instability in flow 中文意思是什麼

instability in flow 解釋
氣流不穩定性
  • instability : n. 動搖性，不穩定性；不堅決，反復無常，三心二意。 the instability of human affairs 人事滄桑。
  • in : adv 1 朝里，向內，在內。 A coat with a furry side in有皮裡子的外衣。 Come in please 請進來。 The ...
  • flow : vi 1 流，流動。2 （血液等）流通，循環。3 流過；川流不息；（時間）飛逝；（言語等）流暢。4 （衣服、...
  1. Wet and dry numerical simulation tests for explosive cyclone over western pacific were performed. by contrast the results show that : tropopause and constant temperature surface were raised by latent heat release in upper level and disturbance trough was produced because air flow ascended and became cold. owing to this process adaption, inertial instability emergenced

    對氣旋強烈爆發的過程進行干濕對比數值模擬試驗，得出：潛熱釋放使對流層項和等溫面抬高，氣流在高層的上升冷卻形成擾動槽，其適應過程使高層出現慣性不穩定。
  2. The analysis of the large - scale synoptic situation shows that strong precipitation is closely related to the explosion of monsoon and the intensification of cross - equatorial flow which bring a lot of vapor and meet with cold masses at the eastern of northwest district on 8th, june causing extremely heavy rainfall ; that subtropical high - level jet at 200hpa, subtropical high at 500hpa and low - level jet at 850hpa are the weather backgrounds favorable to strong precipitation ; that the pattern of eastern highs and western lows and the establishment of a low - level jet and the coupling between upper - and low - level patterns that determine that the rain occurred in the east of the northwest china ( on average, this is the rainy season for the south of china, but not for the northwest china ) ; that water vapor comes from southerly and easterly flow which converge at the eastern of northwest district with convergence mainly in lower levels and pbl ; that the high value of the whole - level apparent heat source < q1 > is near the area of large rainfall in the direction of northeasterly - southwesterly agreeable to shear line very well and the condensation latent heat releasing is main heat source with vertical advection item playing key role in q1 and q2 ; that there is a vertical secondary circulation crossing low - lever jet whose ascending branch is at the area of large rainfall ; that the construction of convection instability and conditional symmetry instability results that there is not only deep thermal instability, but also moisture influx and triggering mechanism of thermal instability causing strong torrential rain

    作為對比，本文還對2002年6月24 - 25日發生在北京地區的強地形雨進行了分析，並討論陜南、北京地區兩地暴雨的異同點以及地形作用的共性和個性，為兩地暴雨預報提供有益的參考，得出了一些很有意義的結果： 1大尺度環流背景分析表明： （ 1 ） 「 02 . 6 」強降水與6月上旬越赤道氣流和季風爆發密切相關，攜帶大量水汽的偏南氣流與冷空氣於6月8日交匯在西北地區東部，導致了這次強降水的發生； （ 2 ） 200hpa的副熱帶西風急流、 500hpa副高以及850hpa的低空急流的配置非常有利於本文分析之陜西強降水的發展與維持。大尺度形勢分析表明，東高西低形勢場、低空急流的建立和高低空形勢的配置決定了這場降雨出現在西北地區東部。與暴雨區相聯系，存在一支橫越低空急流的經向垂直環流，暴雨區處于該垂直環流的上升支； （ 3 ）偏南和偏東氣流水汽通道在西北地區東部交匯，水汽的輻合積聚主要在對流層低層和行星邊界層內完成； （ 4 ）整層的視熱源< q _ 1 >高值區在暴雨區附近呈東北-西南向分佈，與切變線走向非常一致，降水產生的凝結潛熱釋放是強降水區大氣的主要熱源。
  3. The result of calculation shows that in that flood season of 1999, the flow of baini channel in networks was reciprocating flow for common ; it was in the extreme case of the storm surge, and affected by extreme velocity and topography, the flow in baini channel course and was rocking crookedly, this demonstrating the instability flow phenomena

    計算結果顯示，在99年洪季時，河網內白坭水道流動為通常的往復流動；但在風暴潮極值狀態下，由於受極值流速及地形的影響，流動在白坭水道中彎曲扭擺，呈現出流動不穩定現象。
  4. The results show that there are two centers of occurrence of llsw respectively in dong bei and jiang nan ; the regional torrential rain over the yangtze river basin is closely associated with llsw during the major periods of heavy rainfall ; the diurnal variation of the number of occurrence in the middle and low reaches of the yangtze river is the strongest in china there are some significant differences between llj and nallsw in positive season, spatial variation, diurnal variation and field of pressure. by the way, the important effect of inertial stability on heavy rainfall with both low level south - westerly jet and high level northerly strong flow is analyzed theoretically. the results show that the existence of the maximum of inertial stability in the left font of the low level jet is favor of the accumulation of the moist thermal energy, and conditional symmetric instability or convective instability can be expected in this region

    另外，慣性穩定性的作用以往不受重視，本文通過對西南低空急流左前方和高空偏北大風軸右後方的慣性穩定性和對稱穩定性的理論分析和實例計算，表明慣性穩定性在伴有高低空急流的暴雨中有重要意義，揭示了梅雨暴雨的一種新的高低空急流耦合機制：低空急流左前方慣性穩定度大值區的存在，有利於低層濕熱能量的積累，使低層傾斜對流的不穩定發展更多期望于條件性對稱不穩定或對流不穩定；高空偏北大風軸（西風急流）的存在，是其右後方（右側）出現對稱不穩定的有利條件，高空相對容易出現干對稱不穩定；慣性穩定性的作用，使低層的傾斜對流更偏向於垂直方向，有利於對流發展，使高層的傾斜對流更偏向於水平方向，有利於高層輻散。
  5. Experimental research on the hydrodynamic instability of fiber suspensions in channel flow

    槽道纖維懸浮流穩定性的實驗研究
  6. The two - dimensional axisymmetric subsonic - transonic - supersonic flow in an experimental arcjet thruster is simulated numerically using flux vector splitting method. the profiles of density, velocity, temperature, pressure and mach number can be obtained by the computation. the computation grid and some computed results are given here. the test equipment such as power supply system, ignition system, propellant supply system, arcjet thruster, thrust measuring device and vacuum system are introduced briefly. some working phenomena of the arcjet are observed and discussed. three different kinds of instability appeared in the process of the experiments. except some important parameters are measured, it is found that the operating stability of argon is better than that of nitrogen

    對一實驗電弧加熱式發動機二維軸對稱亞跨超音速流動進行了數值模擬，所採用的方法是矢通量分裂演算法.通過計算可以得出密度、速度、溫度、壓力和馬赫數的分佈.給出了計算所使用的網格和一些計算結果.簡要介紹了實驗所使用的設備，如電源系統、點火系統、推進劑供給系統、電弧加熱式發動機、推力測量裝置和真空系統.對所觀察到的一些工作現象進行了討論.有三種不同的不穩定性出現于實驗過程.除了所測量的一些重要參數，通過實驗發現氬比氮工作更穩定
  7. On the base of the fujian power system that has the special configuration of " large power generator with small power system " in 2000, constructs power system models of fujian and fujian interconnected with other parts, does a lot of calculation and analysis and simulation, researches the security mechanism and rule of the fujian special power system interconnected with large power system. the above connection can keep security and stability and can make obvious benefits, but when the transmission power reach to excessive quantity the main power grid will increases interconnected flow - in or flow - out exchange power load. the power operation state tended to instability ; the infirmable interconnection make s the damp infirmable

    本文以2000年前後具有「大機組小電網」特殊結構的福建電力系統為背景，建立了福建電力系統及其與外部互聯的數學模型，開展大量的模擬計算分析，研究了「大帆組小電網」電力系統與大容量電力系統互聯偏弱的安全穩定性的機理和規律：前述互聯可以安全穩定運行，取得顯著效益，當傳輸功率達到一定量后，主網架增加了送出或吸收互聯交換功率的負載，系統運行狀態向穩定性水平有所下降的方向轉移；聯絡偏弱使阻尼偏弱，聯絡線小幅低頻振蕩和大幅低頻振蕩易被激發，聯絡線一旦重載斷開，系統高周或低調嚴重。
  8. In this study, the effect of rotating elliptical inner cylinder on the instability of flow field, the relationship between azimuthal wave speed and the angular speed of inner cylinder, and the so - called ' hysteresis ' will also be investigated experimentally

    本文主要目的除了藉由實驗比較橢圓與圓形截面內柱兩種系統加速過程中不穩定發生時機、流場流況的差異外；對于所謂的遲滯現象于兩系統中的發生過程亦將探討，此外內柱幾何形狀所造成高階不穩定於圓周方向的波形相速度變化，也是本文的探討重點。
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