查询词典 vortex flow

It shows that flow field of vertical vortex is not only the function of the radial coordinate but also the function of the axial coordinate.

运用数值模拟具有能模拟各种不同边界条件的优势，还对非对称来流条件下形成的立轴旋涡进行了模拟。

The number and size of flow jets can be varied to optimize the creation of a mixing vortex, and the direction angle can be varied in the same manner, and/or optimized for Coriolis efficiency (counter clockwise in the Northern Hemisphere, and clockwise in the Southern Hemisphere).

的数量和规模的流动战斗机可以多种多样，优化建立一个混合涡和方向不同的角度可以以同样的方式，和/或优化的科里奥利效率（反顺时针在北半球，并顺时针方向的南半球）。

Around the dark core of an optical vortex, the energy flow carried by the light beam is like a spiral staircase, flowing in a clockwise or counterclockwise direction.

绕着光涡旋的黑暗中心，光束携带的能量流就像螺旋梯，沿着顺时针或者逆时针方向流动。

The Discrete Vortex Method for compressible flow is then proposed, in which the dilation term is solved by the Particle Method within the Lagrangian framework.

基于Lagrangian框架下的粒子方法，求解可压缩流中的胀量项，从而用离散涡模型求解了非定常、不稳定、可压缩流场。

Validation of the method is presented by calculating the Taylor's vortex array and a double layer flow problem.

并以Taylor涡和流体的初始流场为双层速度分布的问题为例，得到了很好的结果。

LES cooperated with the second order full extension ETG finite element method is applied to simulate three typical problems concerned with convection heat transfer with sufficient experimental data. By comparing the numerical results with the experimental results, LES is proved to be of better accuracy and stability when it is used to solve the problems concerned with convection heat transfer. The time history of the flow field and temperature field can be reflected better, and abundant information of the fields can be obtained. Furthermore the details of the change in the vortex structure can be captured.

应用大涡模拟与二阶全展开ETG有限元离散格式相结合的方法对具有实验基础的三个典型对流换热问题进行了数值模拟，并将模拟结果与相应的实验结果进行对比，证明了大涡模拟应用于对流换热问题中具有较高的稳定性和精度，能够较好地反映流场和温度场的时变过程，提供丰富的温度场和流场信息，捕捉流场中旋涡结构的变化细节，尤其适合于边界形状复杂的区段内含有大尺度各向异性涡的流动和换热问题的计算。

In the first part, first, the operational principle of Varivec Propeller is explained. Secondly, the mathematical model for predicting longitudinal and transverse movement hydrodynamic characteristics of Varivec Propeller under steady or unsteady condition are present, based on the general propeller lifting-surface theory, potential flow theory and Green theorem. Thirdly, theoretical calculation methods for predicting hydrodynamic characteristics when the influence of paraboloidal boss on the performance of Varivec Propeller is or isn't considered are present, based on The finite basic solution method, the unsteady vortex lattice method and Hess-Smith method Different rake angle is adopted according to different desire in practical application.

在理论计算部分，本文首先给出了全方向推进器的工作原理，然后基于常规螺旋桨升力面理论、势流理论和格林定理建立了定常和非定常状态下全方向推进器纵向、横向运动的水动力性能计算的数学模型，并利用有限基本解法、非定常涡格法和Hess-smith方法分别对考虑和不考虑桨毂影响时的全方向推进器纵向、横向运动水动力性能进行了数值预报。

The test finished in plan cascade wind tunnel in GTE got the frequency spectra of vortex shedding in all kinds of work condition, and realized unsteady cooperative flow type by method of sound excitation.

在中国燃气涡轮研究院完成了全部叶栅吹风实验，获得了某种扩压叶栅叶片表面旋涡脱落频谱随来流工况变化的规律，并通过声激励的手段在国际上首次捕捉到了新一代"非定常耦合流型"。

In this thesis, we mainly investigate mean curvature flow with external force fieldswhich comes from the study of the vortex of a Ginzburg-Landau system.

本文主要研究一类带外力场的平均曲率流，它源于对一类Ginzburg- Lan-dau方程的漩涡运动的研究。

The purpose of the present paper is to investigate the characteristic feature of the aerodynamics of a nose cone at a high angle of attack and study the vortex stability problem for the flow over a flat-plate delta wing with the dorsal fin .

本论文主要是通过实验来研究细长圆锥体在大迎角下的绕流流场的特性和细长三角翼加背鳍后对前缘涡的影响，检验相关理论结果。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。