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应用相似模化理论,对泡沫渣生成之前氧气顶吹转炉二次燃烧气相场进行了实验模拟,并采用粒子图像测速技术(PIV)测量其二维流场,发现在氧射流两侧形成2个强回流区.同一截面上,内侧回流区速度沿径向距离逐渐减小,在靠近氧射流流股内侧速度最小;外侧回流区负速度沿径向距离逐渐减小,正速度沿径向距离逐渐增大.不同截面上,距离二次氧孔越远,内侧回流区速度越平缓;外侧回流区,正速度越大,上升炉气越多.
The similarity modeling theory was used to simulate the secondary combustion gas phase field of the oxygen top blown converter before foam slag generation. The two-dimensional flow field was measured by particle image velocimetry (PIV) In the same section, the velocity of the inner recirculation zone gradually decreases along the radial direction, and the velocity is the lowest near the inner side of the oxygen jet stream. The negative velocity of the outer recirculation zone decreases gradually along the radial direction, and the positive velocity gradually decreases along the radial distance Increase in different sections, the farther from the second oxygen hole, the more smooth the velocity of the inner recirculation zone; the outer recirculation zone, the greater the positive velocity, the more the furnace gas.