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首页> 外文会议>American Society of Mechanical Engineers(ASME) Internal Combustion Engine Division Fall Technical Conference; 20050911-14; Ottawa(CA) >NUMERICAL SIMULATION OF DI DIESEL ENGINE'S COMBUSTION CHAMBER USING SEVERAL TURBULENCE MODELS DURING INTAKE AND COMPRESSION STROKES
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NUMERICAL SIMULATION OF DI DIESEL ENGINE'S COMBUSTION CHAMBER USING SEVERAL TURBULENCE MODELS DURING INTAKE AND COMPRESSION STROKES

机译：进气和压缩冲程中几种湍流模型对DI柴油机燃烧室的数值模拟

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Atomization of the fuel that is injected to the combustion chamber depends on flow field characteristics during the compression process. Mixture formation, mixture preparation rate and delay period are some of the dominant factors in DI diesel engine performance and emission level. This paper presents a new CFD approach simulation of flow field during intake and compression of a four strokes IC engine. In this model a dynamic mesh is used to simulate the moving boundaries of engine parts, such as piston and valves. Computational domain, which is a precise model of one cylinder, is meshed to 300,000-500,000 cells. In our solution three different two-equation turbulence models are used. The capability of each model is highlighted and the results are compared with relevant works. The focus of these turbulence models and three-dimensional simulation of engine flow are to validate the reliability of flow characteristics. The results accurately demonstrate the three-dimensional characteristics of air motion in the swirl chamber and development of vortices.
机译：喷射到燃烧室的燃料的雾化取决于压缩过程中的流场特性。混合气的形成，混合气的制备速率和延迟时间是DI柴油机性能和排放水平的一些主要因素。本文提出了一种四冲程IC发动机进气和压缩过程中流场的新型CFD方法仿真。在此模型中，动态网格用于模拟发动机零件（例如活塞和气门）的运动边界。计算域是一个圆柱体的精确模型，可划分为300,000-500,000个单元。在我们的解决方案中，使用了三个不同的二方程湍流模型。每个模型的功能都将突出显示，并将结果与​​相关工作进行比较。这些湍流模型和发动机流动的三维模拟的重点是验证流动特性的可靠性。结果准确地证明了旋流室内空气运动的三维特征和涡旋的发展。

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