vortex surface 中文意思是什麼
vortex surface
解釋
渦面-
The main research outcomes were as follows : ( 1 ) the paper applied quasi - three dimensional design model and optimization design model based on si flow surface that was effected by runner ( impeller ) and guide vane jointly. the vortex flow, blade thickness limitation and runner ( impeller ) blade force functions were taken into account. the paper got the improved runners of hl240 type, which were runner hlx240d and runner hlx240e
主要成果有： （ 1 ）應用考慮轉輪來流有旋、葉片有限厚及轉輪（葉輪）葉片力作用的轉輪（葉輪）與導葉聯合作用的基於s _ 1流面的準三維設計模型和優化設計模型，研究出了hl240的改進型轉輪： hlx240d和hlx240e 。 -
In the second part, firstly, the mathematical model for predicting hydrodynamic characteristics of varivec propeller under steady or unsteady condition are present, based on the general propeller lifting - surface theory, potential flow theory and green theorem. then, theoretical calculation methods for predicting hydrodynamic characteristics of varivec propeller designed above paragraphs are present, based on the finite basic solution method, the unsteady vortex lattice method and hess - smith method
在理論計算部分，本文首先基於常規螺旋槳升力面理論、勢流理論和格林定理建立了定常和非定常狀態下全方向推進器水動力性能計算的數學模型，然後利用有限基本解法、非定常渦格法和赫斯?史密斯方法對全方向推進器定常和非定常狀態下的數學模型進行了數值離散，接下來針對前面所設計的全方位推進器進行了數值預報。 -
As it vaporizes, tiny gas jets spin and tumble the ice shards across the surface of the water. during their brief lifetimes, the dry ice shards collide and spin a multi - armed vortex of white mist
乾冰氣化時產生的小噴流帶動乾冰碎片在水面不斷旋轉翻滾，互相碰撞，產生一團團有多個分支的白霧旋渦。 -
Based on the green ' s formula and the assumption of the propeller blade ' s thin sections, a lifting - surface method of propellers with the vortex lattice and equal source panel distributions on the mean camber surface has been introduced for the prediction of steady propeller ' s hydrodynamics in this paper. an approximate kurta condition was applied
基於creen公式和薄翼理論假設導出的升力面方法，採用在螺旋槳拱弧面上分佈離散渦、源布置方法預報均勻流場中的螺旋槳的定常性能，螺旋槳尾渦面上壓力連續性條件採用近似的kutta條件處理。 -
The surface of propeller, hub and the vortex of blade is discreted by a number of small hyperboloidal quadrilateral panels with constant source and doublet distribution
槳葉、槳轂表面和螺旋槳尾渦面採用四邊形雙曲面元離散，以消除面元間的間隙。 -
Surface microtopography, representation and tracer of microscale vortex dislocation of hydrothermal synthetic sapphires and natural beryls are studied by using atomic force micro - scope and interference microscope
摘要採用原子力顯微鏡、干涉顯微鏡對水熱法合成藍寶石和天然綠柱石等寶石的表面微形貌進行了研究。 -
Abstract : this paper uses the topology theory to analyze the surface flow spectrums of straight, positively curved and negatively curved cascades with relative tip clearances of 0. 023 and 0. 036, finds apparent differences of topology and vortex structures in the blade tip and the suction side wall corner of single type of cascade with this two clearances, and studies the mechanism of the difference formation as well as their effects on the energy loss
文摘:應用拓撲原理分析了葉頂相對間隙為0 . 023和0 . 036的渦輪直葉柵和正、反彎葉柵的壁面流譜，發現在兩種間隙下同類葉柵的拓撲與旋渦結構在葉頂和吸力面壁角明顯不同，探討了差別形成的機理及其對能量損失的影響 -
Often the vortex pinning can be increased by making the individual crystallites ( or grains ) of the material smaller, thus increasing the surface area associated with grain boundaries, where vortices get pinned
這是因為晶粒邊界面積的比例，會隨著晶粒的縮小而增加，而渦流就是固定在晶粒邊界上。 -
In the first part of the paper, on the basis of the weather processes of huai he basin from june to august in 1998, the difference and reliability of the two reanalysis data game and ncep from the fields of basic element, derivative, precipitation, and surface flux were studied by diagnostical and statistical methods. the results showed that the game reanalysis data is more reliable than ncep / ncar reanalysis data at the bottom and mid - high levels of troposphere, and at the precipitation and surface flux fields the case is just the same. in addition, the paper revealed that the game reanalysis data can show the evolution of the southwest vortex but the ncep / ncar reanalysis data cannot do so
在第一部分，本文以1998年6 - 8月我國江淮地區的天氣過程為背景對game和ncep兩組不同的再分析資料的基本要素場、導數場、降水量場和地面通量場用氣候診斷和統計的方法進行了對比分析，結果表明，在對流層低層和中高層game再分析資料的基本要素場及地面的降水場和通量場較ncep再分析資料更為準確； game再分析資料能很好地反映出西南渦東移並影響江淮大暴雨的重要天氣特徵，而ncep資料則反映不出這一現象。 -
The complex vortex system structure and shock wave system structure inside this rotor is obtained. wall flow patterns on the blade surface and hub surface are found out. the complex vortex system structure, such as horseshoe vortex, passage vortex, corner vortex and trailing vortex, and the interaction with shock wave system are researched. especially, the character of the tip clearance flow inside the rotor passage is revealed, and the interaction between shock wave and tip clearance flow near blade tip and the evolution of tip clearance flow are considered
給出了葉片表面及輪轂面上的壁面流型，分析並揭示了轉子葉道內的馬蹄渦、通道渦、角渦、尾渦等復雜渦系及其與激波的相互干涉；特別是，分析並揭示了轉子葉道內頂隙射流的特點，得到了頂隙附近激波與泄漏流動的干涉形態及泄漏流動的發展，並著重給出了其與激波的干涉形態。 -
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 -
The surface panel method has been applied to predict the hydrodynamic performance of highly skewed propeller. the surface of propeller and its trailing vortex are discreted by a number of small hyperboloidal quadrilateral panels with constant source and doublet distribution. for highly skewed propeller, the conventional method generating grid oriented along constant radii will result in a high aspect ratio and a high skewness and a twist panel near the propeller tip on blade surface, which result easily in incorrect calculation results of velovity on blade surface, even in iteration divergence and calculation failure. a “ non - conventional grid ” is developed to acoid these problems. this grid can effectively solve the problem of the calculation and convergence for highly skewed propeller. the non - linear kutta condition of equal pressure on upper and lower at the trailing edge is executed by the iterative procedure. by sample calculating, the obtained results are satisfied the experimental data
採用面元法預報大側斜螺旋槳水動力性能，螺旋槳表面及尾渦面離散為四邊形雙曲面元，每個面元上布置等強度源匯和偶極子分佈.對于大側斜螺旋槳而言，槳葉表面採用常規的等半徑網格劃分方法在近葉梢處將導致大展弦比、大側斜和扭曲面元，這容易使槳葉表面速度的計算結果不正確，甚至會導致迭代過程發散及計算失敗.文中建立了一種「非常規網格」劃分方法，能有效地解決大側斜螺旋槳的計算和收斂問題.槳葉隨邊處通過迭代實現非線性等壓庫塔條件 -
It is revealed that the heavy rainfall is mainly induced together by the trough at 500hpa, mesoscale vortex at 850hpa and stable mei - yu front at surface
發現這次強降水過程是在受500hpa低槽、 850hpa中尺度低渦和地面靜止鋒的共同影響造成的。 -
In lifting - surface theory, the non - liner phenomena of the trailing vortex in the transition wake area and of the tip vortex separation are considered. in surface panel method hyperboloidal quadrilateral panels are employed and the morino ' s analytical formulation is used to determine the influence coefficients. the more reasonable pressure kutta condition is satisfied at the trailing edge of propeller blade
在計算中，對于升力面理論，本論文考慮了過渡區尾渦收縮和葉梢分離的非線型現象的影響；對于面元法，本論文採用的是計算較為簡便的基於擾動速度勢的基本公式及雙曲面形狀的面元，在槳葉隨邊滿足更趨合理的壓力kutta條件，並用morino導出的解析公式計算面元的影響系數的快速有效的數值預報方法。 -
At first, the generating mechanisms of four kinds of wake features are studied in the thesis. we have simulated the features of ocean surface waves, kelvin wake, narrow v wake, turbulent wake, vortex wake, and internal wake. the kinetic equation of kelvin wake have been analyzed and improved, which can be used to calculate the kelvin wake of a submerged moving body
論文首先研究了四種常見尾跡特徵的產生機理，模擬得到了海面、 kelvin尾跡、窄v尾跡、湍流和渦流尾跡以及內波尾跡特徵；改進了kelvin尾跡的動力學模型，使之能夠計算運動物體下潛后的kelvin尾跡波高分佈。 -
At the preliminary stage of burning the gas flows along the back surface of the submerged nozzle and no recirculation forms in the aft - end cavity. at the medium stage of burning a weak recirculation forms in the rear of aft - end cavity by the force of injection flow. at the end stage of burning the flow separates at the c ombustion channel and a strong vortex forms in the aft - end cavity
實驗結果表明，在發動機工作過程中隨著燃面的退移，燃燒室尾部的流動會發生很大變化，初始時刻背壁區加質流沿噴管背壁進入噴管，背壁區沒有迴流形成；中間時刻在加質流的驅動下背壁區後部形成較弱的迴流；結束時刻氣流在燃燒室壁面分離，背壁區形成強烈的迴流。 -
The duct and it ' s vortex is discreted by a number of small straight quadrilateral panel. constant source and doublet distribution is placed on each panel on the surface of body, and constant doublet distribution is placed on each panel on the surface of vortex
以面元的幾何形心為控制點，在每個物面面元的控制點上布置等強度的源匯分佈和偶極子分佈，每個尾渦面面元控制點上布置等強度的偶極子分佈。 -
Then virtual dielectric constant method is adopted to calculate the electric field distribution with floating electrodes, and equivalent conductance rate method is adopted to calculate the electric field distribution with surface filth or local puncture in the insulator, furthermore the value scope of virtual conductance rate and equivalent conductance rate are discussed and some useful results are got. for the solution of vortex loss of silicon steel sheets concerning current transformer, the h solution has also been put forward rather than traditional a ? ( p method in order to reduce calculation load
採用虛擬介電常數法計算絕緣子存在懸浮導體的電場分佈，採用等效電導率法計算絕緣子存在表面污穢或局部擊穿情況下的電場分佈。對虛擬介電常數和等效電導率的取值范圍進行了討論，得出了一些有用的結論。對于電流互感器硅鋼片渦流損耗的計算，本文提出了不同於傳統的a -方法的h求解辦法，從而大大簡化了計算。 -
By using multi - channel observations of olr, hirs - tb12, erb, vis, ssmr and ssm i on the us satellites, it is analyzed that the global general atmospheric circulation features related to the anomaly of cold vortex over northeast china and it s premonitors are also revealed. it is found that there is an effected chain, which consists of sea ice over northern hemisphere, sea surface temperature in the mid - east equatorial pacific, asia monsoon and local budget of earth radiation in northeast china, on the anomaly of northeast cold vortex. the impacts of each factor in the chain are discussed. the results indicate that the applications of multi - channel satellite observations on research of climate change are of significance
利用美國氣象衛星olr ， hirs - tb12 ， erb ， vis ， ssmr和ssm i多通道的觀測資料，分析了東北冷渦異常年的全球大氣環流特徵及其關鍵地區的先兆特徵對于東北冷渦異常，發現了有一個由北半球的海冰，赤道東太平洋的海溫，亞洲的季風以及東北地區地氣系統輻射收支組成的影響鏈存在。由此討論了影響鏈上的各因子對東北冷渦異常的作用。結果表明多通道衛星觀測資料的綜合應用在氣候變化的研究和預測中有著重要的意義。
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