Ensuring that water flows smoothly into spillways is the main challenge in spillway design. In order to help avoid the formation of vortices and separation of flow along the guide wall in front of the gates during ove...Ensuring that water flows smoothly into spillways is the main challenge in spillway design. In order to help avoid the formation of vortices and separation of flow along the guide wall in front of the gates during overflow through the spillway, an experiment with a physical model of the Yutang Dam. bank spillway was carried out, The profile of the guide wall was redesigned to eliminate the formation of vortices and separation of flow. This involves opening up holes in the middle part of the guide wall. The test results show that the design is effective in improving the flow conditions of the inlet, and in ensuring the desired values of water head along the guide wall and discharge capacities of the spillway,展开更多
THE fluttering red,five-starred Chinese national flag guided us to the China-aided Agrotechnology Demonstration Center in Seme,20 or more km east of Cotonou,Benin＇s largest city.It stands within a gray-tiled,white-wa...THE fluttering red,five-starred Chinese national flag guided us to the China-aided Agrotechnology Demonstration Center in Seme,20 or more km east of Cotonou,Benin＇s largest city.It stands within a gray-tiled,white-walled Chinese garden-style compound.＂Over the past several years,groups of Chinese agricultural experts and management staff have come to Benin to cooperate with locals in crop cultivation and breeding,animal husbandry and poultry, so speeding up Benin＇s agricultural development and contributing to the country＇s poverty reduction drive,＂ general manager of the center Huang Jianping said.展开更多
文摘Ensuring that water flows smoothly into spillways is the main challenge in spillway design. In order to help avoid the formation of vortices and separation of flow along the guide wall in front of the gates during overflow through the spillway, an experiment with a physical model of the Yutang Dam. bank spillway was carried out, The profile of the guide wall was redesigned to eliminate the formation of vortices and separation of flow. This involves opening up holes in the middle part of the guide wall. The test results show that the design is effective in improving the flow conditions of the inlet, and in ensuring the desired values of water head along the guide wall and discharge capacities of the spillway,
文摘THE fluttering red,five-starred Chinese national flag guided us to the China-aided Agrotechnology Demonstration Center in Seme,20 or more km east of Cotonou,Benin＇s largest city.It stands within a gray-tiled,white-walled Chinese garden-style compound.＂Over the past several years,groups of Chinese agricultural experts and management staff have come to Benin to cooperate with locals in crop cultivation and breeding,animal husbandry and poultry, so speeding up Benin＇s agricultural development and contributing to the country＇s poverty reduction drive,＂ general manager of the center Huang Jianping said.
