Self-adaptive low-pressure fuel oil distributor for multi-pipe pulse detonation combustor

Abstract

The invention relates to a self-adaptive low-pressure fuel oil distributor for a multi-pipe pulse detonation combustor and belongs to the field of aircraft engines. The self-adaptive low-pressure fueloil distributor comprises a low-pressure oil distribution cavity, fuel oil branches and pressure stabilizing sections; a fuel oil inlet is formed in the center of the top of the low-pressure oil distribution cavity, and a plurality of fuel oil outlets are formed in the bottom of the low-pressure oil distribution cavity at equal intervals; the plurality of pressure stabilizing sections communicatewith the fuel oil outlets of the low-pressure oil distribution cavity in a one-to-one correspondence manner through the fuel oil branches; each pressure stabilizing section is provided with a step through hole as a flow channel along a central shaft, the diameters of two ends of the step through hole are larger than the diameter of the middle part, and the section positioned in the middle part iscalled a thin-wall small hole; and the diameter of the thin-wall small hole is 0.010-0.025 times of the equivalent diameter of the detonation combustion chamber, and the axial length of the thin-wallsmall hole is 1-4 times of the diameter of the thin-wall small hole. Through the pressure stabilization of the low-pressure oil distribution cavity and the throttling of the thin-wall small holes ofthe pressure stabilizing sections, the fuel flow uniformity of each fuel oil branch of the distributor under the self-adaptive oil supply condition is effectively improved, the fuel backflow of the fuel oil branches caused by the gas pressure fluctuation in the detonation combustion chamber is reduced, the pressure pulsation in the oil distribution cavity is reduced, and the mutual interference among the fuel oil branches is reduced.

Description

technical field [0001] The invention belongs to the field of aero-engines, and in particular relates to an adaptive low-pressure fuel distributor for a multi-pipe pulse detonation combustion chamber. Background technique [0002] Detonation combustion has unique advantages such as fast propagation speed, self-pressurization, and low entropy increase in the combustion process. Therefore, the use of pulse detonation combustion in the engine can improve its cycle thermal efficiency, simplify the structure, increase the unit thrust of the engine and reduce fuel consumption. Rate. It has broad application prospects in the fields of unmanned aircraft, missiles and combined power devices, and is expected to become one of the most advanced power devices in the future. The miniaturization and weight reduction of the fuel accessory system of the multi-tube pulse detonation combustor, its core component, is a problem that must be solved to realize the engineering of this type of engin...

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Problems solved by technology

[0007] In order to avoid the deficiencies of the prior art, the present invention proposes an adaptive low-pressure fuel distributor for multi-pipe pulse detonation combustion chambers. In the case of adaptive fuel supply, the fuel flow of each fuel branch is uniform, the structure is simple, the processing is simple, and the work is stable, which solves the multi-tube pulse detonation combustion chamber fuel self-adaption supply oil distributor, uneven fuel distribution, and pulsation in the detonation chamber The problems of large pressure influence, complex electronic control equipment and low reliability

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