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首页> 外文学位 >A rapid engine prototyping methodology: Coupling engine geometry and flow field to engine performance prediction.
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A rapid engine prototyping methodology: Coupling engine geometry and flow field to engine performance prediction.

机译：快速的发动机原型制作方法：将发动机的几何形状和流场与发动机性能预测相结合。

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摘要

In this dissertation, we propose a rapid engine prototyping methodology which can be an extremely valuable tool from preliminary engine design and optimization to control system development. Specifically, the proposed methodology links three preexisting tools: a water analog engine simulator with a 3-D particle tracking velocimetry technique, a thermodynamic, crank-angle resolved engine model, and a complete, low-frequency dynamic powertrain mean value model. The methodology comprises several steps, which can be used separately or in conjunction, as follows:; The first step involves using a water analog engine simulation rig coupled with an automated 3-D particle tracking velocimetry (3-D PTV) system. This allows to use an actual engine head or a rapid-prototype “soft” flow box to quickly determine the complex large-scale 3-D in-cylinder flow field during the intake stroke.; The second step involves extracting some relevant metrics from the 3-D PTV flow field results (mean flow and bulk turbulence characteristics) and linking these to subsequent heat release/burn rate characteristics.; The third step involves using the above combustion parameterization in a thermodynamic, crank-angle resolved single cylinder engine model to perform detailed engine simulations and obtain crank-angle resolved in-cylinder pressure and hence overall performance characteristics for various engine operating conditions.; The last step involves using these detailed simulation results to derive a calibrated mean value model which is then used in an engine/powertrain simulator for control system design and optimization. This step along with the previous steps in our procedure allows to perform a virtual engine mapping which leads to a calibrated mean value model and finally to control system development.; The joint use of all these tools represents a powerful and fast methodology for preliminary engine design and optimization, as well as calibration of existing engines. In the first case, it provides an opportunity to considerably reduce the design/optimization cycle time and cost, by decreasing the number of actual engine prototypes to be built. In the second case, it provides an opportunity for control system development early in the development cycle (potentially prior to an actual functioning engine prototype) and for the development of advanced model-based engine control strategies.
机译：本文提出了一种快速发动机原型设计方法学，该方法对于从发动机的初步设计和优化到控制系统的开发都是非常有价值的工具。具体而言，所提出的方法将三个预先存在的工具联系在一起：具有3-D粒子跟踪测速技术的水模拟发动机模拟器，热力学，曲轴角解析发动机模型以及完整的低频动态动力系平均值模型。该方法包括几个步骤，可以单独使用或结合使用，如下所示：第一步涉及使用水模拟发动机模拟装置和自动3-D粒子跟踪测速（3-D PTV）系统。这样就可以使用实际的发动机盖或快速成型的“软”流箱来快速确定进气冲程期间复杂的大型3-D缸内流场。第二步涉及从3-D PTV流场结果中提取一些相关指标（平均流量和整体湍流特性），并将其与随后的放热/燃烧速率特性联系起来。第三步涉及在热力学曲轴角分辨的单缸发动机模型中使用上述燃烧参数化，以执行详细的发动机仿真，并获得曲轴角分辨的缸内压力，从而获得各种发动机工况的总体性能特征。最后一步涉及使用这些详细的模拟结果得出校准的平均值模型，然后将其用于发动机/动力总成模拟器中以进行控制系统设计和优化。此步骤以及我们过程中的先前步骤允许执行虚拟引擎映射，从而生成校准平均值模型，并最终控制系统开发。所有这些工具的共同使用为发动机的初步设计和优化以及对现有发动机的校准提供了一种强大而快速的方法。在第一种情况下，通过减少要制造的实际发动机原型的数量，它提供了显着减少设计/优化周期时间和成本的机会。在第二种情况下，它为控制系统在开发周期的早期（可能是实际运行的发动机原型之前）的开发以及基于模型的高级发动机控制策略的开发提供了机会。

著录项

  • 作者

    Ko, Jang-Hyok.;

  • 作者单位

    The Ohio State University.;

  • 授予单位 The Ohio State University.;
  • 学科 Engineering Mechanical.; Physics Fluid and Plasma.; Applied Mechanics.
  • 学位 Ph.D.
  • 年度 2001
  • 页码 196 p.
  • 总页数 196
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;等离子体物理学;应用力学;
  • 关键词

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