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首页> 外文期刊>Energy Conversion & Management >1D modeling of SI engine using n-butanol as fuel: Adjust of fuel properties and comparison between measurements and simulation
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1D modeling of SI engine using n-butanol as fuel: Adjust of fuel properties and comparison between measurements and simulation

机译：使用正丁醇作为燃料的SI发动机的一维建模：调整燃料特性以及测量与仿真之间的比较

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摘要

n-Butanol is an option of biofuel with potential to be used in the transportation industry. There is little information about performance of engines running with this alcohol and thus is very difficult to evaluate its advantages. A way to bypass this limitation is to use numerical simulation, mainly 1D models, to represent the whole engine and preview its performance running with different fuels. The lack of information about n-butanol and its combustion properties are big challenges to surpass when building these virtual models. A way to overcome these challenges is numerically model an engine and adjust the fuel properties until the numerical results are in agreement with test results. The aim of this work is to estimate fuel properties of an n-butanol-gasoline blend by means of numerical simulation, allowing the comparison of its performance against other fuels. Starting with a virtual engine model, the fuel properties were adjusted based on test measurements until a good agreement between numerical results and measured results was obtained. After numerical calibration, some of the main n-butanol fuel parameters (BU40) needed by 1D codes were obtained, like liquid fuel heat of vaporization @ 298 K = 583 kJ/kg, density = 813 kg/m(3), liquid fuel abs. entropy @ 298 K = 3015.78 J/kg-K, critical temperature = 563 K, critical pressure = 4.5 MPa, gaseous fuel abs. entropy @ 298 K = 4723.79 J/kg-K, among others. The properties thus obtained leaded to well approximated results, where numerical to experimental results for indicated mean effective pressure (IMEP) are lower than 0.1 bar, lower than 8% for peak cylinder pressure (PCP) and lower than 7% for rate of heat release (ROHR).
机译：正丁醇是生物燃料的一种选择，有可能在运输行业中使用。关于使用这种酒精​​运行的发动机性能的信息很少，因此很难评估其优势。绕过此限制的一种方法是使用数值模拟（主要是一维模型）来表示整个引擎并预览使用不同燃料时的性能。建立这些虚拟模型时，有关正丁醇及其燃烧特性的信息的缺乏是克服这些挑战的巨大挑战。克服这些挑战的一种方法是对发动机进行数值建模并调整燃料特性，直到数值结果与测试结果一致为止。这项工作的目的是通过数值模拟来估计正丁醇-汽油混合物的燃料性能，从而使其性能与其他燃料进行比较。从虚拟发动机模型开始，根据测试结果调整燃油性能，直到数值结果与测量结果之间取得良好的一致性。经过数值校准后，获得了一维代码所需的一些主要正丁醇燃料参数（BU40），例如298 K = 583 kJ / kg的液体燃料汽化热，密度= 813 kg / m（3），液体燃料腹肌熵@ 298 K = 3015.78 J / kg-K，临界温度= 563 K，临界压力= 4.5 MPa，气体燃料绝对值。熵@ 298 K = 4723.79 J / kg-K，等等。如此获得的特性可得出近似的结果，其中指示平均有效压力（IMEP）的数值至实验结果低于0.1 bar，峰值气缸压力（PCP）低于8％，放热率低于7％ （ROHR）。

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