喷流

The flow field can be controlled and adjusted by rotary strength, flowrate ratio of jet to suction, entrance dip angle and width.

旋流强度、射抽流量比、喷口倾角或宽度等都能对该流场的形状和控制能力进行调节。

The conclusions can be drawn through numerical simulation: The hydrate-forming region becomes small with increasing circulation rate and inhibiter concentration, and it is possible to make the hydrate-forming region away from sea floor by increasing circulation rate and inhibiter concentration, thus preventing blowout preventer lines from hydrate plugging; the decrease in gas volume fraction in the annulus due to hydrate formation reduces pit gain, which can delay the detection of well kick; the possibility of hydrate presence at a relatively low gas production rate is much greater than that at a relatively higher production rate; the bottom hole pressure is affected little by hydrate phase transition, and it is allowable not to consider hydrate phase transition when the bottom hole pressure is calculated; shut-in casing pressure cann't truly reflect gas kick due to hydrate formation and the situation is getting worse with time

模拟计算结果表明：溢流期间，天然气水合物的生成区域会随着循环流量的增大或抑制剂浓度的提高而减小，可通过增大流量和抑制剂浓度使水合物的生成区域脱离海底，减小防喷器管线被堵塞的危险；水合物的生成使环空中气体体积分数降低，泥浆池增量减小，给溢流检测带来延迟；当检测到有气侵发生时，水合物藏分解速率比较小时，井筒中生成水合物的可能性要比分解速率大的情况下更为严重；水合物相变对井底压力的影响较小，在工程中计算井底压力时可以忽略；由于天然气水合物的生成使得关井套压值不能真实反应气侵情况，而且随着时间的增加情况会更加严重。

The principle of liquid scrubber technique and the separation of oil and water on the use of water circulation were analyzed.

分析了液体洗涤油烟净化技术的原理、水循环利用时对洗涤废液进行的油水分离，提出了采用Fluent软件分析喷淋的流场，以了解其流场的特性。

The solutions were found to be good agrees with experimental results. The transfer characteristic of air dry/wet bulb temperature and spraying water temperature were discussed. The LMTD method based on this mathematical model is applicable to design and verify for the plate wet air cooler. The ratio of the wet bulb heat transfer coefficient to the heat transfer coefficient under air-cooled conditions was investigated theoretically and experimentally. The relative errors of the ratio between theoretical and experimental valves are small than 7 percent.

分别得到了平行流型式微分方程组的解析解与交叉流型式的近似解析解，实验验证了该解析解具有较高的计算精度；探讨了空气干湿球温度与喷淋水温的迁移特性；分析得到基于湿球温度迁移模型的对数平均温差法在湿式空冷器的设计与校核计算中是适用的，给出了空气湿球换热系数与空冷时空气对流换热系数比值的理论与实验确定方法，比值系数理论值与实验值比较最大相对误差小于7％。

Based on analysis of the current state of the flow pattern modeling abroad and at home, explains the meaning of the mathematical simulation of the flows in the valve.(2) Comparing flow simulation data of jet pump with its experimental one, the feasibility and reliability of FLUENT used for flow simulation are proved.(3) Based on the characteristic of valves, the fluid field analysis of specific ring-spray type flow-adjustable is finished. The valve structure is optimized to meet the need, which makes it have such advantages:(1)smaller vortex area and faintish vortex intensity, so the vibration of vortex is controlled effectively;(2)the pressure is distributed more equality, the transition area is larger.

论文的主要内容包括：(1)简述了阀门研究的现状与发展，在分析与总结国内外流体流动模拟研究的基础上，探讨开展阀门内水流运动数值模拟的意义；(2)对特定型号的射流泵进行了内部流场的数值模拟研究，并与实验数据相比较，验证了应用Fluent进行数值模拟的可行性和可靠性；(3)针对调流阀的特点，对特大口径环喷式流量调节阀进行流场计算，其设计指导思想如下： 1、控制旋涡，减小旋涡区，减小涡的强度； 2、控制压力分布，使阀体受力更均匀，改善局部应力状态，提高阀门使用的安全性； 3、最小绝对压力高于水的汽化压力，不产生汽蚀。

To solve the practical problem where the temperature field distribution is low at the lower part of furnace chamber and high at the upper part and the temperature difference is untolerable , which is reflected by the thermocouples at site, the authors take the methods of multipoint test and computer hologram simulation to research into the fields in the furnace chamber of the zinc fractionating tower at Shaoguan Smelter CNNC.

针对锌精馏炉炉膛各检测点反映出的其上部温度偏高，下部温度偏低，上下温度偏差过大的实际问题，采用现场多点温度测试，结合炉膛内流场、浓度场、释热场和温度场数值仿真的方法对韶关冶炼厂二精馏系统进行研究；利用仿真结果中的流场扣浓度场数据，统计出实测中无法得到的各次空气和煤气在南1号至南4号各喷口的流量。

In this paper,a new kind humidifying fan with pre-fixed spraying nozzles has been developed on the basis of original axial fan.

在喷雾轴流风机的基础上，开发研制了一种前置式喷雾加湿风机。

According to the physical model, a simplified mathematical model is proposed for the paint flux distribution function, which describes the flux field within the spray cone.

本文在研究了喷涂机器人的喷炬特性后，根据物理模型采用了一种简化的数学模型来描述在喷炬流场中的涂料流量分布函数。

On the basis of the masteries for the aluminum oxide ore pulp drying and calcination, a mathematical model was developed for simulating the process of heat transfer and the calcination of two-phase flow in a new type furnace designed by Zhongzhou Branch Company, China Aluminium Corporation Limited. The fields of velocity, temperature and pressure of the two-phase flow and the reaction time were gained by optimizing calculation under the condition of different operational parameters and geometric parameters. The effect of vent position velocity and atomization particle diameter on the drying and calcination technology of aluminum oxide ore pulp was discussed.

在了解氧化铝矿浆干燥、烧成工艺及设备的基础上，针对中国铝业股份有限公司中州分公司开发的一种新的氧化铝矿浆干燥和烧成炉，建立了矿浆干燥、烧成炉内气固两相流的流动传热以及烧成过程的数学模型，就干燥、烧成炉运行参数及各几何参数进行优化计算，得出了炉内气固两相流动的速度场、温度场、压力场以及颗粒干燥和烧成反应时间，并分析讨论了喷口位置、喷口速度、颗粒雾化粒径等参数对氧化铝矿浆干燥、烧成工艺的影响。

Alloy powder welding technology progress Spray protection technology, with the successful development of low melting point powder spraying and welding in the developed based on a metal surface protection technology.

由于喷层经历重熔过程，计量泵涂层致密无孔，表面光滑平整，具有节约材料、质量好、效率高的优点，喷焊层表面硬度可高达HRC60-70，可以几倍甚至十几倍的延长水泵过流部件的使用寿命。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。