Page - 1039 - in Book of Full Papers - Symposium Hydro Engineering

Fig. 8 Mean dynamic pressure coefficient [4] Fig. 9 Fluctuating dynamic pressure (RMS) coefficient for rectangular jet [4] 8. CONCLUSION A practical methodology for design of NT1 pre-excavated plunge pool has been applied. In the beginning, the ultimate scour depths due to spillway plunging jets are estimated using empirical relationships as well as qualitative scouring tests in physical model. In the next step, the pre-excavated plunge pool was designed for a flood frequency referring to the serviceability of the powerhouse. Then, the dynamic pressures on the plunge pool invert and berms were recorded and the according dynamic pressure coefficients were calculated. NT 1 Spillway Design Flood Jet (100-year Flood)- Maximum value of Cp on Plunge Pool Invert NT 1 Spillway Design Flood Jet (100-year Flood)- Maximum value of C’p on Plunge Pool Invert 1039