lift drag 中文意思是什麼

lift drag 解釋
誘導阻力
  • lift : vt 1 舉起，使升起，提起，抬起；提高；提升。2 使高尚；鼓舞。3 運送，搬運；空運 （ ＝ airlift） 4 ...
  • drag : vt （ gg ）1 拖，曳；拖動，拖著（腳、尾巴等）；硬拖（某人）做（某事）[至（某地）]。2 打撈，（用撈...
  1. With the ground effect, they own higher lift / drag ratio than general aircraft, so need less thrust power and have the ability to carry more loads or fly longer

    在地效的作用下，它的升阻比比一般的飛機大，因而飛行時所消耗的推進功率小，具有更大的載重量或航程。
  2. The method of wing shape optimization of space shutlle has been developed with penalty function approach in which the objective function is the mass of the wing and the constraints are the hypersonic re - entry flight cross range, lift / drag ratio, and subsonic flight lift / drag ratio, the margin of the longitudial static stability and the magnitude of the horizontal landing speed etc

    摘要介紹了在滿足高超音速再入橫向機動航程，高超音速再入飛行時的升阻比，亞音速進場飛行時的升阻比，縱向靜穩定性裕度和水平著陸速度等飛行性能設計要求下，用罰函數法尋求使航天飛機機翼質量為最小的外形優化方法並給出了算例。
  3. The aerodynamic characteristics of a projectile with wrap around fins are studied systematically in this paper, as follows : 1. the lift coefficients 、 drag force coefficients 、 pitch moment coefficients 、 pitch damping moment derivatives and roll damping moment derivatives are obtained from engineering calculation through looking wrap around fins as flat fins of the same projection aera

    本文對某卷弧尾翼彈氣動特性進行了系統研究，主要內容與結論為: 1 .將卷弧翼按照相同投影面積的平板翼進行工程估算，得到升力系數、阻力系數、俯仰力矩系數、俯仰阻尼導數、滾轉阻尼導數曲線。
  4. The effect of reynolds number on rudder hydrodynamic performance is also analyzed. up to the stall angle the computed lift and drag agree well with measurements and other author ' s calculations, whereas stall angle, lift and drag beyond the stall angle are slightly under - predicted. the solver is used to investigate laminar and turbulent separated flows around a 6 : 1 prolate spheroid at high incidence angles and their effects on hydrodynamic forces

    應用所開發的求解器，以naca0015翼型舵為算例計算了船舵在不同雷諾武漢理三;大學博士學位論文數下大舵角范圍內的三維粘性流場及水動力，成功地預報了舵的失速角和最大升力，並初步探討了雷諾數對舵水動力的影響;計算結果與現有試驗和計算數據比較，吻合程度相當好，初步檢驗和驗證了該求解器精確模擬粘性流動和計算水動力的能力。
  5. Much more increase of maximum lift - to - drag ratio can be obtained with a forward - swept main wing with a small sweepback angle leading edge

    主機翼前掠角較小時，鴨翼改善和提高陞阻比的效果比較明顯。
  6. Air foil surfaces, lift - and - drag coefficients

    空氣流經表面抬升和牽引的系數
  7. Air foil surfaces, lift - and - drag coefficients.

    空氣流經表面抬升和牽引的系數. .
  8. As guffey notes, “ a long, slender wing, by its nature, would be lightweight and would provide very good lift and drag characteristics

    高非指出：窄長的機翼本來就比較輕，升力和阻力的特性也相當優異。
  9. The results show that the frame of the grid fin has the greatest effect on the grid fin drag characteristics, reducing the drag levels and enhancing the lift - drag ratio for grid fin may be obtained by selecting appropriate frame cross - section shape and thickness of grid fin

    計算結果顯示，格柵翼的幾何結構參數對格柵翼的氣動力特性影響很大，格柵翼的邊框剖面形狀和厚度對格柵翼的阻力影響最大，所以選擇合適的邊框厚度和剖面形狀可以有效地減少格柵翼的阻力，提高陞阻比。
  10. The performance of next generation maneuverable missile was predicted by taking into account its important parameters such as lift to drag ratio, empty weight to total weight ratio and effective load

    在考慮導彈空重、有效載荷和氣動特性的情況下，預測了未來先進飛航導彈的性能。
  11. An upper canard, which is in the vicinity height of forward - swept main wing, could improve the maximum lift - to - drag ratio

    高於主機翼的鴨翼對最大升阻比的改善較多，但也不宜過高。
  12. Lift - drag of towed vehicle

    拖曳體升阻比
  13. He ' s mastered the cable steering system. the drag - and - lift ratio

    他掌握了纜索操縱系統拖拉和提升的比率
  14. According to dynamical characteristic of the bubble motion in the flow field, and under the assumptions of isothermal system without interior heat source, uniform bubble size, and ignoring surface tension, the mathematical expressions for interfacial momentum exchanges have been deduced which include drag, virtual mass force, and lift

    針對氣液泡狀流中氣泡運動力學特性，在系統絕熱、無內熱源、忽略表面張力、氣泡尺寸均一前提下建立了氣液相間曳力、虛質量力、升力的數學模型表達式。
  15. Looking at the lift formula, you can see thatlift and drag vary directly with the density of air

    你只要看一看升力公式就可以了解升力和阻力與空氣密度成正比。
  16. A variable control surface on the trailing edge of an aircraft wing, used primarily to increase lift or drag

    襟翼飛機后翼上最初用來增加上升力或拖力的可靈活控制的輔助翼
  17. Canard wing increases lift coefficient with the penalty of the increase of drag coefficient

    低於主機翼的鴨翼將加強前掠翼布局的緩失速特性。
  18. They achieve the desired result by reducing the lift and increasing the drag on the side where the spoiler is raised.

    由於擾流器打開的一側升力減小而阻力增加，從而達到所要求的效果。
  19. Based on the mechanism of slipstream interaction, described in this thesis is firstly the interaction of the propeller slipstream with the wing 、 fuselage and horizontal tail. subsequently, the changes in lift 、 drag and pitching moment are derived, giving an engineering model for the prediction of the increments in the aerodynamic characteristics caused by the interference between the propeller slipstream and the other parts of aircraft. this method offers a powerful means to the calculation of the aerodynamic interaction between the propeller and the aircraft, providing reliable data for the design of and aerodynamic calculation on propeller - powered aircraft

    本文以滑流干擾的機理為出發點，研究了螺旋槳滑流與飛機機翼、機身、平尾組合體之間的相互影響，推導出滑流引起的飛機升力、阻力和俯仰力矩的變化，給出了滑流干擾對機體氣動特性影響的工程估算方法，為研究螺旋槳與飛機部件之間的相互干擾提供了有力的工具，為以螺旋槳發動機為動力的飛機的設計和氣動計算提供可靠的依據。
  20. In this paper, in order to find the approaches to reduce the drag levels and enhance the lift - drag ratio for grid fin, the aerodynamic characteristics of the grid fin are calculated with tvd finite volume scheme and wind tunnel tests. according to the complex flow field, a curve - long parameter grid generation technique is applied, and the density of the grid is processed

    為適應復雜流場的數值計算，對網格生成方法進行了研究，採用弧長網格生成法進行貼體網格生成，並對網格進行了加密處理，使物面附近網格盡量密些，而在遠場使網格盡量稀疏些。
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