渦位置 的英文怎麼說
中文拼音 [guōwèizhì]
渦位置
英文
vortex position-
Three kinds of trapezoid, delta and airfoil shaped vortex generators are designed based on traditional, sub boundary layer and micro - vortex generators conceptual design, to study the influence of the shape, height, aspect ratio, chordwise position, spanwise position and direction angles of vortex generators on boundary layer separation control
（ 5 ）綜合分析研究了渦流發生器的工作原理和設計原則。根據國內外資料，研究了渦流發生器形狀、高度、展弦比、尖削比、弦向位置、展向位置和方位角等因素對附面層分離控制效果的影響。We can use the mm5 model in definite time, definite area weather forecasting. we conclude that : : the moving route of this necw in its developing progress was direct - south along latitude, the cold air is rough, and just this made the rough vertical velocity ; the necw southern moving and conflicting with the west pacification sub - tropical high makes rough jet steam. the plenty south - west warm and wet air made by the jet stream gave the rainstorm demanded vapor ;. the rough vertical velocity by jet stream is a main reason in this rainstorm ; the mm5 model uses four - direction analysis data as its input, this avoids some errors occurred in observe and transfer, thus made the result more useful
綜合分析認為： （ 1 ） 、這次冷渦在其發生發展過程中，其移動路徑是沿經圈直線南壓，攜帶的冷空氣勢力較強，形成槽后較強的垂直運動； （ 2 ） 、西太平洋副熱帶高壓偏北位置與東北冷渦南壓形成的急流軸，把源源不斷的西南暖濕氣流輸送到遼西地區，也就是急流軸的左前方位置，為這次暴雨的產生提供了充足的水汽來源； （ 3 ） 、低空急流不但為暴雨輸送水汽，其造成的較強的垂直環流也是產生強降水的一個主要原因； （ 4 ） 、 mm5模式以四維同化資料作為初始場，最大限度地避免了觀測誤差可能造成的積分不穩定，提高了模擬結果的參考價值。The anomalous non - uniform heating induces anomalous cyclonic vorticity in south china, areas to the south of the yangtse and its mid - lower valleys, but anomalous anticyclonic vorticity in the indo - china peninsula and south china sea areas lead to the more southward position of wpsh than the mean
這種異常的非均勻加熱狀況導致我國華南、江南、長江中下游地區呈現異常氣旋性渦度製造，而中南半島大部和南海地區為異常反氣旋性渦度製造，使得1998年6月副高位置異常偏南。In chapter 2, a simplified analytical model is presented for the analysis of the bvi mechanism, adopting the beddoes " prescribed wake model. by this model, the azimuthal location and miss - distance of the bvi and the radiation directivity of the bvi noise are calculated and discussed, and some conclusions are obtained
在第二章，使用beddoes預定尾跡模型，建立了一個用於旋翼槳-渦干擾特性機理分析的簡化數學模型，分別對旋翼槳-渦干擾位置、槳-渦干擾距離和聲輻射方向性等進行了計算和分析，得出了有意義的結果。Working carefully in fast - flowing eddies created by crumpled steel and concrete, divers with only a foot of visibility had located some of the vehicles that were hurled into the river when the 40 - year - old bridge gave way during wednesday ' s evening rush hour in minneapolis
星期三傍晚下班交通高峰時期，密西西比河上方一座年逾40的橋轟然倒塌，斷橋的鋼筋混凝土掉入水中激起很多旋渦，水下救生員在能見度只有一英尺的水中經過認真摸索找到了一些被捲入急流旋渦中的汽車的位置Based on that penetration depth of eddy current is theoretically different for different operationalfrequency, the flaw depth quantitive measurement method based on the characteristicalfrequency was expounded. to find the best testing model and position, it analysed and discussedthe factors which effected measurement. the mathematic relationship between the specialfrequencyand flaw depth was established to realize the accureate measurement of flaw depth. it primarily researched the technology of alternating current magnetic field leakage testing ( ac - mfl ) in our country
在利用頻率掃描技術的基礎上，提出了基於拐點頻率的渦流檢測缺陷深度測量方法，對影響測量的多種因素進行了分析和實驗研究，得到了最佳的測試位置和測試方法，建立了拐點頻率和缺陷深度的定量關系，為深度的測量提供了新的途徑。And then, the cavity flow is simulated, and the streamline and pressure contour at different reynolds number are plotted, the stream function and location of vortex centers are agree well with the previous results, which indicate the incompressible lattice bgk model is reliable
進而對方腔流的速度場和壓力場進行了計算，繪制了不同雷諾數下的流線圖及壓力等高線圖，得到的迴流渦的位置和流函數的值和現有的數據十分吻合，表明本文不可壓格子模型是可靠的。The main relative systems of heavy - hard rainfall in northeast plateau are western pacific subtropical high, south asia high, low latitude systems, upper level jet ( ulj ), low level greater wind speed axes, westerly trough and plateau trough, low level vortex, cold frontal, occluded front in qinghai lake, mesoscale low pressure, heat low - pressure in qinghai, shear line and convergence line, mesoscale cloud cluster, etc. the west subsidiary model of south asia high is the main circulation type of heavy - hard rainfall in this area
3 、西太平洋副高、南亞高壓、低緯系統、高空急流、低空大風速軸；西風槽和高原槽、低渦、冷鋒、青海湖錮囚鋒以及中尺度低壓、青海熱低壓、切變線與輻合線、中尺度雲團等系統是高原東北部地區大到暴雨的主要相關系統。 100hpa上的南亞高壓中心強度加強，位置東西擺動預示高原地區將有降水產生，中心強度減弱，降水過程結束。南亞高壓西部副型是高原東北部地區大到暴雨的主要流型。Using ncep / ncar daily reanalysis data and scsmex data, an investigation is carried out of the relationship between the position variation of the west pacific subtropical high ( wpsh ) and the apparent heating in june 1998 based on the complete vertical vorticity equation
摘要採用ncep / ncar再分析逐日資料和scsmex等資料，根據全型垂直渦度傾向方程，研究了1998年6月西太平洋副高位置變動與大氣熱源的關系。Through composite analysis, results show that the increase of the negative vorticity in key area agrees well with the westward extension of sth. more studies reveal that the westward extension index can perfectly describe the position of the sth in june, according to the serial value of the sth position in june, it is founded that when the voticity value in the key area increases ( decreases ), the sth in june is more westerly ( easterly ) than normal
分析表明，該指數能夠很好描述西太副高中期內的西伸過程，當關鍵區負渦度增大時，表示西太副高西伸；同時，該指數也是描述副高東西位置的合理的指標，並由此建立了六月份副高東西向活動的年際序列，研究表明，當該區域負渦度值大，說明副高位置偏西；當該區域負渦度值小，說明副高位置偏東。For both newtonian flow and non - newtonian flow, the vortices are generated when the waviness of the bottom profile is beyond a critical number. by increasing the waviness, a second vortex can be generated. with the increasing of reynolds number, the symmetry of the streamlines at re = 0 is destroyed and the vortices are sloped and become larger
當波形板的波動度超出臨界值，波形板壁面上的流動出現流線分離，流動中有渦生成;增大波動度，流動中出現第二個渦; re = 0 ，流線在流場中對稱分佈;雷諾數增大，流線駐點在水平方向出現位置偏移，渦的范圍增大;對于非牛頓流體，隨著剪切變稀指數的減小，渦的作用范圍減小。Abstract : it introduces the principle of graphite electrode abrading tool and develops the software and hardware of nc machine. this can detect the position of platform feed with great inertial - mass through photoelectrical encoder, the vibration magnitude of translation worktable with eddy transducer. based on these the machine parameters can be automatically regulate, and the grinding process is smooth
文摘:介紹了石墨電極研磨成形機的原理和數控軟、硬體系統的研製開發；用光電編碼器實現了大質量進給滑臺的位置檢測；並用電渦流傳感器檢測平動臺振動量，進而實現了機器參數的自動調整，從而保證了石墨電極研磨成形機研磨加工的順利進行。( 5 ) as torsion is increased, the anticlockwise secondary vortexes and the negative area of the stream function increase ; the axial velocity moves anticlockwise ( annular pipe ) or clockwise ( circular pipe ) ; the friction factor ratio finally reaches the value about 1
（ 5 ）增大撓率，逆時針方向旋轉的一二次渦和流函數的負值區域增大，軸向速度最大值的位置按逆時針（環形截面）或順時針（圓截面）方向旋轉，摩擦系數比最終趨向於1 。The different organizing of mesoscale cyclone and " convective line " makes the mcss difference in shapes with circular or belt, respectively. a kind of favorable synoptic environment for ma
脊軸，走向和水汽羽平行，同時水汽羽也和一條正渦度帶相對應，其位置和走向均和低空es 。The paper researches the vortex moment caused by the shape and locality error of one hole in the sphere socket. by analyzing and comparing the result we can find the method to decrease the vortex moment
本課題只研究球窩其中的一個節流孔的形狀和位置誤差所引起的渦流力矩，通過分析比較計算結果，從而找到減小渦流力矩的方法。In 1999, the dipole existed in between the okhotsk high and the depression in the north of northeast china, thus the okhotsk high became active and maintained, the subh was located to an area quite further south than usual. the high persisted in the east region of nw china, the cold air flowed to the mid - lower reaches of the yangtze river along the high. in the east region of nw china, air steam under troposphere was strong sinking motion, and formatted the negative vorticity region, the vapour flux divergence was divgence. lt was apparently that the rain could n ' t occur in the eastern portin of nw china. in 2000 year, okhotsk high was very weak or did n ' t exist in, there was high in the east asia - japan, the subh is located to an area further north than usual. in the east region of nw china, the trough maintained, air stream under troposphere was strong ascending motion, the cycolonic circulation was prevailing, the vapour flux divergence was intensive convergences the rain easy happened in the east areas of northwest china
4多梅雨1999年鄂霍茨克海阻塞高壓與我國東北北部低壓形成偶極子，使得阻塞高壓穩定少動，西太副高位置偏南，西北地區東部持續受高壓控制，冷空氣沿此高壓流經長江中下游地區上空；在西北地區東部對流層中下層氣流下沉運動較強，呈反氣旋渦度，水汽通量散度輻散，不利於西北地區東部降水。空梅雨2000年相反，鄂霍茨克海高壓減弱甚至不存在，東亞-日本為高壓，西太副高位置偏西偏北，西北地區東部處于西風槽中，對流層中下層氣流上升運動增強，盛行低壓環流，水汽通量散度強烈輻合，有利於降水生成。When the baroclinicity of southwest vortex had not been built and where cold front existed, the rain belt may lie in anywhere of the left of southwest low level jet
在西南渦斜壓性未建立之前以及冷鋒附近，暴雨區可位於低層西南風急流左側的任何位置。Numerical simulation by cfd was carried out to understand the hot current behavior in a tunnel with longitudinal ventilation. it becomes clear that fire source modeling is very important because the hot current behavior is strongly affected by the fire source position and is sensitive to methods in the modeling of the fire source. the flame area which has developed from the fire source is an area of chemical reaction caused by combustion. even if grids in the vicinity of the fire source are made fine, it was difficult to simulate the heat generation area with consideration to this chemical reaction through using a method for setting the heat release rate simply on the fire source surface. therefore, we proposed a method adopting the knowledge on flame shape under the longitudinal ventilation and incorporating it into numerical simulation and it showed a good agreement with the experimental results. it was shown through experiments in a tunnel with longitudinal ventilation that the hot current developed toward the tunnel center downwind from the fire source near a wall. the cause was investigated by numerical simulation and it became clear from the results that the spiral air by the fire plume created a vortex in the crevice between the wall and the plume
運用cfd進行數字模擬，以了解縱向通風隧道內熱煙氣流的特性.通過模擬發現對火源進行模擬非常重要，熱煙氣流特性受火源位置的影響很大，並且對火源模擬方法很敏感.火源生成的火焰區是燃燒引起的化學反應區域.即使火源附近的木垛排列完好，也很難在考慮這些化學反應條件下模擬熱生成區域.建議考慮縱向通風隧道內火焰形狀並對它進行數字模擬.模擬結果與試驗結果非常吻合.試驗證明，在縱向通風隧道內，熱煙氣流從靠近墻體火源處順風向隧道中心蔓延.數字模擬結果發現，火災羽流造成的螺旋上升空氣會在墻體和羽流之間形成一個渦流區Abstract : numerical simulation by cfd was carried out to understand the hot current behavior in a tunnel with longitudinal ventilation. it becomes clear that fire source modeling is very important because the hot current behavior is strongly affected by the fire source position and is sensitive to methods in the modeling of the fire source. the flame area which has developed from the fire source is an area of chemical reaction caused by combustion. even if grids in the vicinity of the fire source are made fine, it was difficult to simulate the heat generation area with consideration to this chemical reaction through using a method for setting the heat release rate simply on the fire source surface. therefore, we proposed a method adopting the knowledge on flame shape under the longitudinal ventilation and incorporating it into numerical simulation and it showed a good agreement with the experimental results. it was shown through experiments in a tunnel with longitudinal ventilation that the hot current developed toward the tunnel center downwind from the fire source near a wall. the cause was investigated by numerical simulation and it became clear from the results that the spiral air by the fire plume created a vortex in the crevice between the wall and the plume
文摘:運用cfd進行數字模擬，以了解縱向通風隧道內熱煙氣流的特性.通過模擬發現對火源進行模擬非常重要，熱煙氣流特性受火源位置的影響很大，並且對火源模擬方法很敏感.火源生成的火焰區是燃燒引起的化學反應區域.即使火源附近的木垛排列完好，也很難在考慮這些化學反應條件下模擬熱生成區域.建議考慮縱向通風隧道內火焰形狀並對它進行數字模擬.模擬結果與試驗結果非常吻合.試驗證明，在縱向通風隧道內，熱煙氣流從靠近墻體火源處順風向隧道中心蔓延.數字模擬結果發現，火災羽流造成的螺旋上升空氣會在墻體和羽流之間形成一個渦流區4, the summer rainfall anomaly in northeast china bears close correlation with the atmospheric circulation backgroud. while cold air in middle and high levels of troposphere is active in wet year with the positive anomalies over high - latitude and polar area, the active longwave ridge, the anomalous long - wave ridge in northeast china and inner - mogolia as well as the northward and eastward of the polar vortex, the contrary is in the dry year in northeast china
4東北地區夏季降水異常與大氣環流背景有密切的關系，東北地區夏季多雨年在對流層中、高層冷空氣比較活躍，高緯和極區主要由位勢高度的正距平所控制，貝加爾湖以北的地區長波脊較為活躍，在東北地區和蒙古地區有異常的長波槽發展，極渦位置偏北、偏東；而在東北地區夏季少雨年則容易出現與上述相反的異常環流形式。分享友人