The need to maintain adequate visibility through the front windows of a bus is a critical aspect of safe driving. Improving the performance of the windshield defroster is the prerequisite for achieving this goal. The detailed numerical simulations are performed on bus windshield defroster by means of computational fluid dynamics technology, the distributions of flow field and temperature are acquired in the internal bus and the windshield glass. The experiments are carried out using full - scale current bus models. The computational study is validated by the experiments. The results show that the maximum deviation between the two is less than 4 degrees Celsius and has a similar distribution. The computational fluid dynamics technology is proven to be an effective means, which can be used in the defrosting design of bus windshield.%保持前车窗良好的视野是客车安全驾驶所必须的,提高挡风玻璃的除霜性能是实现这一目标的前提.通过计算流体力学仿真手段对客车的除霜系统进行了细致的数值仿真,得到车内以及挡风玻璃附近气流的速度、温度等参数的分布.试验是在一真实尺寸客车上进行的.计算同试验结果对比表明,挡风玻璃表面的最大温度偏差不超过4℃,分布规律相似.计算流体力学仿真技术被证明是1种有效的手段,可以用于客车挡风玻璃的除霜设计中.
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