舌形坎与短边墙坎泄流水舌空中扩散规律研究

Diffusion Regularity of Water Tongue Discharging from Tongue-Shaped Bucket and Asymmetry Bucket

表孔连续坎虽然具有经济实用、便于施工等优点,但同时也存在下泄水流过于集中,水垫塘底板冲击压力过大等问题。针对这一问题,部分项目的前期设计曾采用舌形坎和短边墙坎来改善水舌入水流态。但目前还没有公式可以对这些异形坎水舌扩散进行详细的数值计算。对通过舌形坎和短边墙坎的水舌流态进行了建模计算,并在对计算数据进行分析的基础上提出了不同坎形条件下掺气水舌空中横向扩散规律。

Continuous bucket is very useful in surface orifice because it is economical and easy to construct, but it also causes some problems such as centralization of flow, huge impact pressure on the soleplate of water cushion pond and so on. In order to solve these problems, tongue-shaped bucket and asymmetry bucket are adopted to improve the fluid state of water tongue, but there is no available formula to calculate the diffusion of water tongues of the two kinds of bucket so far. The paper establishes models for the water tongue fluid states of the two kinds of bucket lips. The diffusive regularity of iet flow is put forward on the basis of analysis of the calculation results.