【正文】 reetier format symbols secession law [4] and so on. In the pressible N S equations, the calculation method has been great progress, he proposed switching function method, mediation factor method, pact upwind scheme to promote iterative method, nonvolatile no free parameters and dissipative format, munity values are limited to format and pare methods of dissipation [3]. These studies to further improve the accuracy of the calculation method to improve the efficiency of the solution, and the flow field numerical simulation of shock wave have a higher resolving power. And the results of these studies allows us to difference method in CFD research work initially formed its own characteristics. Beginning of the 20th century, 80 years later, puter hardware technology has been rapid development of 10 million submachines, 100 million submachine gradually ing into practical activities. With the calculation method of continuous improvement and development of the theory numerical analysis of highprecision numerical simulation is no longer a fantasy. Meanwhile, along with production practices of human activities in the continuous development of science and technology with each passing day, a large number of hightech industry of putational fluid dynamics made new demands, but also for the development of putational fluid dynamics has provided new opportunities. The constant interaction of theory and practice to form a new hot spot for putational fluid dynamics, new impetus, thus promoting the continuous development of putational fluid dynamics. First of all, in the calculation of models, but also introduced some new models, such as the new largeeddy simulation model, given the effect of wall curvature of the new turbulence model, the new multiphase flow model, the new aircraft aerodynamic analysis and thermal structure of the integration model, etc. [5]. This makes the calculation of putational fluid dynamics model consists of the initial Euler and N S equations, extended to include turbulence, twophase flow, chemical nonequilibrium model of the solar wind and other studies, including a number of models [6]. In which to consider the more mobile mechanisms, such as anisotropy of the nonlinear (stress / strain relationship) turbulence research focus. The results once again proved that universal turbulence model does not yet exist, it is important is how the model accuracy and putation to obtain the better promise。 also have a higherlevel research scholars from the turbulence model issue, not microturbulent flow velocity, suspect that N S equations of the effectiveness of further proposed to integral equationbased mathematical model [6]. Secondly, in the calculation methods, but also made a number of new calculation methods, such as a new genetic algorithm, nongrid algorithm, the new highprecision pact format, the new aerodynamic calculation of variational principles, structure / unstructured hybrid grid New technology, new moving grid, etc. [5]. The study focused on the present method of calculation methods in highprecision formats, namely, the pursuit of thirdorder accuracy of the above Among them solve real practical problems. In addition, the calculation method also involves higherorder interpolation with a limiter, spectral methods, Lagrangian methods, time space conservation element methods, etc.. Will be other methods to introduce the traditional putational fluid dynamics is an important result of this stage [6], which is particularly worth mentioning is that the genetic algorithm bined with the traditional putational fluid dynamics, in the field division and optimal design and many other aspects of shows a good application prospects. In the algorithm analysis, in addition to the traditional accuracy, stability, convergence and other aspects of the analysis, as well as a deeper level of numerical dynamic analysis will soon be seen as a numerical method to analyze dynamical systems to reveal the value of many exotic phenomena. Again, the research results, the United Kingdom M1A1Lesdhziaer on the turbulence model, the United States H1C1Yee on the calculation of uncertainty, the Japanese scholars Boltzmann equation with mobility problems, Germany39。s E. von Lavante parallel puter on the use of the engine cylinder and the vortex flow field Shock of the unsteady flow simulation, etc. [6], there is a relatively new academic ideas, high academic standards. At present, putational fluid dynamics study of hot spots are: research methodology, including the parallel algorithm and a variety of new algorithms。 study of vortex motion and turbulence, including pressure and inpressible turbulent direct numerical simulation, large eddy simulation and turbulence mechanism。 Research Network grid generation techniques and puter optimized design。 study of putational fluid dynamics to solve practical flow problems, including the calculation of biomechanics, calculation of acoustics, micromachinery flow, multiphase flow and turbomachinery flow numerical simulation [7]. 2 Application of Computational Fluid Dynamics The application of putational fluid dynamics has changed from the initial field of aviation and aerospace continuously extended to the ship [8], ocean [9], chemical [10], casting [11], cooling [12], industrial design, urban planning and design [13] , building fire protection design [14], automotive [15] and other fields. In recent years, putational fluid dynamics in the whole flow field calculation, rotor calculation, aircraft engines, flow calculation, the missile launch, aircraft external stores, underwater fluid mechanics, car, etc. [6] gained wider application. This shows that the putational fluid dynamics in solving practical engineering problems have an important application value. The following applications in the automotive sector only as an example, putational fluid dynamics applied to engineering practice in the speed and depth. The 20th century until the