...有点错误可以,但不要太多,更不要用在线翻译或者有道什么的,都是有...

发布网友发布时间：2024-03-22 23:51

共4个回答

热心网友时间：2024-03-24 06:57

摘要内容：随着汽车行驶速度的提高，汽车阻力也明显加大。
Abstract: when the vehicle speed increases, its resistance obviously increases as well.
研究表明：车速达到70km/h时，汽车阻力占行驶阻力的一半。
Research shows that when vehicle speed reaches 70km/h, its resistance takes up half of the driving resistance.
汽车速度过高对汽车的稳定性、安全性也有着很大影响。
The excessive vehicle speed has great influence on the stability and safety of the vehicle.
现阶段空气动力学研究一般都采用风洞试验、数值模拟、理论研究。
The current aerodynamics research generally adopts wind tunnel test, numerical simulation and theoretical research.
风洞试验室运用最为广泛，但其投资过高、周期长等缺点。
The wind tunnel test is the most commonly used, but it has disadvantages such as too much investment, long cycle and etc.
随着计算机的发展，数值模拟取得了很大的发展（CFD）。
With the development of computer, the numerical simulation has had huge development (CFD).
CFD是以电子计算机为工具，应用各种离散化的数学方法，对流体力学的各类问题进行数值试验、计算机模拟和分析研究，以解决各种问题。
CFD uses different mathematical method of discretization by means of computer to test, stimulate, analyze and research various problems of hydromechanics and etc. so as to deal with these problems.
CFD具有试验周期短、费用低等优点。
CFD has these advantages such as short test cycle, low cost and so on.
目前的模拟是CFD和风洞试验相结合的方法，互相促进，CFD还不能完全取代风洞试验。
CFD and wind tunnel test are adopted in current simulation and they mutually promote, but CFD cannot totally replace wind tunnel test.
本文首先对汽车流场发展和研究意义和CFD软件包做了介绍。
This paper first introduces the development of flow field and CFD software package.
第二章中对CFD的理论基础进行了讲解。
It illustrates the theoretical principle of CFD in the 2nd chapter.
第三章主要说明利用GAMBIT建立汽车模型、网格划分以及边界条件的确定。
In the 3rd chapter it mainly explains the utilization of GAMBIT to make car model, the grid generation and the determination of edge condition.
在第四章中说明FLUENT进行模拟的一般步骤。
The 4th chapter gives out the general procedures of FLUENT simulation.
第五章中对不同的汽车前部后部造型进行模拟对比，了解汽车前后造型设计的基本思路。
In the 5th chapter simulated comparisons are made about the shape of the front and rear part of different vehicles in order to understand the basic idea of their design.
汽车前部发动机盖应与水平面成一定斜度，汽车顶部与发动机盖在同一曲面上，汽车尾部为鱼尾巴形的汽车造型最优。
The front vehicle hood should form a certain slope with the horizontal plane. The vehicle roof and hood should be on the same curved surface. Those vehicles with fishtail-shaped rear part have the optimum shaping.
还对汽车的不同离地距离和不同行驶速度进行了分析对比。
Analysis and comparison is also made in different ground clearances and running speeds of vehicle.
汽车离地距离小，汽车升力增加，气动阻力减少。
When the vehicle ground clearance decreases, the lift will increases, thus reducing the aerodynamic resistance.
汽车速度增加是周围空气速度和阻力将明显加大。
The increase of vehicle speed obviously increases the ambient air speed and resistance.
合理的确定造型和最优的离地距离对汽车阻力减少影响很大。
The reasonable shape and optimum ground clearance has huge influence on the decrease of vehicle resistance.
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Copyright@2010 Lawrence. All rights reserved.

热心网友时间：2024-03-24 06:58

推荐这个答案很好了应该是用有道词典翻译的吧呵呵~~

热心网友时间：2024-03-24 06:57

As the vehicle speed increase, car resistance also significantly increased. Research shows that: the speed reached 70km/h, the car resistance of driving resistance by half. Auto speed too high for the automobile stability, safety also has very big effect.

Present aerodynamic studies typically use the wind tunnel test, numerical simulation and theory research. Wind tunnel using laboratory most widely, but its investment higher, and long life cycle shortcomings. With the development of the computer, numerical simulation has achieved great development (CFD). CFD on electronic computer as the tool, the application of various discretization mathematical methods, convection physical learn various problems numerical experiment and computer simulation and analysis of research to solve various problems. CFD has test cycle is short, the cost advantages. The current simulation is the CFD and wind tunnel test method combining each other, promote each other, CFD also cannot completely replace the wind tunnel test.

In this paper, first car flow field development and research meaning and CFD software packages are introduced. The second chapter to CFD theoretical basis to explain. The third chapter basically illustrate using GAMBIT establish model car, meshing and boundary conditions are determined. In the fourth chapter illustrate FLUENT simulation of the shipunloaders. Chapter 5 of different auto front rear modelling is simulated, understand auto contrast before and after modelling design basic ideas. The front engine cover should with the horizontal plane into a downward, car top and engine cover in the same curved surface, the rear of the car for fish tail shape of automobile modeling optimal. Also on the car is different from the ground distance and different speeds was analyzed and compared. Automobile distance from the earth, auto lift small increases, the aerodynamic drag reduction. Auto speed increase is the ambient air speed and resistance will significantly increase. Reasonable to determine the optimal model and the distance from the earth to automobile resistance reduce influence.

热心网友时间：2024-03-24 06:58

With the improvement of vehicle speed, vehicle drag is also significantly increased. The results show that: the speed to 70km / h, the car running resistance accounted for half of the resistance. Vehicle speed is too high stability of the car, also has a great impact on security.
Aerodynamics research at this stage is generally used wind tunnel tests, numerical simulation, theoretical research.
The most widely used wind tunnel test chamber, but the investment is too high, long cycle and other shortcomings. With the development of computers, numerical simulation has made great progress (CFD). CFD is the computer as a tool for application of discrete mathematical methods, the various problems of fluid mechanics numerical test, computer simulation and analysis to solve various problems. CFD has a short test period, the cost is low. The current CFD simulation and wind tunnel testing is the method of combining and promote each other, CFD also can not completely replace wind tunnel testing.
Firstly, the development of the car and significance of the flow field and the CFD software package is introduced. The second chapter the theoretical basis of CFD were explained. The third chapter demonstrates the use of GAMBIT build car models, mesh and boundary conditions. The fourth chapter in the FLUENT simulation shows the general steps. Chapter V on the back of the front cars of different simulation model compared to understand the design front and rear basic ideas. Automotive front hood should be a certain slope and the horizontal plane, car top and the engine cover the same surface, the fish tail-shaped rear of the car is the best car styling. Also the different cars and different distances from the ground speed were analyzed and compared. The distance from a small car, car lift increases, aerodynamic drag reduction.
The increase in vehicle speed around the air velocity and resistance will be significantly increased. Reasonable to determine the optimal shape and the distance from the ground a great influence on the car to reduce drag.
哥们我一句一句翻译的。绝对行