CFD modeling of surge tank degassing process

调压罐脱气过程的 CFD 建模

• 批准号: 453186-2013
• 负责人: Lien, FueSang
• 金额: $ 1.82万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=541346
• 关键词: CFD; modeling; surge; tank; degassing

Increasing engine power output and efficiency, whilst still satisfying environmental requirements, have been major objectives for vehicle manufacturers worldwide. An engine cooling system has a great influence on those objectives. The cooling system can not only prevent the internal engine parts from melting due to the heat of the burning fuel, but keep the engine operating temperature at its most efficient level as well. As an integral part of the cooling system, a surge tank serves as a degassing chamber, allowing for continual and effective removal of any vapor (air and/or vaporized coolant). Otherwise, the vapor, if trapped and circulated in the system, may seriously degrade heat transfer effectiveness in the engine water jacket and radiator and erode the water pump due to the implosion of gaseous bubbles. A surge tank provides a huge benefit to the overall cooling system. However, for those surge tanks with relatively high fluid flow rates, it becomes more difficult to de-aerate the coolant due to the fracture of air/vapor into small bubbles. ABC Group Inc. - a Canadian-based tire 1 supplier in automobile industry - designs and produces pressured surge tank/coolant recovery, as one of its important plastic products, for automotive OEMs worldwide. It has been identified by the ABC Group that there is a strong need to improve surge tank designs by having in-depth understanding of the degassing phenomena, involving mixture of liquid coolant, vapor coolant and air.

提高发动机功率输出和效率，同时满足环保要求，一直是全球汽车制造商的主要目标。发动机冷却系统对这些目标有很大的影响。冷却系统不仅可以防止发动机内部部件因燃烧燃料的热量而熔化，而且还可以使发动机的工作温度保持在最有效的水平。作为冷却系统的一个组成部分，调压箱作为一个脱气室，允许持续和有效地去除任何蒸汽（空气和/或汽化冷却剂）。否则，蒸汽如果被困在系统内循环，可能会严重降低发动机水套和散热器的换热效率，并因气泡内爆而腐蚀水泵。调压箱为整个冷却系统提供了巨大的好处。然而，对于那些流体流速相对较高的调压罐，由于空气/蒸汽破裂成小气泡，冷却剂的脱气变得更加困难。ABC集团是加拿大一家汽车轮胎供应商，为全球汽车整车厂设计和生产压力调压罐/冷却液回收塑料产品。ABC集团已经确定，通过深入了解涉及液体冷却剂、蒸汽冷却剂和空气混合物的脱气现象，强烈需要改进调压罐的设计。