Analysis of Flow Characteristics and Structural Optimization of High-Strength Cooling Equipment for Hot-Rolled Strip Steel

High-strength cooling collectors are the key equipment for post-roll cooling technology of hot-rolled plates, and the internal flow characteristics of the collector are crucial to the quality and efficiency of cooling. In this work, numerical simulation is used to study the collector w2 (collector width), β (manifold inclination), and h2 (slot height) in different process parameters at the outlet of the velocity size and uniformity of the influence of the law. By comparing the two methods of steady state and transient state, the average velocity and flux errors are less than 0.1, and the effects of structural modifications on the outlet flow velocity and flow field uniformity were obtained for two sizes of trough nozzles. The results show that the increase in pressure increases the fluctuation in velocity, but the increase in velocity in the center of the slot outlet keeps decreasing; when the height of the tank h1 = 90 mm, the increase in β causes the velocity of the slot outlet to decrease, but the fluctuation in velocity increases; when h2 increases, the fluctuation in the velocity in the center of the slit outlet is obviously reduced, and the fluctuation is reduced most significantly when it is increased to 9 mm, but it will result in the decrease in the average value of the outlet velocity. Therefore, within the scope of this study, the optimal process parameters are inlet pressure 0.5–0.6 MPa, β = 10°, h2 = 9–15 mm, and w2 = 100–110 mm.