CFD of Thermal System for Euro VI Bus Engine

欧六客车发动机热系统CFD

• 批准号: 1941357
• 金额: --
• 依托单位: Queen's University Belfast
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1941357
• 关键词: CFD; Thermal; System; Euro; VI

The Wrights Group Ltd. produces the most fuel efficient single and double deck buses in the UK. Over the past four years, WrightBus have focused on improving conventional vehicle fuel economy. The high demand for more environmentally friendly vehicles has led to the introduction of more complex engine system technologies. In fact, the vehicle's power unit transitions from a single form of vehicle propulsion based on internal combustion engine (ICE) toward a hybrid system that includes more electrical components.A significant factor in continuing to improve fuel economy is to gain a deeper understanding of the vehicles thermal management. Vehicle thermal management systems are critical in terms of safety, reliability, performance and passenger comfort. To meet current and future emissions standards, the aftertreatment systems must be maintained above a certain temperature. Currently falling below this temperature requires fuel to be combusted within the aftertreatment system. This amounts to a significant fuel economy penalty.There is now a need for a complete and detailed CFD model of the engine thermal system of a mild hybridised conventional bus. Such a model can be used to evaluate thermal and therefore fuel economy performance in a simulated driving environment.The aim of this project is to develop a numerical model which is able to investigate the details of the heat transfer characteristics and thermal system in a Euro VI bus engine to achieve an optimum thermal management strategy. The model would essentially see the powertrain broken down into elements that would enable us to predict the hot spots in the engine components the engine bay. Valuable information achieved by the analysis of each of the main components will be used to investigate the relevance of the thermodynamic systems placed in the underhood. The model will be tested in various driving and environmental conditions. This project involves working closely with the Thermal Analysis team within the Wrights Group Technical Centre at QUB and with the development team at Wrights Group Ltd. to create and validate the model. The model will then be used to optimise the control strategy and to plan for future product development within the long term fuel economy technology road.

赖特集团有限公司生产最省油的单层和双层巴士在英国。在过去的四年里，赖特巴士公司一直致力于提高传统汽车的燃油经济性。对更环保车辆的高需求导致了更复杂的发动机系统技术的引入。事实上，该车的动力装置从基于内燃机（ICE）的单一车辆推进形式转变为包含更多电气元件的混合动力系统。继续提高燃油经济性的一个重要因素是深入了解车辆的热管理。车辆热管理系统在安全性、可靠性、性能和乘客舒适度方面至关重要。为了满足当前和未来的排放标准，后处理系统必须保持在一定的温度以上。目前，低于这个温度需要燃料在后处理系统中燃烧。这相当于一个显著的燃油经济性损失。目前需要一个完整的、详细的传统混合动力客车发动机热系统CFD模型。这样的模型可以用来评估热，因此燃油经济性性能在模拟驾驶环境。该项目的目的是开发一个数值模型，该模型能够研究欧VI客车发动机的传热特性和热系统的细节，以实现最佳的热管理策略。这个模型将把动力系统分解成不同的元素，使我们能够预测发动机部件和发动机舱的热点。通过分析每个主要部件获得的有价值的信息将用于研究放置在引擎盖下的热力学系统的相关性。该车型将在各种驾驶和环境条件下进行测试。该项目需要与位于QUB的赖特集团技术中心的热分析团队以及赖特集团有限公司的开发团队密切合作，以创建和验证模型。然后，该模型将用于优化控制策略，并在长期的燃油经济性技术道路上规划未来的产品开发。