Multi-boiling-point fuel mixed combustion device and ignition combustion method thereof

Abstract

The invention discloses a multi-boiling-point fuel mixed combustion device and a method of improving atomization combustion of high-boiling-point fuel by use of flash boiling of low-boiling-point fuel. The multi-boiling-point fuel mixed combustion device comprises a nozzle, a pressurizing storage device, a mixing conveying channel and an igniter. The nozzle is arranged at the outlet end of the mixing conveying channel, and the igniter is arranged at the ejection end of the nozzle. The mixing conveying channel is of a sleeve type hollow structure, a central cylinder of the mixing conveying channel is an independent channel, and a mixing channel is arranged outside the central cylinder in an encircling mode. The pressurizing storage device is connected with the independent channel and the mixing channel through a first feeding pipe and a second feeding pipe correspondingly. A third feeding inlet is formed in the initial end of the mixing channel. A material supply ring is arranged at theoutlet end of the second feeding pipe and arranged in the mixing channel in an annular surround mode, and a plurality of spray holes are formed in the material supply ring. According to the multi-boiling-point fuel mixed combustion device and the method, the atomization characteristic of the high-boiling-point fuel is improved by use of the feature that the low-boiling-point fuel is pressurized to form liquid fuel to be subjected to pressure reduction and flash boiling, and therefore the high-boiling-point fuel can be subjected to ignition and stable combustion under the low-temperature working condition.

Description

technical field [0001] The invention relates to a multi-boiling point fuel mixed combustion device and an ignition combustion method thereof, in particular to a device and a method for improving fuel atomization and ignition performance by mixing low boiling point fuel with high boiling point fuel. Background technique [0002] Gas turbine engine is the core power plant of modern aircraft and ships. Gas turbine engines have difficulty in igniting in low-temperature environments. The specific manifestations are narrowed ignition window, reduced ignition success rate, prolonged ignition time, and even ignition failure, resulting in engine failure and directly affecting the safe operation of aircraft and ships. The root cause of low-temperature ignition difficulties is that the temperature of the air flowing into the combustion chamber decreases sharply in a low-temperature environment, and the surface tension and viscosity of the fuel increase, making it difficult for the fuel...

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Problems solved by technology

When the ship sails in these areas, the temperature of the incoming air in the combustion chamber drops sharply, which deteriorates the fuel atomization and evaporation performance, making it difficult to start the ignition

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