摘要
介绍了所研制的小功率车用液体燃油加热器的特点。为提高热效率,避免高温燃气在换热过程中易直接由排气口侧流道短路逃逸的现象,对杯筒形热交换体底面上的放射状径向散热片采取径向片顶非等直径结构,以径向片顶直径大小不同分组,使各组散热片以靠近排气口侧的数量密度最大,其密度由下而上逐渐减小,至排气口对面一侧为最小;同时,将杯筒形热交换体底面放射状径向散热片的轴向片顶所组成的平面,设计成排气口侧高,对面一侧低的楔形。而将燃烧器设计成有利于气体流动,不易产生积炭的锥盖形燃烧室,并配以切向进气孔强化油气混合,使其充分燃烧。对燃烧器内的气体流动进行了模拟计算和分析。经验证,该加热器的设计是成功的。
The characteristic of the developed low power liquid fuel heater for automobile was introduced. In order to improve the heat efficiency and avoid the phenomenon of hot burned mixture escaping from the vent side during the heat transfer progress, an unequal diameter configuration was designed for the actinomorphic radiator fins on the bottom surface of the cupulate heat exchanging body. The radiator fins were grouped by diameter. Each group had the most number of radiator fins at the side near the vent. The number of radiator fins gradually decreased from down to up and reached the least at the opposite side of the vent. Meanwhile, the top surface composed of axial fins in the radial radiator fins on the inner surface of the cupulate heat exchanging body was designed to be cuniform shape whose side of the went is high and opposite side is low. The combustor was designed to be a cone cover chamber, which would be helpful for air flow and wouldn＇t produce soot. Beside this, the tangential inlet holes were added to combustor to make the mixing of fuel and air for complete combustion. Finally, the simulation and analysis for gas flow in the cone cover burner was carried out.
出处
《车用发动机》
北大核心
2007年第5期81-84,共4页
Vehicle Engine
关键词
燃油加热器
燃烧器
数值模拟
结构设计
fuel heater
burner
numerical simulation
structural design
作者简介
毛华永（1951-），男，山东省青岛市人，研究员，硕士生导师，主要研究方向为内燃机工作过程及车用燃油加热器；E—mail：mhuayong@sdu. edu. cn.
