drag characteristics 中文意思是什麼

drag characteristics 解釋
阻力特性
  • 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...
  • characteristics : 產品性能描述
  1. 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。
  2. 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。
  3. 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。
  4. According to the spread of nappe and relation between the nappe and depression, oblique - thrust fault zone was divided into three parts in this paper : sertengshan, lvliangshan and xitieshan. ( 3 ) according to macroscopic characteristics of fault zone, cleavage characters of fault zone, drag folds, the reverse " s " fold in the footwall, positive flower structures and small left strike - slip fault, the kinematics characters of fault zone of sertengshan - xitieshan are concluded : thrusting in section, left - slip fault in plane and the strike - slip displacement increasing from the west to the east

    （ 3 ）根據斷裂斷裂帶的宏觀特徵、斷層帶劈理特徵、斷裂帶附近的牽引褶皺和斷層下盤的平面反「 s 」型褶皺以及斷層上盤剖面正花狀構造和平面左行小型平移斷層，認為賽什騰-錫鐵山斷裂帶運動學主要表現為剖面上的逆沖、平面上的左行走滑特點，並且走滑量具有自西向東增大之勢。
  5. The results show that the drag of grid fins is little affected by width to chord ratio, the normal force of grid fins was large, and that the smaller was the ratio, the better was the characteristics of the grid fins ' s normal force in tested sizes of width to chord ratios

    結果顯示，在所選擇的格寬翼弦比范圍內，格寬翼弦比對阻力的影響不大，對法向力有明顯的影響，格寬翼弦比越小法向力特性越好。
  6. Drag force characteristics and calculation of water flow around pile

    樁柱水流繞流阻力特性及其計算
  7. 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。
  8. In addition, drag reduction characteristics in the transition regime of channel suspensions are studied

    最後應用穩定性分析結果分析槽流懸浮流失穩階段的減阻特性。
  9. 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。
  10. The 3d turbulent flow fields around high - speed trains of four kinds of model uain have been calculated by 3d parallel compute program coded with the algorithms presented in this thesis. from the calculation results, the aerodynamic drag of different types of model trains are obtained, some characteristics of the flow field over the high - speed train are analyzed preliminarily such as pressure distribution and diversification, velocity distribution and diversification, and the affections of different train head shape to pressure. velocity, pressure gradient and the like

    用三維并行計算程序模擬了四種不同高速列車車型的外流場，獲得了不同車型的運行阻力；詳細分析了列車附近流場的壓力分佈及其變化情況，討論了列車頭型對列車通過時產生的壓力波動的影響；分析了四種車型外部流場的速度分佈規律及其變化情況，分析了列車頭部形狀對它們的影響。
  11. Under the drag of trailer, it impacts the ground periodically and brings strong shock wave, which spreads to deep underground and has transfer characteristics of seismic wave

    在牽引機拖動下，周期性地沖擊地面，產生強烈的沖擊波，向地下深層傳播，具有地震波的傳遞特性。
  12. Moreover, this paper investigates the influences of surfactant aqueous solutions on flow characteristics of a mmc. sodium dodecyl sulphate aqueous solution and alkyl polyglycoside aqueous solution are used as working fluids. the experiment results indicate that the drag reduction depends on flow velocity and temperature ; the drag reduction effects aren ’ t very obvious in laminar flow region, but when fluid enter turbulent flow region, the drag reduction increase notably, the drag reduction effects

    研究結果表明，阻力減小率（ dragreduction ， dr ）與流速和溫度有關;層流區內表面活性劑的減阻效果不是特別明顯，但進入紊流區后減阻效果開始增強，尤其進入旺盛的紊流區后減阻效果大大增強;溫度提升也可增加dr ，但在溫度較高時添加sds后減阻效果的改善卻不及apg 。
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