柴油机燃烧放热规律的数值模拟  

Numerical simulation of diesel engine combustion exothermic regularity

作　　者：李鸿瑞[1] 张均东[1] 封志强[1] 吴培莉 

机构地区：[1]大连海事大学轮机工程学院,辽宁大连116026 [2]大连船舶重工集团设计研究所有限公司,辽宁大连116021

出　　处：《大连海事大学学报》2013年第3期37-41,共5页Journal of Dalian Maritime University

基　　金：国家自然科学基金资助项目(51179102)

摘　　要：提出一种将模拟退火算法和阻尼最小二乘算法相结合的改进算法,并将其用于零维燃烧模型的建立.以预测值和实测值的偏差及曲线的拟合优度为衡量标准,对改进算法和传统算法进行比较.结果证明,改进算法具有提高零维燃烧模型精度、减少计算时间及对初值的要求、避免病态矩阵和复数结果出现的优点.An improved algorithm combining the simulated annea- ling algorithm with the Levenberg-Marquardt algorithm was pro- posed , and then optimized the zero-dimensional combustion model. Taking the deviation of the predicted values and meas- ured values and the curve of the goodness of fit as measure stand- ards, the comparison is carrried out between the improved algo- rithm and the traditional algorithm. Results show that the im- proved algorithm has such advantages as increasing the accuracy of zero-dimensional combustion modeling, shortening the compu- tation time and mitigating the requirement on the initial values, as well as avoiding the ill-conditioned matrix and complex re- suits.

关 键 词：柴油机 燃烧放热率 数值模拟 模拟退火算法 阻尼最小二乘算法 韦伯函数 零维模型 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]