氣動阻力 的英文怎麼說
中文拼音 [qìdòngzǔlì]
氣動阻力
英文
aerodynamic drag force-
Various aerodynamic devices, as well as passive dampers and serve dampers, are available.
各種空氣動力裝置以及無源阻尼器和伺服阻尼器是可用的。Abstract : apply computer simulation to the distribution pattern of air - flow without considering the cold condition of the combustion and compare the flow patterns under different designed circumstances. and the effect of the design of the partition in the air way of the burner on the flow and mixture of gas and air is especially studied. the result shows that the design of partition plays a very important role in strengthening the mixture of gas and air, but increases the loss of the resistance in the air way and the total pressure of the air way in same working conditions needs increasing
文摘:應用計算機模擬的方法,在不考慮燃燒的冷態情況下,研究了熱風爐燃燒室內的氣流分佈規律.在此基礎上,比較了2種不同設計方案的氣流流動特徵,尤其是研究了燃燒器空氣通道內阻流板的設置與否對空氣和煤氣的流動和混合的影響.結果表明,阻流板的設計對加強空氣和煤氣的混合有著極為重要的作用,同時也增加了空氣管道的阻力損失,在同樣的工況條件下需要提高管道系統的總壓力Research on confluent local resistance of multi - power sources in the exhaust system for residential kitchen
住宅廚房排煙氣系統多動力源合流局部阻力研究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。The paper has founded the model of laser transmission in launch process and the movement model of laser - powered vehicle, and has analyzed the influence on performance of launch system, which was raised by some factors, for instance, the performance of thruster, the attenuation in transmission, the height of mode - transform, the laser power, the air drag force, the launch height, and so on
本文研究了激光推進微小衛星發射系統的概念和性能。建立了發射過程激光傳輸和激光推進運載器運動模型,分析了推進系統性能、大氣傳輸衰減、模式轉換高度、激光器功率、大氣飛行阻力、發射點高度等因素對發射系統性能的影響。Proceed from the angle of energy and taking considerations on interference factor and drag of airfoil profile, a kind of new typed calculation method on the design of vane air foil was put forward according to the vortex aerodynamics model of the rotor of wind turbines with horizontal axis
摘要根據水平軸風力機轉子的渦流氣動模型,從能量的角度入手,考慮干涉因子和翼型阻力,提出了葉片翼型設計的一種新型計算方法。Several icing parameters were imported to calculate the change of drag coefficient and typical derivatives between clean aircraft and iced aircraft, and the aircraft flight envelope change of iced and un - iced situation was computed, and the small disturbance flight dynamics model was modified to study the effect of the ice accretion on the aircraft dynamics by importing the ice parameter to it, and the longitudinal and lateral stability and the elevator, aileron and rudder step response were also studied and simulated
根據這些參數計算了飛機結冰后阻力系數以及典型氣動導數的變化,並計算了結冰前後飛機的飛行包線;同時對結冰前後飛機的縱向、橫側動穩定性以及升降舵、副翼和方向舵階躍操縱響應進行模擬計算。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。Results show that all the geometric parameters have remarkable effects on combustion performance ; the swirl of intake air generated by skew intake holes enhances fuel - air mixing, minimizes dead zone and stabilizes the flame with reverse flow, but the excessive reverse flow can cause overheat in combustion chamber and exhaust ; the consistency of flow resistance in intake and exhaust system is conducive to the stability of heater performance
研究表明,燃燒室進氣孔的孔徑、孔數、孔的分佈及方向等均對燃燒性能影響很大;斜孔所產生的旋轉進氣,雖具有強化燃氣混合、消除死區和迴流穩焰的作用,但迴流過度會使燃燒室及排溫過高;保證進排氣系統流動阻力(壓力)的一致性,有助於保證加熱器性能穩定。Maintain correct tyre pressure by inspecting your tyres regularly and inflating them to the pressure recommended by the manufacturer
保持正確輪胎氣壓:維持適當的輪胎氣壓以減低滾動阻力;定期檢驗輪胎,並確保輪胎氣壓達到製造商建議的水平。A labyrinth seal is a non - contacting circumferential seal utilizing a tortured path for flow between the stationary and rotating ( or reciprocating ) parts. the design utilizes a series of pressure drops to reduce the leakage
迷宮密封是一種通過曲折通道增大流動阻力來實現封嚴的非接觸密封,通常用於密封氣體,廣泛應用於航空、能源、流體等領域的動力機械中。Air churning resistance
空氣擾動阻力Numerical simulation of the flow resistance in twc with guiding components
天然氣汽車均流三元催化器內流動阻力特性An experimental study on the square - formed fences used for reducing the drag on steyr van truck
廂式貨車減小氣動阻力的實驗研究The flight test of ec155 tells us that inter - blade dampers can work very well in stabilizing the system ; another advantage of this configuration is it can make the hub system simpler and reduce the drag of air to the hub which is very important for helicopters with 4 or more than 4 blades
Ec155的飛行試驗證明,這種減擺器布置方式對提高穩定性效果明顯;這種布置方式的另外一個優點是可以簡化槳轂,降低其氣動阻力,對多槳葉(四片和四片以上)直升機有重要意義。With the favor of these techniques, the static pressure distribution along the length and the velocity profile at the mini - channel exit were obtained. with the data of more than 500 flow states based on 13 kinds of mini straight rectangular channels that their heights were 0. 5mm and 1. 0mm, the effects of characteristic scale, surface roughness and the aspect ratio of rectangular on the characteristics of flow resistance of mini straight channels were studied
採用在沿程測量氣流靜壓分佈、在出口測量速度分佈的方法,對高度0 . 5mm和1 . 0mm的13個微小直矩形通道的500多個狀態流場進行了測量,研究了特徵尺度、表面粗糙度、橫截面寬高比等因素對微小等直通道流動阻力特性的影響。What the students will actually show is the net ( resultant ) motion on the student, which is the unbalanced geometric sum of all of these forces
如學生玩滑梯,同時存在向下的重力,滑梯產生的舉力(與表面垂直並向上)和阻止身體向前運動的摩擦力和空氣的阻力。Motor vehicles need energy to accelerate ( overcome inertia ), to push the air out of their way ( aerodynamic drag ), and to overcome the friction from tires, wheels and axles ( rolling resistance )
帶發動機的車輛需要能量進行加速(克服慣性阻力) ,推開路上的空氣(空氣動力學拖曳力) ,並克服輪胎、車輪和車軸的摩擦力(滾動阻力) 。Since frosting is inevitable so long as some physical factors are satisfied, it will enlarge the resistance of airflow, cut down the airflow rate of air cooler and reduce the coefficient of heat transfer. in order to keep the refrigeration system run smoothly, frost must be removed
結霜只要滿足一定的物理條件就是不可避免的,霜層增厚增加了空氣的流動阻力,冷風機盤管流量減少,同時霜層增厚也會導致傳熱系數下降,因此為保持系統高效運行,除霜是必須的。In addition, aerodynamic stiffness and aerodynamic damping on the system are already obtained in the condition of fluid - structure interaction. it is known that aerodynamic loads are associated with blade vibration. the systematic eigenvalues are used to judge whether the flutter occurs so as to find the stable operating range of a wind turbine
本文把風力機葉片簡化為懸臂梁,對梁截面的二維葉型建模,完整推導了二維葉型的線性運動微分方程和流構耦合條件下系統的氣動剛度和氣動阻尼,此時氣動載荷與結構的位移矢量以及速度矢量是相互耦合的,再利用系統的特徵值來判斷葉片顫振是否發生,從而獲得風機的穩定工作范圍。分享友人