尾流系數 的英文怎麼說

中文拼音 [wěiliúxìshǔ]
尾流系數 英文
wake coefficient
  • 流 : Ⅰ動1 （液體移動; 流動） flow 2 （移動不定） drift; move; wander 3 （流傳; 傳播） spread 4 （向壞...
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. The thesis built the relation between containing water and the properties of trail dam ' s soil by geomechanical properties of trail dam ' s soil ; analysed the seep rule of water in the trail dam ' s field and the change of soakage line. the thesis applied the limited element to analyze the trail dam of baogang by the engineering item in production. it calculates the dynamic and static response about the dam using the numerical simulation method

    本文通過大量的尾礦土物理力學性質試驗資料，建立了含水量與尾礦土性質之間關系曲線；分析了水在尾礦壩區的滲流規律和不同標高時浸潤線的變化情況，為分析尾礦壩的穩定性提供依據；結合生產上的工程項目，從包鋼尾礦壩的穩定性研究入手，應用有限元法，通過數值模擬分析了水對尾礦壩的靜力、動力穩定性影響。
  2. In this paper, some characteristics of flow movement and sediment transport are analyzed by using the flume experiment data. the cross section of compound channel can be divided into four regions : the undisturbed region in main channel, the interactive region between channel and plain, the undisturbed region in flood plain and the boundary region. in the undisturbed regions, the distribution of longitudinal velocity along the depth has the feature of lograithmic. whereas, in the interactive region, the longitudinal velocity does not obey the logarithmic distribution law, but it can expressed as a revised logarithmic function by using a wake function. on the basis of the kinematic equation the velocity distribution of transverse velocity is obtained. in the boundary region, the longitudinal velocity obeys the law of parabolic distribution. furthermore, according to the simplified diffusion equation, the transverse distribution of sediment concentration in the interactive region is deduced. the analysis is in good agreement with the measured data

    本文根據漫灘水流的運動特點，將漫灘水流的復式斷面分為主槽平衡區、灘槽交互區、灘地平衡區及邊壁區等4個區，並給出了各區寬度的經驗公式.根據灘槽交互區垂線流速分佈的變化特點，提出了附加尾流函數的對數流速分佈公式.在簡化水流運動方程和泥沙擴散方程的基礎上，對灘槽交互區內垂線平均流速及含沙量沿橫向分佈進行了理論分析，提出了反映灘槽水流動量交換強度的橫向渦量粘性系數及橫向擴散系數的表達式，得到了漫灘水流垂線平均流速及含沙量沿橫向分佈的解析解，並與實測資料吻合較好
  3. The results indicated that the generation of trailing - vortex of downstream adjacent vanes could be restrained effectively by upstream wake when the passing frequency and the amplitude of wake defect satisfy some conditions, associated with a significant enhancement of time - averaged aerodynamic performances : loss coefficient reducing 40. 2 % and the ratio of loading coefficient and loss coefficient increasing 93 %

    研究表明：滿足一定通過頻率和虧損幅值條件的尾跡能夠有效抑制下游相鄰葉排尾緣渦的生成，達到控制或是推遲附面層非定常分離的目的，從而使得流場時均性能大幅度的提高，損失系數降低了40 . 2 % ，功損比增加93 % 。
  4. Numerical simulation of unsteady vortex in the wake of cascade flow

    葉柵流場尾跡中非定常渦系的數值模擬
  5. In arbitrary curvilinear coordinate systems, three dimensional turbulent combustion flow fields of the three kinds of turbofan engine afterburner with the longitudinal heat shield 、 outer cold flow and the jet nozzle are simulated. the three - dimensional body - fitted grids are generated by an elliptical grid generation procedure and zone method

    本文在任意曲線坐標系統下對三種帶有縱向隔熱屏、外冷卻通道和尾噴管的渦扇發動機加力燃燒室的三維紊流燃燒流場進行數值模擬。
  6. A parameter has been defined to account for both the heat transfer enhancement and pressure loss caused by different shapes and configuration of pin fin arrays and the optimization analysis shows that cube - shaped pin - fin arrays can be viable alternatives for pedestal cooling in a blade trailing edge

    本文提出了一個強化換熱有效性系數來綜合考慮擾流柱換熱和壓力損失的效果，並用它對各種擾流柱進行了優化分析，優化結果表明方形擾流柱排在渦輪葉片尾緣區冷卻結構設計中是優先考慮的一種結構型式。
  7. The results are compared with the cases in a single - layer fluid, showing that the density stratification can have a relative large effect on the drag and lift coefficients as well as the vortex shedding

    計算受迫振蕩圓柱體的升力系數、阻力系數隨時間的演化曲線和圓柱體的尾渦分佈，以及圓柱體的受迫振蕩激發兩層流體內界面的擾動，並與均勻流體的情況進行了比較分析。
  8. This research established an estimating model of pinus massoniana stand volume with the elements as variates directly obtained from rs and the conditions of stand that were extracted from 130 samples of pinus massoniana stand from the fifth forest resource continuous investigation data in min - jiang watershed and flitered by the thrice standard deviation method and liner regression method and the correlation coefficient is 0. 735 the suitability and precision of the model were tested and regression analysised with data that were extracted from another 30 samples

    摘要從福建省第5次森林資源一類調查落在閩江流域的樣地中抽取馬尾松林樣地130個，以rs可提取因子及樣地林分立地條件因子為可選變量，利用3倍標準差法進行異常數據的篩選，對林分立地條件定性因子進行數量化處理，通過逐步回歸構建閩江流域馬尾松林分蓄積量估測模型，研究結果所構建的蓄積量估測模型的相關系數為0 . 735 。
  9. 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。
  10. Then a laplace equation can be deduced and through computation, the blade profile coordinates and geometry of the cascade result from an analytical solution. next, an optimization method, taking the geometry parameters of the unclosed profile as its objective functions, is used to obtain an optimized blade profile. and last, the optimized profile is refined with round arcs added in the leading and trailing edges

    本文採用的勢、流函數解析法法中，將無旋方程用新的類無旋方程替代，這樣在計算域上得出速度場的解析關系式，計算得出初始葉型；然後以此初始葉型的幾何參數，例如前尾緣的封閉程度和葉型彎角等為目標函數，通過優化程序對初始速度進行自動調節直到目標函數值最小為止。
  11. The principal contributions of this dissertation are : 1. a high fidelity and real - time rotor wake inflow model was built up. based on peters - he finite states wake theory, a new influence coefficient matrix for high speed flight was derived, the modified wake model is better suitable for the flight state with a large wake skew angle

    本模型以peters - he有限狀態尾跡理論為基礎，修正了大尾跡傾斜角時的誘導速度影響系數矩陣，並結合了王氏渦流理論，導出了旋翼誘導速度垂向分量和旋轉分量的表達式，可計算平尾、尾槳和垂尾氣動中心處誘導速度各分量。
  12. 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。
  13. A kind of grid generation method based on two - dimension poisson equtions is devlop - ed into the grid generation method based on three - dimension poisson equtions in this dessertation. use this method, this paper generals the grids of glide bullet to increase range that is at three states, that is with no control rudder and no tail wing, only with tail wing and with control rudder and tail wing. this paper has calculated the aerodynamic coefficients of glide bullet to increase range that is at three states. beside this the paper has given the results and analysised the differences of the three states, and the effects of control rudder and tail wing to the lift and drag. this can give us some information about the ability of the control ruder and tail wing for increasing the range

    本文在二維泊松方程網格生成方法的基礎上推導出了一種三維泊松方程網格生成方法。並利用該方法生成了繞彈體、尾翼彈、滑翔增程彈三種不同彈形的流場網格。計算了超音速來流下彈體、尾翼彈，滑翔增程彈三種不同彈形的空氣動力學系數，分析了三種不同彈形計算結果的差別；分析了控制舵和尾翼對升力和阻力的影響。
分享友人
分享到 Line

分享到臉書