This study investigated the flow characteristics altered by Jang Bogo Antarctic Research Station using computational fluid dynamics(CFD) modeling. The topography and buildings around Jang Bogo Station were constructed...This study investigated the flow characteristics altered by Jang Bogo Antarctic Research Station using computational fluid dynamics(CFD) modeling. The topography and buildings around Jang Bogo Station were constructed with computeraided-design data in the CFD model domain. We simulated 16 cases with different inflow directions, and compared the flow characteristics with and without Jang Bogo Station for each inflow direction. The wind data recorded by the site’s automatic weather station(AWS) were used for comparison. Wind rose analysis showed that the wind speed and direction after the construction of Jang Bogo Station were quite different from those before construction. We also investigated how virtual wind fences would modify the flow patterns, changing the distance of the fence from the station as well as the porosity of the fence. For westerly inflows, when the AWS was downwind of Jang Bogo Station, the decrease in wind speed was maximized(-81% for west-northwesterly). The wind speed reduction was also greater as the distance of the fence was closer to Jang Bogo Station. With the same distance, the fence with medium porosity(25%–33%) maximized the wind speed reduction.These results suggest that the location and material of the wind fence should be selected carefully, or AWS data should be interpreted cautiously, for particular prevailing wind directions.展开更多
法藏敦煌藏文文书P.t.1097《官府支出粮食清册》应该是吐蕃统治敦煌时期当地官府支出粮食等物品的账目记录清单,文书中记载的职官押衙(am va gav)、长史(jang shi,亦可译为长使)、人名ya ya在吐蕃统治敦煌时期文书中已出现,并非只是在...法藏敦煌藏文文书P.t.1097《官府支出粮食清册》应该是吐蕃统治敦煌时期当地官府支出粮食等物品的账目记录清单,文书中记载的职官押衙(am va gav)、长史(jang shi,亦可译为长使)、人名ya ya在吐蕃统治敦煌时期文书中已出现,并非只是在归义军时期才出现的职官,不能据此将该文书定为归义军时期文书。展开更多
基金funded by a Korea Polar Research Institute project (PE16250)Hateak KWON is financially supported by PE17010 of Korea Polar Research Institute
文摘This study investigated the flow characteristics altered by Jang Bogo Antarctic Research Station using computational fluid dynamics(CFD) modeling. The topography and buildings around Jang Bogo Station were constructed with computeraided-design data in the CFD model domain. We simulated 16 cases with different inflow directions, and compared the flow characteristics with and without Jang Bogo Station for each inflow direction. The wind data recorded by the site’s automatic weather station(AWS) were used for comparison. Wind rose analysis showed that the wind speed and direction after the construction of Jang Bogo Station were quite different from those before construction. We also investigated how virtual wind fences would modify the flow patterns, changing the distance of the fence from the station as well as the porosity of the fence. For westerly inflows, when the AWS was downwind of Jang Bogo Station, the decrease in wind speed was maximized(-81% for west-northwesterly). The wind speed reduction was also greater as the distance of the fence was closer to Jang Bogo Station. With the same distance, the fence with medium porosity(25%–33%) maximized the wind speed reduction.These results suggest that the location and material of the wind fence should be selected carefully, or AWS data should be interpreted cautiously, for particular prevailing wind directions.
文摘法藏敦煌藏文文书P.t.1097《官府支出粮食清册》应该是吐蕃统治敦煌时期当地官府支出粮食等物品的账目记录清单,文书中记载的职官押衙(am va gav)、长史(jang shi,亦可译为长使)、人名ya ya在吐蕃统治敦煌时期文书中已出现,并非只是在归义军时期才出现的职官,不能据此将该文书定为归义军时期文书。
