An adaptive low-pressure fuel distributor for multi-tube pulse detonation combustors

Abstract

The invention relates to an adaptive low-pressure fuel distributor for a multi-tube pulse detonation combustion chamber, which belongs to the field of aero-engines; it includes a low-pressure oil distribution chamber, a fuel branch circuit and a voltage stabilizing section, and a fuel inlet is arranged in the center of the top of the low-pressure oil distribution chamber , multiple fuel outlets are set at equal intervals at the bottom; multiple fuel outlets are connected to the fuel outlets of the low-pressure oil distribution chamber through the fuel branch; The diameter of the two ends of the hole is larger than the diameter of the middle part, and a section located in the middle is called a thin-walled small hole; the diameter of the thin-walled small hole is 0.010 to 0.025 times the equivalent diameter of the detonation combustion chamber, and its axial length is 1 to 4 times its diameter. times. Through the pressure stabilization of the low-pressure oil distribution chamber and the throttling of the thin-walled small holes in the pressure stabilization section, the fuel flow uniformity of each fuel branch of the distributor under the condition of self-adaptive fuel supply is effectively improved, and the fuel branch is reduced due to knocking in the combustion chamber. Fuel backflow caused by gas pressure fluctuations reduces pressure fluctuations in the oil distribution chamber and reduces mutual interference between fuel branches.

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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