Anticipating Transient Problems during the Rapid Filling of Deep Stormwater Storage Tunnel Systems
Anticipating Transient Problems during the Rapid Filling of Deep Stormwater Storage Tunnel Systems
复制标题
预测深层雨水储存隧道系统快速填充过程中的瞬态问题
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
S. Wright
中科院分区：
文献类型：
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作者：
JOSE G. VASCONCELOS;S. Wright
摘要深埋式地下水储存隧道是缓解合流制污水溢流的一种替代方案，但在快速充水条件下，可能会出现瞬变流问题。这些问题包括过多的浪涌、管道填充孔的形成、截留的气穴和不受控制的空气释放。雨水隧道设计的初始决策通常基于稳定流考虑，但可能对瞬态水力性能产生重大影响。然而，隧道设计者很少有机会系统地评估几何特征（例如， 隧道直径、线形和连接区域）和流入过程线。这项工作的目的是提供一个检查的关键设计参数和性能的雨水隧道进行快速填充之间的关系。采用流态转换模型，模拟了216种不同的隧道快速填充情景，考虑了气-水相互作用，如气穴截留、压缩和膨胀。
AbstractDeep storage tunnels are an alternative to mitigate combined sewer overflows, but they may develop transient flow problems during rapid filling conditions. Such issues include excessive surges, formation of pipe-filling bores, entrapped air pockets, and uncontrolled releases of air. Initial decisions on stormwater tunnel designs are generally based on steady-flow considerations but can have a significant impact on the transient hydraulic performance. However, tunnel designers rarely have an opportunity to systematically assess the interplay between geometric characteristics (e.g., tunnel diameter, alignment, and junction areas) and inflow hydrographs. This work aims to provide an examination of the relationship between key design parameters and the performance of stormwater tunnels undergoing rapid filling. A flow regime transition model was used to simulate 216 different scenarios of rapid filling of tunnels, considering air–water interactions such as air pocket entrapment, compression, and expan...