小球藻生物柴油详细燃烧反应动力学模型的构建

采用气相色谱质谱联用仪测定了小球藻生物柴油的组分和比例,分析了小球藻生物柴油的理化特性,在此基础上,确定了小球藻生物柴油的表征物质。应用“叠加法”构建了小球藻生物柴油的详细燃烧反应动力学模型,利用激波管试验和发动机台架试验数据对模型加以验证。研究结果表明,选取物质的量比为1∶1的癸酸甲酯和正庚烷作为小球藻生物柴油的表征物质,所构建的详细燃烧反应动力学模型包含3300种物质,10851个基元反应。温度高于1000 K时,着火延迟期的预测值与实验值的最大误差小于8.1%,温度低于1000 K时,误差介于8.1%~15.3%。所构建的模型能较好地预测内燃机缸内压力,最大相对误差为6.6%。

Construction of detailed combustion reaction kinetic model of chlorella biodiesel

The composition and proportion of chlorella biodiesel were measured by gas chromatography-mass spectrometry.The physical and chemical properties of chlorella biodiesel were analyzed,and the characterization of chlorella biodiesel was determined.The detailed combustion reaction mechanism of chlorella biodiesel was constructed by shock tube test and engine test data.The results showed that methyl decanoate and n-heptane with a molar ratio of 1∶1 can be used as the characterization of chlorella biodiesel.The detailed mechanism consisted of 3300 substances and 10,851 elementary reactions.When the temperature is higher than 1000 K,the maximum error between the predicted value and the experimental value of the ignition delay period is less than 8.1%.When the temperature is lower than 1000 K,the error is between 8.1%and 15.3%.The model can predict the internal pressure of the internal combustion engine.The maximum relative error is 6.6%.