Voltage rise anemometry in turbulent flows applied to internal combustion engines
Voltage rise anemometry in turbulent flows applied to internal combustion engines
复制标题
应用于内燃机的湍流中的电压上升风速测量
DOI：
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发表时间：
2021
影响因子：
2.4
通讯作者：
G. Rottenkolber
中科院分区：
文献类型：
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作者：
M. Wörner;G. Rottenkolber
在实验过程中，发展了一种测量湍流的技术--电压上升风速法。最初，为了基本理解和校准的目的，对特定的风洞进行了基础调查。由此，推导出不同热力学条件下由点火系统二次电压测量计算流量的数学关联式。随后，将该方法应用于一台火花点火发动机的缸内流动测量。因此，不需要对燃烧室进行任何改变，以避免被测流场的任何干扰。比较了四种不同的发动机构型，进行了平均流动和湍流的研究。此外，计算结果还表明，测量的湍流与分析的燃烧参数之间存在明显的相关性。
In an experimental procedure, a voltage rise anemometry is developed as a measurement technique for turbulent flows. Initially, fundamental investigations on a specific wind tunnel were performed for basic understanding and calibration purpose. Thus, a mathematical correlation is derived for calculating flow from measured secondary voltage of an ignition system under different thermodynamic conditions. Subsequently, the derived method was applied on a spark-ignited engine to measure in-cylinder flow. Therefore, no changes on combustion chamber were necessary avoiding any interferences of the examined flow field. Comparing four different engine configurations, a study of mean flow and turbulence was performed. Moreover, the results show a clear correlation between measured turbulence and analysed combustion parameters.