Fuel Spray Formation & Wall Impingement in Engines

本计画将探讨直喷式火花点火引擎中燃油喷雾发展之基本原理。研究的主要领域将包括全口径燃油喷雾的形成和光学发动机中的壁撞击成像以及与气体和颗粒废气排放的相关性。喷雾形成和撞击试验也将在恒定体积的燃料喷射室中在受控的热力学条件下进行。还将研究冲击位置处的壁面传热。这些研究方法的结合，将给出一个完整的图片缸内效应有关的发动机不同的工作制度和喷射策略。还将探讨减少燃料壁撞击影响的表面处理。

This project will investigate the fundamentals of fuel spray development in Direct-Injection Spark-Ignition (DISI) engines. Key areas of study will include full-bore fuel spray formation and wall impingement imaging in an optical engine and correlation with gaseous and particulate exhaust emissions. Spray formation and impingement tests will also be conducted in a constant volume fuel injection chamber at controlled thermodynamic conditions. Wall heat transfer at locations of impingement will also be studied. The combination of these research methods will give a full picture of in-cylinder effects related to various engine operating regimes and injection strategies. Surface treatments to reduce the effects of fuel wall impingement will also be explored.