（1. Collaborative Innovation Center of Steel Technology， University of Science and Technology Beijing， Beijing 100083， China 2. Rizhao Steel Holding Group Co.， Ldt， Rizhao 276806， Shandong， China 3. Institute of Engineering Technology， University of Science and technology Beijing， Beijing 100083， China）
Abstract：The physical model of a beam blank continuous casting mold with a cross-section size of 767.3 mm×383.1 mm×103.2 mm have been established in the ratio of 1[∶]1， in order to assess the influence of different technical parameters and nozzle structures on the flow field. PIV （particle Image Velocimetry） measurement technique was applied in this research. The experimental results showed that reducing the casting speed and increasing the inner diameter at the bottom of the nozzle can effectively reduce the penetration depth of the jet flow. The maximum velocity of jet flow at the depth of 860 mm in the mold decreased by 27.96% and 41.46%， respectively. Increasing the casting speed and decreasing the immersion depth of the nozzles can heighten the upper vertices of lower eddies in the flow field. The flow field in the mold can be improved by reducing the casting speed and the immersion depth of nozzles and increasing the inner diameter at the bottom of the nozzles.
2019, Vol. 38 
