China Institute of Water Resources and Hydropower Research

China Three Gorges Corporation

Ping Ji

Tao Wang

Hao Wang

Huichao Dai

Hanqing Zhao

Xinlei Guo

Dingguo Jiang

Hui Fu

Yongxin Guo

Jiazhen Li

Yijun Zhao

Jiajia Pan

Jinzhi Lu

Yafei Duan

The present invention relates to a method for calculating a head loss coefficient and branch pipe flow distribution of a multi-point water intake. The method includes the following steps: inputting and determining a structure and size information of the multi-point water intake; determining a head loss coefficient; determining a head loss coefficient form of a confluence port; pre-estimating or adjusting a trial flow; performing trial calculation on the head loss coefficient of each branch pipe; comparing the head losses calculated by two flow paths; and carrying out overall calculation. According to the present invention, the flow of each branch pipe is adjusted and the head loss coefficient is repeatedly calculated by utilizing iterative calculation of the head loss coefficients of the flows in two directions, so that the head loss and the flow distribution proportion can be finally and accurately calculated.

Method for calculating head loss coefficient and branch pipe flow distribution of multi-point water intake

The invention relates to a device and method for laboratory ice jam and ice dam radar measurement tests, the device includes a non-metal water tank, a truss spans the top of the non-metal water tank, the truss is connected with a radar plate parallel to a surface of water through a lifting mechanism, a measuring radar is provided on the radar plate, a permeable measuring barrel soaked in the water is provided below the radar plate, a barrel bottom of the permeable measuring barrel is a permeable plate capable of rising and falling, model ice blocks are provided in the permeable measuring barrel, and a handle capable of shaking the truss upwards, downwards, leftwards and rightwards is provided on the truss. According to the invention, through establishing simulated ice jam and ice dam in the permeable measuring barrel, the formation and characteristics of the ice jam and the ice dam are tested, and systematic research can be carried out to address the difficulties, such as radar echo images and the dielectric constant, in the radar measurement of the ice jam and the ice dam and a water depth underneath the ice, so that the measurement accuracy of corresponding equipment is improved, and further development of related disciplines is promoted. A whole set of the device is simple in structure, low in cost, and facilitated and effective in the implementation of tests.

Device and method for laboratory ice jam and ice dam radar measurement tests

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Beijing, China

Ping Ji