With the Tanghe Diversion Channel in Tibet as an example, the theoretical study on the ice control effect of the solar sacks was conducted based on the previous study. The numerical simulation method was adopted and a...With the Tanghe Diversion Channel in Tibet as an example, the theoretical study on the ice control effect of the solar sacks was conducted based on the previous study. The numerical simulation method was adopted and a one-dimensional numerical model for ice crystal in diversion channels in high-altitude cold regions was developed in this article. The heat transfer through the air-water interface and the mass transfer between ice and water were considered in the model. The model was validated by the field observation data on the diversion channel of the Tanghe Hydropower Station. The results show that the ice control effect of the solar sacks is obvious in the channel with large mass flow rate in the high-altitude cold regions.展开更多
Usually, the action of sea ice on offshore engineering structures is one of the controlling loads in cold waters engineering structure design. The reasonable selection of environmental condition and the physical mecha...Usually, the action of sea ice on offshore engineering structures is one of the controlling loads in cold waters engineering structure design. The reasonable selection of environmental condition and the physical mechanical properties of ice in the region are directly related to the structure design, operation and safety. In this paper, the sea ice force acting on the structure, the physical mechanical properties of ice and the selection of parameters in calculation are discussed. Some suggestions are proposed as to the calculation of various kinds of ice loads acting on the structure.展开更多
The presence of ice cover on rivers causes the change in overall resistance to the flow. An method for determining the roughness coefficient of the underside of ice cover was presented based upon the direct measuremen...The presence of ice cover on rivers causes the change in overall resistance to the flow. An method for determining the roughness coefficient of the underside of ice cover was presented based upon the direct measurement of velocity distribution in regions near channel bottom and ice cover. The results of analysis show that the measured velocity profiles can be used to evaluate the resistance coefficients of ice-cover channel with more reliable accuracy.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant No.50469002).
文摘With the Tanghe Diversion Channel in Tibet as an example, the theoretical study on the ice control effect of the solar sacks was conducted based on the previous study. The numerical simulation method was adopted and a one-dimensional numerical model for ice crystal in diversion channels in high-altitude cold regions was developed in this article. The heat transfer through the air-water interface and the mass transfer between ice and water were considered in the model. The model was validated by the field observation data on the diversion channel of the Tanghe Hydropower Station. The results show that the ice control effect of the solar sacks is obvious in the channel with large mass flow rate in the high-altitude cold regions.
文摘Usually, the action of sea ice on offshore engineering structures is one of the controlling loads in cold waters engineering structure design. The reasonable selection of environmental condition and the physical mechanical properties of ice in the region are directly related to the structure design, operation and safety. In this paper, the sea ice force acting on the structure, the physical mechanical properties of ice and the selection of parameters in calculation are discussed. Some suggestions are proposed as to the calculation of various kinds of ice loads acting on the structure.
文摘The presence of ice cover on rivers causes the change in overall resistance to the flow. An method for determining the roughness coefficient of the underside of ice cover was presented based upon the direct measurement of velocity distribution in regions near channel bottom and ice cover. The results of analysis show that the measured velocity profiles can be used to evaluate the resistance coefficients of ice-cover channel with more reliable accuracy.
