翼果的 的英文怎麼說
中文拼音 [yìguǒde]
翼果的
英文
pterocarpous qwwnyc-
Samara a nut or achene whose pericarp is extended to form a wing for wind dispersal, e. g. ash ( fraxinus excelsior )
翅果:指堅果或瘦果中果皮延伸成翼狀,以利於風媒傳播的果實類型。如白蠟樹的果實(歐洲白蠟樹) 。If this load centroid is behind the elastic axis of the wing structure, then a nose-down twist of the main wing surface results.
如果該載荷重心在機翼結構彈性軸之後,則引起主機翼表面前端向下的扭轉。The results show that : 1 ) though the water environment of nanyisan is more muddy than others, algal can still grow ; 2 ) the composition and rock type of the algal limestone are complex, the main rock types include lettuce - like stromatolites, algal reef, digitate stromatolies, wave - like stromatolites and so on ; 3 ) the deposits of algal limestones were formed in low - energy peritidal to subtidal high - energy environment of lakeshore slopes, sliding under the action of gravity and some other factors and become slump mixosedimentite layers ; 4 ) the physical property of algal limestones layers is better than others ; 5 ) the genetic development of the sediment decides that the single deposit is small, distributive and thin - layed
結果表明,南翼山藻灰巖沉積水體環境相對渾濁,但藻類仍能生長;該區藻灰巖巖石組成及類型復雜,主要的藻灰巖巖石類型有包心菜狀疊層石、藻礁、指狀疊層石、水平波狀疊層石等;其主要為濱岸斜坡上低能潮上環境至高能潮下環境形成的沉積體,在重力等因素的作用下產生滑動或滑塌形成的微生物成因的滑塌混積巖;巖層物性好於其它巖層;藻灰巖層的成因決定了該地區單個沉積體規模小、分散、層薄。In order to imitate tune tail fin better, a flexible fin only in chordwise is considered. results shows that flexibility can increase the propulsive efficiency and cause small decreases in the average thrust compared with a rigid caudal fin with similar motion. next, a comparison between the rectangle fin and the lunate fin is given
為了使數學模型更貼近生物模型,本文又將尾鰭處理為只考慮弦向變形而不考慮展向變形的柔性體,兩者對比的結果表明,柔性翼使得平均推力減小,但是,對具有相同推力的柔性翼比剛性翼具有更高的效率。High sodium snacks include chili and salty chicken wing, sausage, bacon, luncheon meat, nuts added with salt and preserved plum etc
含高鹽份的小食有椒鹽雞翼腸仔煙肉午餐肉加鹽果仁腌制涼果如話梅等。A large share of tax revenues has been transferred to local authorities, though so far with disappointing results : much has either been misspent or gone unspent
稅收收入的一大部分轉給了地方政府,盡管到目前為止的結果令人失望:大部分不是被胡亂花掉就是不翼而飛。In order to verify the accuracy, credence and effectiveness of the unstructured overset grid algorithm, steady and unsteady flow field of naca0012 airfoil are simulated. the unsteady flow field is caused by the oscillation of the airfoil. the two computational results are both compatible well with the experimental data
為了驗證非結構重疊網格方法的正確性、可靠性和有效性,本文對基於非結構重疊網格的naca0012翼型的定常流場以及簡諧振蕩的非定常流場進行了數值模擬,均取得了與實驗數據符合良好的結果。Then the effect is to steepen the flanks of the pulse spectrum.
因此在效果上是加大了脈沖譜翼部的陡度。On the basis of axial vortex theory, the aerodynamic performance of tilt - rotor model has been built, and using it to analyze the aerodynamic performance of xv - 15, comparing to the actual data to prove the model ’ s validity, finally studied the variety of aerodynamic performance relative to the variable rotor diameter
以軸向渦流理論為基礎,建立了適合於傾轉旋翼機氣動分析模型,以xv - 15傾轉旋翼機作為算例,通過結果的對比,表明本文的氣動模型能較好的分析傾轉旋翼機的氣動性能,並在氣動性能的基礎上分析了直徑變化對傾轉旋翼機氣動性能的影響。Elastic theory and plastic theory are adopted in the analysis of the two section composite beam. elastic theory suggests, on the condition of the same steel beam section size, the composite beam for the floorslab is suited lower flanges convertion section stiffness cuts down by 75. 1 %, elastic limit bending resistant capability cuts down by 47. 9 %, than the composite beam for the floorslab is suited on the top flange. it s conversion section stiffness is lifted 8. 0 %, elastic limit bending resistant capability is lifted 0. 20 %, than the steel beam
彈性理論分析的結果表明,在鋼梁截面大小相同的條件下,樓板位於鋼梁下翼緣的組合梁和樓板位於鋼樑上翼緣的組合梁相比,其換算截面剛度降低75 . 1 ,梁的彈性極限抗彎承載力降低47 . 9 ,樓板位於鋼梁下翼緣的組合梁和純鋼梁相比,其換算截面剛度提高8 . 0 ,梁的彈性極限抗彎承載力提高0 . 2 。Plastic theory suggests, the composite beam for the floorslab is suited lower flange, it s plastic limit moment cuts down by 52. 4 % than the composite beam for the floorslab is suited on the top flange. it s plastic limit moment lifts 8. 8 % than the steel beam, which is on the same condition
塑性理論分析的結果表明,樓板位於鋼梁下翼緣形式的組合梁和樓板位於鋼樑上翼緣形式的組合梁截面相比較,其塑性極限彎矩降低52 . 4 ,和同等條件下純鋼梁截面相比較,樓板位於鋼梁下翼緣的組合梁塑性極限彎矩提高8 . 8 。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。Based on the aerodynamic characteristics of space shuttle booster - like missile bodies at angle of attack from 0 to 180, the flying characteristics of high maneuver at 90 angle of attack and velocity consuming at 180 angle of attack are analyzed
摘要以新一代無翼式氣動布局導彈為背景,在大攻角氣動特性理論基礎上,分析了在導彈主動段、攻角在180范圍內變化的導彈飛行特性,得出了90內大攻角最大轉彎能力和180攻角附近最大降速效果的結論。The results of test cases indicate that the flow parameters for the final design met the requirements and that the geometric parameters were fairly close to the desired values
算例設計結果表明,最終設計翼型的流動參數和形狀參數都很接近要求的值。Only clouds of points instead of grids are distributed over the computational domain and the spatial derivatives are estimated using a least - square curve fit on local clouds of points. the paper gives discrete form for euler equations on base of gridless method, and adopts five steps runge - kutta scheme for time - marching. the numerical results have been obtained for the 2 - d flows over airfoils or multi - element airfoils using the method presented
本文首先對無粘euler方程進行無網格離散,並運用顯式runge - kutta格式推進求解,成功地數值模擬了二維單段和多段翼型的繞流;在此成功的基礎上通過在euler方程的右端加入粘性項,使求解方程變為層流navier ? stokes方程,得到了翼型繞流,數值結果顯示出粘性的影響。After the data is analyzed, the software of fluent is used to calculate the flowfield. in order to make the calculation results agree with the experimental data, the model of the calculation has been modified based on the results of the experiment data
詳細分析比較旋翼機翼間的氣動干擾試驗數據后,應用fluent軟體進行分析計算,根據試驗結果修正計算模型,使計算結果與試驗結果趨於一致。Numerical simulation shows that, at small and medium c, multi - slot circulation control can increase the lift of the airfoil and reduce the amount of the energy expense, and that it can improve the aerodynamic performance of cca at higher mach numbers by avoiding the “ compressibility stall ”
結果表明,多噴口環量控制方法可以在中、小c吹氣時提高翼型的升力和減小能耗,並能改善環量控制翼型在較高來流馬赫數下的氣動性能,避免「壓縮性失速」 。In order to accelerate the convergence speed, we employ the local time step, and implicit residual smoothing methods. finally, we use this method to get the steady solution of the flow around naca0012 and naca4412 airfoil at very low speed and some basic unsteady solution
本文對在低馬赫數下繞naca0012翼型和naca4412翼型的定常流場進行了求解,結果和實驗基本吻合,並對非定常運動情況進行了初步模擬研究,得出了一些有意義的結果。The babies hereafter to the person of wing house please turn a blind eye, if they talked excessively and then scold
寶貝們以後對翼家的人請視而不見,如果他們說話過分了就罵。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