Diffusion and rectification integrated diffuser

A diffuser and diffuser section technology, which is applied to parts of pumping devices for elastic fluids, machines/engines, liquid fuel engines, etc., can solve problems such as complex manufacturing process, increased assembly difficulty, and large overall size , to achieve the effect of reducing processing difficulty and cost, reducing pressure loss, and reducing overall weight
CN111622985APending Publication Date: 2020-09-04上海尚实航空发动机股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
上海尚实航空发动机股份有限公司
Publication Date
2020-09-04

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Abstract

The invention discloses a diffusion and rectification integrated diffuser. The diffusion and rectification integrated diffuser comprises a centrifugal compressor wheel disc and a radial tubular diffusion section which are integrally formed; a plurality of rectification blades are evenly distributed in the circumferential direction of the centrifugal compressor wheel disc, an airflow rectificationchannel is formed between every two adjacent rectification blades; and a plurality of scattered through holes are formed in the circumferential direction of the radial tubular diffusion section from inside to outside, and an radial included angle between each through hole and the radial tubular diffusion section ranges from 20 degrees to 30 degrees. According to the diffusion and rectification integrated diffuser, pressure loss caused by diffusion can be effectively reduced, the working efficiency of a combustion chamber is improved; meanwhile, the shape design of the rectification blades limits the flowing direction of airflow, so that the overall structural size of a diffuser channel is shortened, and the working efficiency is further improved; and due to the integrally formed structuraldesign, the assembly difficulty of diffusion and flow guide is reduced, the overall weight of an engine is reduced, and the fuel economy and the overall performance of the engine are greatly improved.
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Description

technical field

[0001] The invention relates to the technical field of turboprop engines, in particular to a diffuser and rectification integrated diffuser. Background technique

[0002] The compressor, turbine and combustor in the aero-engine are the three core components. Generally, the absolute velocity of the air at the outlet of the aero-engine compressor reaches 120-220m / s. In modern advanced aero-engines, in order to further improve the compressor Boost ratios, airflow velocities are even higher. This part of kinetic energy must be effectively converted into static pressure energy. At the same time, the diversion gas needs to be collected and drawn out. Therefore, a diffuser is added between the compressor and the combustion chamber. The gas drawn out of the diffuser enters the flame tube to help fuel oil to be stable and efficient. Combustion makes the chemical energy of the fuel stably converted into heat energy, drives the turbine to do work, and finally converts ...

Claims

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