| The fast axial flow(FAF) CO2laser has been as the main application of the light source in the high power laser processing industry for a long time,and a higher power, smaller and compact structure are always its most important development trend.The fan plays the decisive role to the gas flow in the FAF CO2laser, and then influence the flow field distribution in the discharge tube, discharge efficiency, laser power, beam quality, etc. In this case, the research about the fan in the FAF CO2laser has a lot of necessity for the design and optimization of the whole of the laser system.This paper further research a turbine blower applied to the FAF CO2laser, and the work mainly include the following aspects:(l)Studied the requirements that the fan corresponding must realize and the characteristics of different categories fan, according to the overall structure and the characteristics of gas flow mode in the FAF CO2laserAnd then determined the turbine with large flow and and high compression ratio was the best choice for the FAF CO2laser to end the selection and confirmation of the fan.(2)Carried out the three-dimensional numerical simulation contraposing the selected fan and its corresponding feature category,with the use of fluid dynamic (hereinafter referred to as CFD) relevanted principles of knowledge and calculation method, and.the application of Fluent software package as computing tools.(3)Adjusted the operation condition and export area structure of the fan,and compared analysis the calculated results on the basis of the above work.lt is concluded that the relationship between the working performance of the fan and the various operation condition or export area structure.This paper got the specific distribution of its internal flow field, the relation between the flow field distribution and the operation condition or export area structure through the numerical simulation research about a fan applied to the FAF CO2laser. All of these will provide not only the theoretical direction for the independent design and optimization of the fan and the integral design of the laser, but also a certain technical support for the further development of the high power, high stability, high beam quality FAF CO2laser. |
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