基于非线性模型的舰船电站柴油机瞬态特性仿真及试验研究

Study of Test and Simulation of Transient Performance of Marine Power Station Diesel Engine Based on Nonlinear Model

建立了舰船高背压涡轮增压柴油机的非线性动态仿真模型,并在VC++环境下开发了仿真软件,对负荷突加突卸、排气背压波动、停机过程等典型瞬态工况进行仿真研究。仿真结果与试验结果的比较表明该仿真模型具有较高的精度,可以用于研究柴油机在瞬态工况下的运行特性,可以较好的反映柴油机宏观的性能参数的动态特性,也可以从微观上描述柴油机的动态热力过程。

The paper built up a nonlinear dynamic simulation model of turbocharged marine diesel engine with high back pressure, and a software was developed in the environment of VC＋ ＋, which could simulates steady condition and typical transient process of loaded suddenly, unloaded suddenly, exhaust back pressure fluctuating, engine stopping and so on. Comparing the simulating result to the test result, it is found that the nonlinear dynamic simulation modelhas high precision. Thus the simulation model can be used to study the transient characteristic of the marine power station diesel engine, which can show not only the transient characteristic of performance parameters but also the microcosmic thermal process.