High-temperature and high-speed stable combustion method and device based on multistage jet flow and rotational flow

Abstract

The invention discloses a high-temperature and high-speed stable combustion method and device based on multistage jet flow and rotational flow, and belongs to the field of combustion. The device comprises a first-stage axial jet flow generating device, a second-stage axial jet flow generating device, a third-stage axial jet flow generating device, a tangential rotational flow generating device anda combustion chamber structure. An outlet of the first-stage axial jet flow generating device is arranged in an outlet of the second-stage axial jet flow generating device, and an outlet of the second-stage axial jet flow generating device is arranged in an outlet of the third-stage axial jet flow generating device. According to the method and the device, combustion characteristics and flow characteristics of axial jet flow flame and tangential rotational flow flame are fully utilized; the mixed gas of fuel and a diluent and an oxidizing agent which are introduced in a graded mode in the axial direction form high-speed non-premixed jet flames, the premixed gas of the fuel and the oxidizing agent which are introduced in the tangential direction form rotational flow premixed flame, high-speed flowing is guaranteed, meanwhile, the stability of the flame is maintained, and the stable high-speed flame is formed. The method and the device have the advantages of being high in combustion efficiency, stable in flame, resistant to ablation and the like.

Description

technical field [0001] The invention belongs to the field of combustion, and relates to a high-temperature, high-speed and stable combustion method and device based on multi-stage jet flow and swirl flow. Background technique [0002] Combustion is the most convenient and rapid way of transferring energy from fuels to other media. At present, most of the equipment, such as gas turbines, liquid rocket engines, etc., still rely on combustion to obtain energy from fossil fuels. However, there are still combustion instability and ablation problems in most combustion chambers, especially in combustion chambers with high air velocity and high flame temperature. Therefore, it is very important to develop stable combustion technology and anti-ablation technology. [0003] At the same time, most of the existing stable combustion technology and anti-ablation technology need to rely on the addition of external components. The structure is complex, the design and manufacturing costs a...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of the prior art and effectively improve the combustion instability and ablation problems existing in the existing combustion methods and devices, the present invention discloses a high-temperature, high-speed and stable combustion method and device based on multi-stage jets and swirls to solve The technical problem is: based on the multi-stage jet flow and swirl flow, the combustion characteristics of the high-temperature, high-speed and stable combustion device are improved, which has the advantages of high combustion efficiency, stable flame, and anti-ablation.

Images