Study on the influencing parameters of rough-strip energy dissipators of curved spillways based on orthogonal tests and numerical simulation

Abstract Rough-strip energy dissipators (R-SEDs) can be arranged at the bend bottom of curved spillways to dissipate and divert flow for flow. Using entropy weight TOPSIS methods, a multi-criteria evaluation system was established comprehensive dissipation diversion effects R-SEDs. Orthogonal tests numerical simulation were conducted analyze factors affecting these (average R-SED height, angle, spacing, width, centerline radius discharge rate). It found that width significantly affected R-SEDs' effects. Average spacing Bend average height combined diversion. Their larger than R-SEDs effectively alleviate adverse hydraulic phenomena in spillways. With recommended parameters, showed best performance, with rate increasing by 18.67% water surface superelevation coefficient decreasing 26.14%. The accuracy verified. This study provide reference design similar