The research established the mathematical model and built unitive control equations to outer flow , solid structure and inner flow of the turbine blades 本论文建立了热?流?固耦合的数学模型，对流体和固体建立了统一的控制方程组，并对方程组的离散。
In any fluid handling system , valves are the controlling element : starting or stopping flow , regulating or throttling flow , preventing backflow , or relieving and regulating pressure 在任何流体处理系统中，阀门是作为控制装置：启动或停止流体流动，对流体进行调节或节流，防止倒流，或释放和调节压力。
The development of science and technology appeals to the improvement of fluid machinery ' s performance . traditional design method is not enough to satisfy the need . it is necessary to adopt modern design theories and methods 随着科学技术的进步和经济的发展，许多领域对流体机械的性能要求越来越高，传统设计方法已不能很好满足新的需要，应采用现代设计理论和方法，这要求设计者首先掌握流体机械内部流动状况。
By reason that the structure of filler was fallacious , and flowing state was not accordant with mass transfer mechanism of multiphase hydrodynamics , the popular biological reaction was not in the condition for mass transfer , and the efficiency of mass transfer of multiphase liquid movement declined 其主要原因在于填料的结构形式不合理，对流体的流态控制不符合多相流体力学的物系传质机理，使得多相物系之间的传质扩散效率低下。
Numerical results show that the bubble concentration distribution can be predicted by using the two - way coupling of the fluid and the bubble motion , and adding the wall lift force into the bubble motion equation , and the fluid velocity , turbulence intensity and shear stresses modified by the bubble motions can also be revealed 数值模拟结果表明，通过加入壁面升力和采用双向耦合方法，可以较准确地预测气泡浓度分布和揭示气泡流动对流体湍流结构的影响。
The vibration of the pipeline is one of the frequent phenomenon of the pipeline system , the dynamic characteristic of the pipeline has a strong influence on the stability and reliability of the whole system , and it also can influence or even destroy the ordinary work of other facility and element of the pipeline system 管道振动是管道系统的常见现象,管道的动特性能对整个系统的稳定性,可靠性有着很大的影响,对流体管道系统和系统中的其它设备和元件的正常工作产生影响,甚至造成破坏。
The influence of various waterpower and configuration parameters on heat transfer is analysed and the rules of convective heat transfer coefficient and the ratio of heat transfer enhancement with mass flux are obtained . at the same time , we gain important results as below : as for resonance chamber with certain configuration , self - oscillation can be generated under suitable configuration and waterpower parameters . for the same configuration resonance chamber , the intensity of the self - oscillation is changed by the waterpower parameters 当流量及压差降低至一定程度时，共振腔还可能削弱换热；加热功率的提高会增加流体（水）的温度，流体的粘度会随着降低，这会减少对流体脉动的阻碍，使脉动衰减得更慢，而脉动幅度的增加会增强换热，故加热功率对有脉动的对流换热是有影响的；自振腔产生的流体脉动频率是自振腔固有频率或其整数倍,流体脉动频率过高或过低都不利于对流换热，存在一有利于强化换热的频率范围。
Through statistics and analysis of fluid a nomaly characteristics , this paper obtained the time distribution characteristics of fluid a nomaly of the moderately strong earthquakes , especially those with intensity v , earth quakes in beijing and its adjacent area , and summarized the leading time of each phases anomaly before the earthquakes , which can be regarded as index of occurrence time of earthquakes 通过对流体异常特征的统计分析，给出了北京及邻近地区的中期、中短期、短期和短临异常的时间分布特征，并对地震前各阶段异常的超前时间进行了总结，该时间可作为发震时间的预测指标。
Adopting method of graphical modeling and with help of object - oriented design thought , a set of graphical modeling softwares has been developed by using c # . net programming tool , the influence of fluid network ' s height difference upon the pressure - flow rate passage being considered , at the same time , the enthalpy - temperature passage being also added , thereby perfecting and expanding further the fluid network 摘要采用图形化建模方法，借助面向对象的设计思想，使用c # . net编程工具开发了流体网络图形建模软件，该软件对压力流量通道考虑了流体网络高度差的影响，并增加了洽温通道，从而对流体网络做了进一步完善和扩展。
The immersion electrical heater is chiefly applied in the direct contact mode of fluid heating . it features fast heat exchange and high thermal efficiency . it has the varieties of water heater , oil heater and gas heater . its heating element power density , i . e . the power per unit of heating area of the heating element , is an important parameter of the electrical heating element , which has a direct bearing on the performance and working life . the working out of the value is a highly specialized problem , being under the influence of many factors ( media flow rate , tempt , physical and chemical properties and direction in which the medium flows past the element etc ) 浸入式电加热器主要用于直接对流体接触加热的场合，具有热交换快，热效率高等特点，分为水用加热器、油用加热器、气体用加热器，加热元件的功率密度：即电加热元件单位发热面积上的功率，它是电加热元件极重要的参数，直接影响加热器的使用性能及使用寿命，它的取值是一个非常专业的问题，受到许多因素的影响（如介质的流速、温度、物理和化学性质及介质流过加热元件的方向等等） 。
