Abstract
In order to better reflect the actual heat transfer process, the heat transfer process of the gas jet matrix impact cooling strip steel was studied by the experimental method, and investigated the effects of jet Reynolds number Re, dimensionless nozzle spacing Χn/D (the ratio of the orifice spacing to the orifice diameter), dimensionless jet height H/D (the ratio of strip to orifice distance to orifice diameter) on forced convection heat transfer coefficient. Finally, the empirical formula of Nu is fitted basing on the experimental results. In order to study the strip jet cooling more comprehensively, combined with the experimental results, a one-dimensional unsteady heat transfer model was established for the cyclic spray cooling heat transfer of strip steel protective atmosphere, calculated the temperature field of strip steel by finite difference numerical calculation method, The results show that there is a maximum operating speed for strip steel of different thicknesses on the premise of meeting the performance requirements and safety; The larger Η/D or Χn/D, the higher outlet temperature of strip steel, and the increase rate of strip steel outlet temperature will decrease with the increase of Η/D and Χn/D; As the temperature of the cooling medium increases by 10 °C, strip steel outlet temperature increases by about 5 °C. When the volume percentage of hydrogen in the cooling medium and the flow rate of the cooling medium increase, the temperature of strip steel outlet will decrease, however, the rate of decrease will gradually decrease. The industrial application results showed the calculated value of the outlet temperature of strip steel agrees well with the measured value, and the error is about 2.78%, which means that the model meets the application requirements.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
