基于1D水流特征隐式格式的水工隧洞过流能力分析

Analysis on Discharge Capacity of Hydraulic Tunnel Based on Implicit Scheme of 1D Flow Characteristics

基于适合输水系统无压流和有压流联合模拟的特征隐式格式法,考虑进口箱涵段、箱涵渐变段、隧洞段和出口箱涵段的水力特性,推导得到相应的特征边界条件,建立现状隧洞系统的瞬变流分析模型,用于系统的恒定流和非恒定流计算分析,着重分析在典型水位组合下系统的过流能力和典型断面的水力特性.

Based on the characteristic implicit scheme method suitable for the combined simulation of unpressurized flow and pressurized flow in the water conveyance system,considering the hydraulic characteristics of the inlet box culvert section,the box culvert transition section,the tunnel section and the outlet box culvert section,the corresponding characteristic boundary is derived.The transient flow analysis model of the current tunnel system is established to calculate and analyze the steady flow and unsteady flow of the system.The discharge capacity of the system under the typical water level combination and the hydraulic characteristics of the typical section are specially analyzed.