柴油机非稳态燃烧的循环模拟

A Cycle Simulation of Unsteady Combustion of Diesel Engines

在非稳态燃烧过程中 ,发动机的转速、燃油喷射率和负荷在每一循环中均不相同 ,而且循环结束时的条件也不等于循环开始时的条件 ,所以不能用稳态模型研究柴油机的非稳态燃烧过程 文中以燃烧模拟函数为基础建立了柴油机非稳态燃烧的循环模拟模型 ,并开发了相应的计算程序 该程序可用来计算气缸压力、温度、空燃比等参数 试验和计算结果的对比表明 。

During the unsteady combustion procedure, the rotating rate, fuel injecting rate and load are different in each cycle, the condition at the beginning is also different from that at the end during a cycle, so we can't use a steady model to simulate the unsteady combustion. Based on the heat release model, this paper gives a general mathematical model of unsteady combustion of diesel engines, and develops a corresponding program. This program can be used to calculate cylinder pressure, temperature, equivalence ratio, and so on. The calculation results of this cycle simulation program are identical with the test values.