内流场环境的方程式赛车进气歧管优化设计

发动机进气系统作为制约整车动力系统主要性能的子系统，成为进行车辆动力性能提升中设计优化的关键之一。基于此，研究开展了赛车环境下进气歧管相关尺寸参数对进气效果的分析。基于已有发动机实体，研究首先构建了完整的发动机数字分析模型获得理论分析的基准尺寸参数，而后耦合发动机其他性能指标参数，通过发动机台架试验验证仿真结果的准确性。最后，通过单因素变量控制法定量分析进气歧管长度与内径等几何参数变量对进气歧管在发动机设计性能影响的具体关系。结果表明基于数字模型分析的结果具有较高的力学逼真度，研究可以为后续赛车以及乘用车设计中发动机行性能提升提供参考。

An Optimal Design of Intake Manifold for Formula Racing Car in Internal Flow Environment

The engine air intake system is considered as a subsystem that restricts the main performance of the vehicle power system, and has been regarded as one of the keys to design optimization in the improvement of vehicle power performance. Based on this, the research has carried out the analysis of the intake effect of the relevant dimensional parameters of the intake manifold in the racing environment. On the premise of the existing engine entities, the research first constructs a complete engine digital analysis model, obtains the reference size parameters of theoretical analysis, and then couples other engine performance index parameters, so that the accuracy of the simulation results can be verified by the engine bench tests. Finally, under the application of single factor variable control method, the specific relationship between geometric parameters such as intake manifold length and inner diameter on engine design performance has been analyzed quantitatively. The results have shown that the results based on digital model analysis have high mechanical fidelity, which can be used as a reference for improving engine performance in subsequent racing and passenger car design.