A predicting method of wing turbulent separation area and the influence of different turbulent models on the results of prediction are introduced.
介绍了机翼气流分离区的预测方法和不同湍流模型对其预测结果的影响。
The experimental results show that the single-phase frictional pressure drop in narrow annuli is higher than that in normal circular tubes when the convection is in laminar area, and they two are similar in turbulent area. In heat-exchange conditions, the flow frictional curves put up levity characteristics, which bear not only on the peculiar structure of narrow annuli but the changes of viscidity and density of working fluid.
实验结果表明：水在窄环隙内流动摩擦阻力在层流区比普通圆管的流动摩擦阻力大；在紊流区二者差别不大，而且在换热条件下，窄环隙内的流动阻力曲线表现出多变特性，这种阻力特性不仅与窄环隙特殊的结构有关，而且也与进出口温差造成的粘度和密度的变化有关。
The velocity of most gas in turbulent area ar...
在颗粒粒子数目为1000的情况下，在z=0xy平面内CO气体的峰值浓度为17%，CO峰值达到了27.4%。
Fully developed incompressible turbulent flow in a conical diffuser having a total divergence of 8° and an area ratio of 4 has been simulated by a DLR k-ε turbulence model and its BFC method.
用DLR型k-ε紊流模型BFC法，对总扩散角为8°，扩散度为4的锥形渐扩管内充分发展的不可压粘性紊流进行数值仿真。
Fully developed incompressible turbulent flow in a conical diffuser having a total divergence of 8° and an area ratio of 4 has been simulated by a DLR k-ε turbulence model and its BFC approach.
用DLR型k-ε紊流模型。BFC法，对总扩散角为8°、扩散度为4的锥形渐扩管路内完全发展的不可压粘性紊流场进行了数值仿真。所研究的紊流在入口的雷诺数为1.16×105~5×105。
The research results indicated the down flow vertically downward, no spit line created and no triangular area. Turbulent current turned from floor upward to downward, and operating space air flow is more stabilize.
研究结果表明：生物安全柜四面格栅出流更改为台面孔板出流，且高效过滤器占操作区横截面比例由一般80%达到94.2%后，相比较：操作区下降气流流线竖直向下，没有产生气流分割线，消除了三角形气流空白区域，台面下方产生的湍流由台面上方转到台面下方，操作区气流更加稳定。
Calculated results showed that in simulated combustion conditions, turbulent intensity in the whole furnace was very high, and mixture of pulverized coal and gas flow were quite uniform, flame permeating degree in furnace were high, so it is advantageous to ignition, combustion and burn-off of pulverized coal. Flame formed high temperature area adjacent to burner at the center of furnace, and formation concentration of both fuel-NO_x and thermal-NO_x in that area were highest. With decreasing secondary air flow rate and increasing burn-off air flow rate, highest temperature in the area adjacent to burner in furnace decreased, and high temperature area would move towards upside of furnace, formation concentration of NOx decreased.
结果表明：在模拟的燃烧工况条件下，整个炉膛内部湍流强度都比较强烈，煤粉气流的混合非常好，火焰充满度高，有利于煤粉的着火燃烧与燃尽；火焰在燃烧器区域附近炉膛中心形成最高温度区域，在该区域内生成的燃料型NO_X和热力型NO_X浓度都最高；减少二次风量，提高燃尽风量可使炉膛内燃烧器区域的最高温度降低，使高温区域向炉膛上部移动，NO_X的生成浓度降低。
A large range of IRZ and intense fluctuating velocity area around the boundary of IRZ is measured and thought to be important to keep the excellent ignition and combustion characters of the new kind swirl burner. Together with temperature trace method, different structure and operation parameter of the burner are studied in this paper about their effects on turbulent and mixing characters of swirling jet. The structure variation includes different blade angle, use of central gear shape baffle, variable outer length and angle of lean primary air outlet, use of wedge outlet of lean primary air.
采用上述两种测量方法并结合热质比拟温度示踪的方法，本文对径向浓淡旋流煤粉燃烧器喷口结构和气流流动参数的变化对旋流流场的流动、混合、湍流脉动特性的影响进行了深入研究，研究了旋流叶片倾角大小、中心齿型扩锥、淡一次风扩口外伸长度和扩角的变化、淡一次风楔形扩口、直流二次风扩口角度的变化对出口旋转射流流动特性的影响，研究了一次风率和旋流二次风率运行参数变化的影响规律。
The conventional method of heat transfer enhancement for turbulent flow in tube is to increase the heat transfer area, but it will increase the pressure drop across the tube significantly.
管内湍流强化传热方法一般是增加壁面换热面积，但这会显著提高管内流动阻力。
In this paper, the turbulent model and boundary conditions were chosen to simulate the clean operating room on the empty state condition based on CFD numerical methods. The impact on the different area of air inlet, the position and number of air outlet to the operating zone velocity were researched.
本文以千级洁净手术室作为研究对象，采用CFD数值模拟方法，选用合适的湍流模型和边界条件，模拟了手术室在空态下，送风口面积、回风口位置及数量对手术区速度场的影响。
There is larger turbulent kinetic energy in the internal swirl area near the air column under the end of the overflow tube in the hydrocyclone;
旋流器内湍动能较大的区域是溢流管端以下空气柱附近的内旋流区域；
Also we can determine partial annular turbulent and laminar flow area range using laminar flow area equation of eccentric annular Newtonian fluid.
可用偏心环空牛顿流体层流区域方程确定环空局部层流和紊流区域范围。
The results show that the narrow annulus can enhance heat transfer in the turbulent flow area.
实验结果表明，在紊流区窄环隙可以强化换热；
Based on the scattering equation of sound wave in turbulent medium, a formula for the mean quasi-backscattering section on a finite receiving area under static condition and condition with horizontal velocity has been derived.
本文从湍流大气对声波散射方程出发，推导出静止大气和有水平运动两种情况下，有限接收面积上的平均准后向散射截面公式。
In order to estimate eccentric MR, two parameters named turbulent intensity and regurgitate angle were proposed to modify the effective regurgitate orifice area (EROA) based on traditional PISA algorithm.
针对这一现状，从返流角度和湍流强度两个方面，对传统PISA算法的有效返流瓣口面积（EROA）进行修正。
Circumfluence area and a maximum turbulent kinetic energy area are located in the vicinity of meniscus.
在弯月面附近出现明显的钢液回流区；
Enhance heat circumfluence and turbulent perturbation to found a steady igniting area;
加强炉内的热回流和湍流扰动，构建稳定的着火区域；
In this paper the trends in the study on the coherent structure of turbulent shear flows are discussed with a brief review of the achievements in this area during the last thirty years.
本文在简要地回顾了30多年来湍流拟序结构研究的进展之后，评述了目前拟序结构研究的动态。
There are two relatively high areas of turbulent kinetic energy and dissipation for the downstream region. One area is near the spout and the other is in the vortex center. The position of maximum turbulent kinetic energy lags behind the vortex center in recirculation region.
对湍动能及其耗散率分布的分析可以得到，在喷口下游有两个相对较高的区域，一个在喷口附近，一个在回流区内，回流区内湍动能最大值存在滞后的现象。
The investigation of laminar-turbulent transition is the most challenging task in the area of modern fluid dynamics, and it is crucial importance in the design of modern high-performance aerodynamic vehicles.
关于层流&湍流的转捩的研究是现代流体力学中最具有挑战性的一个课题，对现代高性能飞行器的设计具有重要的意义。