Visualization and measurement of turbulent flow insidea Submerged Entry Nozzle and off the ports

• C.A. Real-Ramírez ^[1] ; I. Carvajal-Mariscal ^[2] ; J.R. Miranda-Tello ^[1] ; J. González-Trejo ^[1] ; R. Gabbasov ^[1] ; F. Sánchez-Silva ^[2] ; F. Cervantes de la Torre ^[1]
  1. [1] Universidad Autónoma Metropolitana

     Universidad Autónoma Metropolitana

     México

     
  2. [2] Instituto Politécnico Nacional

     Instituto Politécnico Nacional

     México

     
• Localización: Revista Mexicana de Física, ISSN-e 0035-001X, Vol. 67, Nº. 4, 2021, págs. 482-491
• Idioma: inglés
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• Resumen

  • This work presents the results of the analysis of the turbulent flow inside a Submerged Entry Nozzle and outside the ports of a model usingvisualization and PIV techniques. The Submerged Entry Nozzle model consists of a vertical, constant diameter tube with two rounded exitports found at the bottom with a downward angle of 15◦each. The visualization method is the first step in analyzing the characteristics of theport’s internal and external flow. To enhance the visualizations, a LED light source is employed to illuminate the Submerged Entry Nozzle,which reduces the reflections in the images. Also, a transparent cell consisting of a cubic volume with reduced dimensions was used tocapture images from the high-speed camera and to record the flow pattern. To calculate the fluid velocity within the Submerged Entry Nozzleand close to the exit ports, laser-illuminated Particle Imaging Velocimetry was used. We confirm the previously reported formation of vorticalstructures closed to the exit ports that interact with each other altering the swirl motion of the exit flow, previously reported. Visualization andParticle Imaging Velocimetry results were compared with the numerical simulations results. Experimental scaled model and ComputationalFluid Dynamics results were used to enhance the findings of the Submerged Entry Nozzle internal flow. On the other hand, physical modeland Smoothed-Particle Hydrodynamics results were used to expand the information of the jet flow outside the exit ports. Both physical andnumerical results display a high turbulent flow behavior close to and off the exit ports of the Submerged Entry Nozzle. Experimental andnumerical methods may be used together to develop a method to design a better Submerged Entry Nozzle and increase the quality of the steelslab.