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通过为更深刻理解气道几何形状与性能特点之间关系的试验研究,运用数理统计的试验设计技术开发了一种参数化的进气道设计工具。特别注重获得实际的、生产上可行的进气道几何形状,这种气道在发动机设计构思中可以直接使用。使用灵活、可替换的通用进气道模型建立起一种模块式方法。用约束条件表示气缸盖的附加特性和外部布置上的要求。运用快速成型模型和可靠的试验方法对其性能进行尽可能完全的评价。通过比较预测值和新的试验数据,成功地验证了缸内的气体流动。通过分析试验设计数据和产生的多项式模型,开发了一系列柴油机普遍适用的进气道知识模型并用于预测优化设计配置。介绍了在开发和测试参数化的知识模型时所提出的主要任务,包括对关键结果和结论的讨论。同时还给出了一个示例以说明该系统在开发工作及实际方案设计关键性评价中的运用。
Through a pilot study of the relationship between airway geometry and performance characteristics, a parametric inlet design tool was developed using the experimental design of mathematical statistics. Special attention is given to obtaining realistic, commercially viable inlet geometry that can be used directly in the engine design concept. Build a modular approach using a flexible, replaceable, universal inlet model. Constraints are used to indicate the additional characteristics of the cylinder head and the requirements of the external layout. Use rapid prototyping and reliable test methods to evaluate their performance as completely as possible. By comparing the predicted value with the new experimental data, the gas flow in the cylinder was successfully verified. By analyzing the experimental design data and the polynomial model generated, a series of knowledge models of intake manifold commonly used in diesel engine were developed and used to predict the optimum design configuration. The main tasks presented in developing and testing a parametric knowledge model are presented, including a discussion of key findings and conclusions. At the same time, an example is given to illustrate the system’s application in the key evaluation of development work and actual project design.