wake pressure 中文意思是什麼
wake pressure
解釋
尾流壓力-
Based on an engineering background, through numerical simulation of the flow field in the hp turbine of the energy efficient engine ( e3 ), the article research the unsteady flow in a transonic turbine stage, the unsteady phenomena in the stage include the shockwave, wake, shedding vortex, endwall vortex, passage vortex and leakage vortex, etc. there are two shockwaves generated on the vane the tailing edge, one on suction side is named moving shockwave, and name another on pressure side steady shockwave
本文首先對于研究的意義和國內外研究的現狀做了簡要的介紹，再從某工程背景出發，通過對e3發動機高壓渦輪內流場的數值模擬，研究了干涉的周期性的問題，以及渦輪級內常見的非定常現象：激波、尾跡、脫落渦、根腳渦、通道渦、漏流渦。導向器尾緣會出現兩道激波，在吸力面的激波可稱為「運動」激波，壓力面的激波可稱為「定常」激波。 -
The pressure to succeed is intense as the teens come from impoverished rural areas with parents who never made it past junior high. the students wake at dawn to memorise math formulas and propaganda slogans while teachers roam classrooms to keep exhausted students awake
為了報答在鄉間只有小學程度的父母的栽培，他們由早到晚在課室內由老師鞭策，不停背誦數學方程式和共產口號，壓力令這班年輕人都喘不過氣。 -
The main work in this paper includes three parts : the theory research on partially - cavitating and super - cavitating axisymmetric bodies, the numerical computations and experimental investigations on partially - cavitation and super - cavitation on axisymmetric bodies. after finishing the study of theory and experiment on the partially - cavitation and super - cavitation for axisymmetric body, i use the potential flow theory to build the mathematical model on the partially - cavitation and super - cavitation for axisymmetric body. many cavity wake models, such as pressure recovery close model, riabouchinsky model and re - entrant jet model, are studied seriously
本文在深入研究了回轉體局部空化與超空化理論及實驗結果的基礎上，基於勢流理論，建立了回轉體局部空泡和超空泡流場的基本數學模型，通過對kinnas和fine 、 uhlman以及jiedang和gertkuiper等人基於二維水翼提出的壓力恢復閉合模型、鏡像板模型和回射流模型等空泡尾流模型進行了逐一的研究分析，發現其中的壓力恢復閉合模型較適用於模擬回轉體空泡尾部流場，並選用此空泡尾流模型作為求解回轉體空化流場正問題與逆問題的數學模型的組成部分。 -
Flow separation produces pressure fluctuations of large amplitudes, possibly with the dominant frequencies differ from up - stream blade wake passing frequency and its harmonics
尾緣氣流分離產生的壓力波動頻譜中含有上游葉片尾跡頻率及其倍頻的分量，但其頻譜可能比較復雜，並非單一地受上游葉片尾跡影響。 -
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。 -
And the results of the wake length, separation angle, and drag or pressure coefficient for low reynolds number are excellent agreement with previous experimental and numerical results
得到的低雷諾數下的迴流長度、分離角、阻力系數、壓力系數和現有的試驗或數值結果相比，都能良好吻合。 -
An experimental study on the aerodynamic characteristics of new concept car is conducted by model wind tunnel test, covering the pressure coefficient and wake vortices on longitudinal symmetry plane, as well as aerodynamic forces and moments under different yaw angles
摘要用模型風洞對新概念車在不同橫擺角下縱對稱面上壓力系數、整車氣動力和氣動力矩的變化以及縱對稱面尾部流態分佈進行了試驗研究。 -
In order to understand the rotor / wing interaction each other, firstly, the change of the isolate rotor thrust with the collective pitch and rotate speed is tested, secondly, the change of the rotor thrust with the collective pitch, rotate speed and the wing / rotor distance is scaled, when the wing is placed underside the rotor, lastly, the pressure on the wing due to the rotor wake is scaled
為了搞清楚它們之間的相互影響，本文首先測量孤立旋翼的拉力隨總距和轉速的變化；再測量有機翼時旋翼的拉力隨總距及轉速的變化以及隨旋翼機翼間的距離變化；最後測量旋翼尾流對機翼表面壓力的影響。 -
On the rotor blade pressure surface, the dominant frequencies of unsteady surface pressure are the up - stream blade wake passing frequency and its harmonics, and the amplitudes of pressure fluctuations decrease from leading edge to trailing edge
轉子葉片吸力面非定常壓力受葉片附面層和上游葉片尾跡共同影響，其主導頻率為上游葉片尾跡頻率及其倍頻，但是在吸力面前部氣流加速區壓力波動幅度沿流向增大，而在吸力面後部氣流減速區壓力波動幅度沿流向減小。 -
The result shows that the pressure distribution on the cylinder and the wake are modified, and the separate flow partially is attached to the surface again
相鄰微作動器存在相位差時，圓柱上下表面壓力系數的差值發生改變，進而使繞流圓柱的氣動性能發生變化。 -
Yi gang, an assistant governor of the people ' s bank of china, speaking at a forum in beijing at the weekend, contrasted china ' s five rate rises this year, to fight inflation, with the downward pressure on us rates in the wake of the subprime crisis
中國人民銀行行長助理易綱在上周末北京舉行的一個論壇上發表講話，將今年中國五次上調利率以應對通脹，與美國利率在次貸危機之後所面臨的下行壓力進行了對比。 -
The relationship between the non - dimensional drag coefficient of sma plate face and time is presented, and the pressure distribution on and around the sma plate surface as well as the karman vortex configuration in the wake at a certain time are given
給出了形狀記憶合金薄板表面的流體無量綱阻力系數隨時間的變化關系，同時給出了某一時刻薄板表面及其周邊的壓力分佈和薄板尾跡中的卡門渦街形態。
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