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METHOD FOR DECIDING CHEMICAL REACTION RATE CONSTANT USED FOR ENGINE COMBUSTION SIMULATION AND ENGINE COMBUSTION SIMULATION METHOD

机译:确定用于发动机燃烧模拟的化学反应速率常数的方法和发动机燃烧模拟方法

摘要

PROBLEM TO BE SOLVED: To provide a method for deciding a chemical reaction rate constant used for a combustion simulation, capable of accurately reproducing combustion reaction in an engine with a reduced calculation load.SOLUTION: A method for deciding a chemical reaction rate constant used for a combustion simulation, comprises the processes to: identify a fuel component species included in object fuel; select chemical reaction formulas to be used for a combustion simulation among chemical reaction formulas describing ignition phenomenon of the fuel component species; specify the chemical reaction formula which has relatively high sensitivity to generation amounts of HCHO and HOduring a low temperature oxidation reaction and another chemical reaction formula which has relatively high sensitivity to a reaction temperature during thermal ignition time; and optimize a chemical reaction rate constant of each of the specified chemical reaction formulas so that low temperature oxidation reaction time and the thermal ignition time calculated through a combustion simulation respectively coincide with predetermined target low temperature oxidation reaction time and target thermal ignition time.SELECTED DRAWING: Figure 2
机译:解决的问题:提供一种确定用于燃烧模拟的化学反应速率常数的方法,该方法能够以减少的计算负荷准确地再现发动机中的燃烧反应。解决方案:一种确定用于燃烧模拟的化学反应速率常数的方法燃烧模拟,包括以下过程:确定目标燃料中包括的燃料成分种类;在描述燃料成分的着火现象的化学反应式中,选择用于燃烧模拟的化学反应式;规定在低温氧化反应中对HCHO和HO的生成量具有较高敏感性的化学反应式和在热着火期间对反应温度具有较高敏感性的另一种化学反应式;并优化每个指定化学反应式的化学反应速率常数,以使通过燃烧模拟计算出的低温氧化反应时间和热着火时间分别与预定的目标低温氧化反应时间和目标热着火时间一致。 :图2

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