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为了更为准确地对内燃机耦合部件三维燃烧过程进行模拟,开发了一种内燃机燃烧室耦合部件三维传热有限元法(FEM)计算程序.建立了内燃机气-固传热模型;通过将该模型应用于KIVA程序,可获取用于有限元计算的燃烧室壁面的三维瞬态燃气温度分布及对流换热系数分布.以汽油机LJ377MV为例,计算了内燃机耦合部件的稳态温度场及瞬态温度场,结果表明:壁面附近瞬态温度边界条件的不均匀性对内燃机耦合部件稳态温度分布及瞬态温度波动有着重要影响.
In order to simulate the three-dimensional combustion process of the internal combustion engine coupling components more accurately, a three-dimensional heat transfer finite element method (FEM) calculation program for the combustion chamber coupling part of the internal combustion engine was developed. The gas-solid heat transfer model of the internal combustion engine was established. Applied to the KIVA program to obtain the three-dimensional transient gas temperature distribution and convection heat transfer coefficient distribution of combustion chamber wall used in finite element calculation. Taking the gasoline engine LJ377MV as an example, the steady-state temperature field and transient temperature The results show that the inhomogeneity of the transient temperature boundary conditions near the wall has an important influence on the steady-state temperature distribution and the transient temperature fluctuation of the coupling components of the internal combustion engine.