Circular flow diffusing device

Abstract

The invention relates to a circular flow diffusing device. The circular flow diffusing device comprises a throat, wherein a first flow guide ring part is coaxially arranged at one end of the throat, and is of a hollow circular truncated cone structure with two open ends, and the diameter of a free end of the first flow guide ring part is larger than that of the throat; a second flow guide ring part is coaxially arranged at one end of the throat, and is of a hollow conical structure with an opening in the bottom surface, the top end of the second flow guide ring part is located at the center point of a cross section of one end of the throat, and the diameter of an open end of the second flow guide ring part is larger than that of the throat; an air supply outlet is reserved between the free end of the first flow guide ring part and the open end of the second flow guide ring part; and the circular flow diffusing device further comprises a connecting mechanism arranged between the first flow guide ring part and the second flow guide ring part. Through reasonable arrangement of component structures, energy dissipation of two boundary layers in a traditional flow diffuser is avoided, meanwhile, by setting the radians of the flow guide ring parts, the strength and an action range of airflow vortexes are integrally reduced, conversion of mechanical energy into internal energy is reduced, a local resistance coefficient is reduced to 1.43, and the maximum resistance reduction rate can reach 50.3%.

Description

technical field [0001] The invention belongs to the technical field of reducing resistance of local components of ventilation ducts, and in particular relates to a circular diffuser. Background technique [0002] With the development of science and technology and economy, people's requirements for living standards are getting higher and higher. Therefore, ventilation and air conditioning systems have become an indispensable part of buildings, and their energy consumption has also increased significantly. The energy consumption of the ventilation and air conditioning system is one of the main energy consumption in buildings, accounting for about 65% of building energy consumption, and with the development of building intelligence, there is still a rising trend, in which the wind energy caused by resistance Energy consumption can account for 30% to 50% of the total energy consumption of a building. How to reduce the resistance of the ventilation system and ultimately reduce th...

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Problems solved by technology

[0003] At present, there are many studies on drag reduction of local components such as tees, elbows, and variable diameters, but less attention has been paid to local components such as circular diffuser tuyere, and the only research is only focused on the resistance characteristics of tuyere. , but the research on circular diffuser tuyere and its range is basically blank

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