Design of gas circulation system in high power TEA CO2 laser

The gas circulation system in TEA CO2 laser is very important. The parameters, the structure and the design of the system are analyzed. A symmetric structure is adopted and an axial blower and a plate-fin heat exchanger are selected. Using volume flux method, the gas velocity in the discharge zone is determined. The static pressure parameters of the fan are determined, taking into account of the additional resistance.The gas circulation system has an average gas velocity of 84.8 m/s, with inhomogeneity 4.2% longitudinally and 0.38% horizontally respectively. Under the condition of a discharge volume of 2.5×10-3 m3, a single pulse injection energy of 276 J, and a discharge pulse width at 150 ns, the system successfully achieves an even and steady glow discharge at a repetition rate of 400