curvilinear flow 中文意思是什麼
curvilinear flow
解釋
曲線流- curvilinear : 弧形的
- flow : vi 1 流，流動。2 （血液等）流通，循環。3 流過；川流不息；（時間）飛逝；（言語等）流暢。4 （衣服、...
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Numerical simulation of two - phase turbulent combusti on flow in an afterburner under generalized nonorthogonal curvilinear coordinate systems
非正交曲線坐標系數值模擬加力燃燒室湍流兩相流燃燒 -
Based on the review, the fluid flow and heat transfer in the curved circular and rectangular pipes have been researched by employing perturbation method and numerical simulation with a physical model under the rotational orthogonal curvilinear coordinate in a rotating curvilinear pipe with multi - parameters. we firstly analyzed the fully developed fluid flow and heat transfer, mixed convection heat transfer, the development of flow and heat transfer in the inlet in different cross section ( circular, elliptical, annular and rectangular crossection ). the variations of the secondary flow, axial velocity, distribution of temperature, the friction force on the wall, the ratio of friction factor as well as the nusselt number with different dimensionless parameters had been examined in detailed
本文在總結和分析了一個世紀以來有關曲線管道流動和換熱特性的研究成果的基礎上，以旋轉正交曲線坐標系統下的多參數旋轉螺旋管道中的對流傳熱為物理模型，通過攝動方法和有限體積法，首次對各種截面（圓截面、橢圓截面、環形截面、矩形截面）旋轉曲線管道內充分發展流動的流動結構和傳熱特性（包括耦合對流傳熱特性）以及旋轉曲線管道開口段發展流動的流動結構和換熱特性進行了系統的數值模擬和理論分析，詳細討論了各種無量綱參數對管道內軸向速度分佈、二次流結構、溫度分佈、壁面摩擦力、摩擦系數比以及管道nusselt數的影響，獲得了若干創新性成果。 -
In arbitrary curvilinear coordinates, the wall function is used for treating near wall regions. the influences of two different inlet gas parameter distributions and turbulent combustion models, as well as three different afterburners on turbulent combustion flow fields and wall temperature profiles are calculated. comparisons of experiment results and calculations results show that second - moment combustion model is reasonable for modeling turbulent reacting flows, inlet gas parameter distributions is more important. calculation method is reliable and can be used for the optimum design of afterburner
數值研究三種不同幾何形狀、兩種進口氣流參數分佈、兩種紊流燃燒模型等對加力室內各氣流參數、隔熱屏和加力室筒體壁面溫度分佈的影響，計算結果與試驗數據比較表明:不同幾何形狀加力室對加力室內紊流燃燒流場的影響要比進口氣流參數分佈大些，正確給定進口氣流參數分佈較為重要，二階矩紊流燃燒模型更適用摸擬三維紊流燃燒流動，計算方法合理，編制的計算程序可靠，可供加力燃燒室優化設計用。 -
In arbitrary curvilinear coordinate systems, three dimensional turbulent combustion flow fields of the three kinds of turbofan engine afterburner with the longitudinal heat shield 、 outer cold flow and the jet nozzle are simulated. the three - dimensional body - fitted grids are generated by an elliptical grid generation procedure and zone method
本文在任意曲線坐標系統下對三種帶有縱向隔熱屏、外冷卻通道和尾噴管的渦扇發動機加力燃燒室的三維紊流燃燒流場進行數值模擬。 -
The flow equations are solved using finite difference technique. using body - fitted curvilinear coordinate system treated the boundary conditions. by iteratively solving the flow governing equation and the blade equation, the design of axial flow pump impeller in the quasi - three - dimensional rotational flow can be performed according to the angular momentum distribution, the blade which was designed in the lifting method, flow channel and the blade thickness given
其次在流動無粘性、不可壓及考慮葉片厚度的條件下，依據葉輪內的流動特性，推導了葉輪內三維流動周向平均流動控制方程以及葉片方程；在貼體坐標系中，採用有限差分法求解流動方程和葉片方程；在採用升力法設計出的葉片作為初始葉片、給定葉片速度矩分佈、葉片厚度分佈和葉輪軸面流道幾何形狀條件下，迭代求解流動控制方程及葉片方程，實現了軸流泵葉輪的準三維方法設計。 -
The results fairly agree with the classical one. further, simulation of flow around groups of cylinders is presented. all of the results show that the method for curvilinear boundary is effective and the performance of parallel computation is efficient
100圓柱繞流進行了計算，計算結果和經典結果一致。進一步，對柱群間復雜流場做了模擬，結果表明，此方法在處理復雜邊界是有效的，並且具有較好的并行效率。 -
Some new and interesting conclusions are obtained as follows : there exists evident difference on the flow behaviors and heat transfer between rotating curvilinear pipe and the stationary curvilinear
結果表明：旋轉曲線管道內充分發展的流動結構和與靜止曲線管道存在著明顯差別。 -
Lbm is a recent developed method with advantage of high parallel performance and easy boundary treatment. for curvilinear boundary, a new method has been adopted for simulation of flow around cylinder with
Lattice boltzmann method lbm是一種近年來發展的一種數值方法。它具有并行效率高，邊界處理簡單的特點。本文採用一種能對曲線邊界進行較好處理的方法，用lbm對 -
6. a 3 - d flow and sediment model in curvilinear collocated grid is developed from 2 - d model
（ 6 ）非交錯曲線網格三維水流泥沙數值模型，採用擬合曲線坐標和垂向坐標變換。 -
Based on poission equation conversion, generated methods of curvilinear grids are presented. 4. 2 - d flow and sediment transport model with non - staggered curvilinear grids is presented
（ 3 ）以poission方程變換為基礎，建立擬合曲線坐標系下非正交和正交曲線網格生成方法。 -
Finally, in orthogonal curvilinear coordinate systems numerical model is established and applied in the yangtze river estuary in which some regulation plans are taken include submerged jets and groins. verifications are also done to verify water level and velocity. flow fields are computed for the analysis of effect of regulation engineering on the whole water area
最後，應用正交曲線網格技術，建立了正交曲線坐標系下廣義淺水方程的計算模式，將之應用於長江口深水航道整治工程的流場計算，進行實測水位、流速驗證和流場模擬。 -
At the entrance of the rotating curvilinear pipe, both the development of flow structure and temperature distribution depend on f and the characteristic quantities of flow and heat transfer change obviously
在曲線管道的開口端，流場結構的發展過程與f密切相關，開口端各流動特徵量變化十分顯著。管道的摩擦系數比沿軸向變化與入口類型以及旋轉條件密切相關。 -
After the coordinate transformation, the discrete velocity boltzmann equation is solved directly in computational domain to preserve the geometry of body. the results comparison of cylindrical couette flow at different size meshes, different lattice bgk models and different algorithms shows that, not only the precision of the incompressible lattice bgk model is satisfactory, but also the curvilinear coordinate algorithm is efficient
首先計算了存在理論解的圓柱couette流動，並針對不同數目的離散網格、不同格子模型以及不同坐標系演算法，對結果進行了比較，不僅再次印證了本文第四章給出的不可壓格子模型具有滿意的計算精度，而且表明本章的貼體坐標演算法是行之有效的。 -
Second, a parallel adaptive ray - casting algorithm for graphic rendering of cfi is developed. in the computational model of cfi, the line - of - sight integration is difficult to obtain for 3d complicated flow field, because curvilinear grids, multizone curvilinear grids, and other irregular grids that are commonly used in computational fluid dynamics ( cfd ) present interesting challenges, such as the complex shapes of cell regions defined by grid points ; the wide variation in the sizes of cells in different regions of the grid ; and the intersecting or overlapping nature of multi - grids. the parallel adaptive ray - casting algorithm is extremely efficient to solve these problems
并行自適應光線投射法繼承了光線投射法適合於任何形式網格的優點；光線與計算網格的交點自適應地反映了原來網格點物理量的分佈，能夠與數值計算的精度保持一致；圖像平面的自適應演算法使我們不必從每一個像素發出射線，既提高了光線投射法的計算效率，同時又保證重采樣后激波這樣的高頻信息不會損失；將并行處理技術引入計算光學流動圖像生成過程，解決了大規模數值模擬結果的處理對計算速度和內存容量的需求。
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