渦應力 的英文怎麼說
中文拼音 [guōyīnglì]
渦應力
英文
eddy stress-
From the numerical modeling results, it can be found that there is a clockwise gyre in the middle part of bohai sea, whether in wintertime or in summertime. in summer, the clockwise gyre corresponding to the high - temperature and low - density center in the middle bohai sea is mainly dominated by the density circulation. and in winter, it is mainly dominated by the wind stress curl
通過數值模擬結果發現，在渤海中部，無論冬季還是夏季，都存在一個順時針的渦旋運動，夏季，對應于渤海中部的高溫低密中心，其流場主體部分呈順時渤海冬夏季環流特徵及變異的初步研究針向旋轉，這主要是密度環流占優的結果，而冬季的順時針向的旋轉，主要是海面風應力旋度影響的結果。Air-feeding sleeves with considerably higher turbine torques are rejected and probably reworked.
渦輪力矩相當高的饋氣套簡應予退回，或許還得重新加工。Accounting for creep and stress relaxation, a long - term life and low cycle fatigue life prediction method for gas turbine engine hot section is established
摘要建立了考慮蠕變和應力鬆弛的航空發動機渦輪葉片等高溫構件的持久壽命和低循環疲勞壽命預測方法。The transient cfd simulation including the spiral case, stay vane, guide vane, runner vane and draft tube at different operation points is studied fitly, then the result of the pressure distribution on runner blade is provided for the runner transient structural simulation by fluid - structure interaction ( fsi ) method
文中首先對高水頭小負荷的渦帶工況下混流式水輪機內流場進行非定常cfd計算，得到渦帶工況下葉片表面不同時刻的水壓力載荷，並利用流固耦合方法對轉輪進行結構場瞬態特性計算，分析轉輪葉片的動應力特性。The calculation result is compared with that of some experiments and other references, and it is satisfactory. the subroutines can be applied to the stress analysis of turbine disks in aeroengines
計算結果表明介面子程序具有在不同應變率條件下、應變率跳級拉伸條件下以及循環載荷條件下的模擬能力，程序正確、可靠，適于渦輪盤等發動機熱端部件的應力分析。The equation of the pressure of scroll chambers 、 the force of axis 、 the force of radial 、 the force of tangent 、 inertial force 、 the composition of forces and the inertial movement is given. a dynamic model of scroll compressor of combination profile is developed, based on the analysis of the movement of the moving parts. this can provide base of theory for dynamical balance design 、 intensity design and reliability analysis
論文利用pro / e軟體建立新型組合曲線渦旋壓縮機動渦盤的三維實體模型，在此基礎上根據受力情況對動渦盤的渦圈進行了有限元分析，探討動渦盤在工作過程中由於氣體力的作用而產生的應力與應變規律，為進一步完善動渦盤的設計提供了理論依據。For the present two les models, adopting the subgrid eddy viscosity concept and introducing the transport equation of turbulence energy k, the subgrid scale turbulence is parameterized by the turbulence energy k and the length scale of turbulence / ( k - 1 model ). in addition, vegetation is considered as an internal source of resistant force and turbulence energy
在應用大渦模擬方法求解數值計算模型控制方程時，亞網格雷諾應力項沿用了亞網格渦粘性系數思路，引入亞網格紊流脈動動能k的輸運方程，建立了關于亞網格紊流脈動動能k和紊流特徵長度l的k - l模型求解。Based on prandtl ' s momentum transportation, this paper calculates in detail the physical quantities such as eddy viscosities, and ratio of eddy viscosity to motion viscosity, total stresses with respect to relative position in three regions of viscous sub - layer, buffer layer, and main turbulent stream for non - newtonian fluid flowing turbulently in ducts, which according to karman ' s three layer models and measurement of fluid parameters in evaluation apparatus, discusses the influence of polymer drag reduction on flowing properties of non - newton fluid, analyzes quantitatively principle of turbulent reduction phenomenon and condition of increasing reduction rate
摘要以普蘭德動量傳遞理論為基礎，按照卡門的三層模型，通過室內模擬環道用0號柴油及加入減阻劑在圓管內的流動參數的測定，計算了非牛頓型流體管內湍流邊界層的層流內層、過渡層、湍流中心的渦流粘度，渦流粘度與運動粘度比、總應力隨相對位置的變化等定量參數，探討了高分子減阻劑對非牛頓流體流動特性的影響，對湍流減阻現象的機理與增大減阻率的條件進行了定量分析。The mean profiles of reynolds stresses bear prodigious specialty, i. e. the lateral fluctuations at the centerline are inhibjied strongly and the longitudinal ones have the tendency of growing continuously, which is induced by the special symmetrical vorticity field
雷諾應力分佈有很大的特殊性，即軸線的橫向應力被強烈地抑制，而縱向應力卻有不斷變大的趨勢，這是由於特殊的對稱渦量場結構引起的。A vertical two dimensional model for thermo stratified flows is proposed, which solves the velocity and pressure by a fractional step method, and large eddy simulation model is used to calculate the reynolds stress and turbulent diffusion effect
摘要建立立面二維水動力學與水溫耦合模型，用分步法求解流速和壓力，採用大渦模型計算紊動應力和紊動擴散。If the two - equation turbulence models employ a linear relationship between the reynolds stress and the mean strain - rate tensors, this relationship is known as the generalized boussinesq model, the two - equation models can be extended for a wider range of applicability by developing more advanced nonlinear algebraic relations between the stress tensor and the mean - velocity gradient and the turbulent scales, this is known as explicit algebraic stress models ( easm )
另一個是構成模型，即決定應力張量、應變率張量和兩個湍流尺度因子之間的函數關系式，它決定了雷諾應力。如果構成模型是線性的，則為boussinesq渦粘模型（ evm ） ，如果構成模型是非線性的代數關系式，則為顯式代數應力模型（ easm ） 。An aeroengine power - turbine 1 ( superscript st ) stage rotor shrouded blade is taken for an example in the article, tightness of shroud and contact force 、 blade body stress under working state and assembly state are calculated by finite element contact analysis method, influence of working load ( temperature and centrifugal force ) is mainly analyzed
摘要以航空發動機動力渦輪一級帶鋸齒形葉冠的轉子葉片為例，用有限元接觸分析方法對裝配和工作狀態下的葉冠緊度和葉冠接觸力、葉身應力進行了計算和分析，著重考察了工作載荷（溫度和離心力）對葉冠接觸力的影響。Navier - strokes equation was solved using simple method. lam - bremhorst k - e was used to simulate turbulent flow. it was indicated in this thesis that a longitudinal vortex would be produced after the jet exhausted from a plate into a boundary layer at a pitch angle and a skew angle
研究結果表明，有一定傾斜角度的單個射流與主流作用后，將在下游產生一個流向渦旋，渦旋使得邊界層內的速度和雷諾應力發生嚴重扭曲，從而形成上洗區域和下洗區域。On the measurement of velocities and stress in vortex wave field with particle image velocimetry
測試渦旋波流場的速度和剪應力分佈The drag reduction of riblet biomimetic non - smooth surface is given out by numerical simulation with cfx. through analysis of velocity vector field and velocity fluctuation this article probe into drag reduction mechanism of unsmooth surface. through analysis of behavior of single microbubble and turbulent kinetic energy this article indicate drag reduction mechanism of microbuble
對仿生非光滑表面減阻機理，採用流體力學分析軟體cfx進行了數值模擬，通過對速度場、剪切應力、渦量的計算結果進行分析，得出了仿生非光滑表面減阻幾種主要原因。Then the two orientation states of fibres and three closure approximations are examined. analyses of fibre orientation and vorticity in the suspension can be contacted by stress features
另外比較纖維的平面與三維取向狀態、三種封閉格式對穩定性的影響，通過應力將纖維取向分析同流場渦量分析聯系起來。The conception of yield stress saturation is proposed. it can be found that the flow is stabilized by both plane shearing and the increment of yield stress. the study about the linear stability of spiral taylor - couette flow is the fourth part of the dissertation
通過對螺旋t - v流動的數值模擬發現，屈服應力增大將使流場中taylor渦減弱，且當屈服應力足夠大時，螺旋t - v流動重新恢復螺旋t - c流動；內桶軸向剪切運動在使taylor渦發生軸向遷移的同時也使其強度減弱。The main contents are as following : ( 1 ) finite element method ( fem ) is used to study the effects of broken inclusion and debonded interface on the stress intensity factors ( sif )
本文圍繞含夾雜粉末高溫合金渦輪盤的裂紋擴展壽命問題，開展了以下工作： （ 1 ）用有限元法研究了夾雜裂開以及夾雜與基體界面脫開對應力強度因子的影響。Powder metallurgy turbine disks are worldwide adopted in most advanced aeroengine nowadays. the research of engineering application of them is actively being carried out in our country, and the key problem urgently needed to solve is their low cycle fatigue life prediction. the low cycle fatigue failure of powder metallurgy turbine disks is mainly caused by inclusions, so it ' s important to study the effect of inclusion on the stress intensity factors ( sif ) initiation and development of crack in powder metallurgy turbine disks
當前世界上大多數先進航空發動機均採用了粉末冶金渦輪盤，我國目前正在積極開展粉末冶金渦輪盤的工程應用研究，其低周疲勞壽命預測成了亟待解決的關鍵問題，夾雜物是引起其低周疲勞失效的主要原因，因此開展夾雜物對粉末冶金渦輪盤應力強度因子及裂紋萌生與擴展的影響具有重要意義。A three - dimension baroclinic prognostic model on the o - coordinate is established based on pom to simulate the wintertime circulation and the eddies in the east china seas, considering the topography, inflow and outflow on the open boundary, yangtse runoff, heat flux and wind stress on the sea surface
本文在pom模式基礎上，建立一個坐標系下的三維斜壓預報模式，考慮了海底地形、外來流、長江徑流、海面風應力、海面熱通量等多方面因素的影響，模擬結果較好地體現了冬季東中國海環流及渦旋的特徵。分享友人