upstream boundary 中文意思是什麼

upstream boundary 解釋
上游閉塞界限
  • upstream : adv. 向上游，溯流。adj. 1. 溯流而上的。2. （石油工業等）上游的，和石油的勘探、開采及輸送到起運港口有關的〈石油工業此後的提煉等過程則稱為下游（downstream）產業〉。
  • boundary : n 邊界，疆界，限界 （between）;（球場）邊線；界標；界限，范圍，分野。 aboundary dispute 邊界糾紛...
  1. As the velocity in the nozzle throat is sonic, the effect must be transmitted upstream through the boundary layer.

    當噴管喉部達到音速時，這種影響一定是通過附面層向上傳播而引起的。
  2. According to differences of construction process, boundary condition, temperature and stress of two schemes extending 3m deep short seam on upstream face in the middle of rcc overflow section and no short seam are calculated, what " s more, in this paper the equivalent line drawing of stable temperature field and unstable temperature field during construction and operation period and the duration curve drawing of typical points " s temperature and stress are plotted, and the results of peak and minimum on temperature in every month and maximum on tensile stress are attained

    根據施工過程和邊界條件，對溢流壩段中間上游面增設3m深短縫和不設短縫兩個方案進行了溫度和應力計算，並繪制出穩定溫度場等值線圖及施工期、運行期非穩定溫度場等值線圖，典型點溫度和應力歷時曲線圖，逐月最高、最低溫度和最大拉應力及相應位置等成果。
  3. The formula of calculating flood peak at downstream stations according to upstream flood peak at hydrometer station was proposed in this research. in the formula river boundary and flood type factors etc. were main factors and the formula can reflect the impacting factors of flood deformation

    報告給出了由上游水文站洪峰流量計算下游站洪峰流量的計算公式，公式包含有河道條件和洪峰峰型因子，較全面地反映了影響洪水變形的因素。
  4. To solve this problem, the method of " sucking - spouting " water has been put forward by lin bingnan, based on the theory of boundary layer control, namely, sucking part of the discharge at the upstream - side of the convex barrier and spouting it at the downstream - side

    林秉南院士提出了兩種方案： 1 、吸、噴水方案，即在邊界（突出山體）的順水面將邊界層水流吸走，並在下游面噴水增加水流動量，以控制迴流尺度。
  5. Results indicate that the characteristics of cavity flowfield were altered similarly by gas and liquid injection. the local boundary layer or shear layer are modified by injection on upstream / bottom wall of cavity, and the cavity shear layer immediately becomes angled with respect to the main flow direction. the injection on fore wall of cavity has little effect on the characteristics of cavity flowfield

    結果表明:氣體/液體噴流對凹腔整體流動特徵的影響是一致的，凹腔上游/底壁噴流破壞了當地附面層或剪切層，導致凹腔剪切層偏向主流方向;凹腔前壁噴注對凹腔流場特徵基本無影響。
  6. 4, it has shown, through the study on the temperature modeling of ertan reservoir, that the location of upstream boundary can not be placed on the section with a great temperature gradient in vertical, because the water temperature distribution at upstream boundary can control the temperature structure in reservoir

    4 .在二灘水庫水溫模擬研究的基礎上對入口邊界的設定作了初步的研究，認為入口邊界不適宜選擇垂向溫度梯度較大的斷面。這是因為入口水溫垂向分佈基本控制了庫區水溫的分層狀況，而且入口邊界的速度和溫度條件的不匹配會導致較大的誤差。
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