摘要
实际生产中油气悬架内部油液可能存在温度梯度,而目前油气悬架温升研究中多将其内部的油液整体作为一个研究对象,这会导致对油气悬架系统温度变化的预测不准确.针对该问题,将油气悬架内部油液划分为多个区域,在油液多区域的油气悬架的热力学模型中引入油液流动传质.通过仿真计算确定油液流动状态获取油液传质的量,分析油气悬架中各个区域油液温度的变化趋势,并将模型计算与试验结果进行对比.结果表明,油气悬架内部油液存在温度梯度,将油液作为整体对象进行研究会存在一定误差,将油液划分为多个区域后进行研究能较为精确地描述油气悬架内部油液温度变化规律.
Internal oil in a hydropneumatic suspension is treated as a research object in recent thermodynamic studies; in fact,there should be a temperature gradient in the oil,and this may result in inaccurate predictions of the temperature change of the suspension. This paper outlines a method of dividing the internal oil into multiple regions to solve the problem. Firstly,a validation experiment was performed to test the temperature gradient in the oil. Then,a lumped parameter thermal model was established to describe the suspension used in the test. The most important is that mass transfer between the regions was taken into consideration in the model. Experimental results show that the temperature gradient exists in the internal oil. In other words,it is inaccurate to make the whole internal oil as a research object. Meanwhile,comparative results show that the proposed model can describe the temperature change regularity of the oil more accurately.
出处
《工程科学学报》
EI
CAS
CSCD
北大核心
2015年第7期950-954,共5页
Chinese Journal of Engineering
关键词
油气悬架
油液
温度梯度
集中参数模型
hydropneumatic suspensions
oil
temperature gradient
lumped parameter models
