-06-19
CAS HEFEI MICRO GAS TURBINE RES INST CO LTD
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Problems solved by technology
[0003] In view of the shortcomings and deficiencies of the prior art, the purpose of the present invention is to provide an orifice-type air atomizing nozzle to solve the current problem of insufficient fuel atomization. After the liquid fuel is atomized once through the orifice plate, and then The swirler makes the air swirl, and the strong shearing effect of the swirling air performs secondary atomization on the liquid fuel, optimizing the fuel atomization effect, and good fuel atomization prevents local over-rich fuel and reduces pollutant emissions
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[0017] In order to make the object, technical solution and advantages of the present invention clearer, the following will be described in conjunction with the embodiments, the examples of which are shown in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated.
[0018] refer to figure 1 As shown, the orifice-plate air atomizing nozzle 21 applied to the combustion chamber of a gas turbine according to the embodiment of the present invention includes a nozzle body 22 with a thickness of 2mm and a cylindrical shape as a whole. 23 has a fuel injection hole 24 fixed by welding; a nozzle cavity 25 is formed inside the nozzle body 22 . The downstream end 23 of the nozzle body 22 is provided with a diversion chamber, the diversion chamber includes a contraction transition section located upstream and a straight section located downstream,...
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The invention discloses a pore plate type air atomizing nozzle. The pore plate type air atomizing nozzle aims to solve the problem that the fuel oil atomizing is not sufficient at present. The pore plate type air atomizing nozzle is characterized by comprising a nozzle body, a pore plate, a swirler and a fuel passage, wherein the nozzle body is annular, a fuel spray hole is formed in a downstreamend of the nozzle body, and a nozzle inner cavity is formed inside the nozzle body; the pore plate is fixed on the upper side of the nozzle inner cavity and divides the nozzle inner cavity into a primary atomizing area and a secondary atomizing area, and primary atomizing holes are formed in the pore plate; the fuel spray hole is located in the downstream of the secondary atomizing area; the swirler is arranged on the upstream of the secondary atomizing area; and the fuel passage is connected to the nozzle body and is used for supplying liquid fuel. According to the pore plate type air atomizing nozzle, primary atomizing is carried out on the liquid fuel through the pore plate, then the swirler is used for enabling the air to generate rotational flow, and secondary atomizing is carried outon the liquid fuel through the strong shearing action of the rotational flow air, so that the fuel oil atomizing effect is optimized, the good fuel atomizing prevents the fuel from being locally excessively rich, and emission of pollutants is reduced.
Description
technical field [0001] The invention belongs to the field of combustion chambers of gas turbines, and relates to an air atomizing nozzle, in particular to an orifice plate type air atomizing nozzle, which can carry out secondary atomization on fuel. Background technique [0002] A gas turbine engine combustor uses fuel nozzles and a fuel-air mixer to mix and burn fuel with compressed air. To reduce smoke and other undesirable by-products and to maximize combustion efficiency, the fuel is typically premixed with air in a fuel-air mixer prior to combustion. To produce efficient and complete combustion, fuel-air mixers are designed to atomize the fuel and premix the fuel with air. The existing combustion chamber nozzle technology mainly realizes fuel atomization through thin-film air atomizing nozzles. First, the fuel is formed into an oil film, and then the surface tension of the oil film is destroyed by the strong shearing action of the swirling air, so that the oil film is ...
Claims
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IPC IPC(8): F23R3/28F23R3/38
CPCF23R3/286F23R3/38
Inventor 张磊张志超尚伟张兴磊井彬杨超孟丽
Owner CAS HEFEI MICRO GAS TURBINE RES INST CO LTD