李宗瑞
,
陆钟武
金属学报
通过把物料的加热过程视作控制理论中调节器的最优控制对象,结合物料加热过程的最优准则,建立了准则约束的优化方法,利用这一方法不仅可以解决物料加热的分布供热的优化问题,而且也为时变供热问题的优化提供了理论依据,这种方法在均热炉上应用的结果表明:与钢锭加热过程预示模型的计算结果相比,优化后热效率可提高3.1％;与热流分解的优化方法相比、热效率从43.1％提高到43.8％;与实际加热过程相比,可降低能耗7.28％。
关键词:
加热
,
heating process
,
control theory
,
optinal criterion
厉海涛
,
宋立明
,
李颖晨
,
丰镇平
工程热物理学报
基于控制理论的气动优化方法的计算量与设计变量无关,可快速精确地完成控制变量的灵敏度分析.本文以出口熵增最小为目标函数,详细推导了二维 N-S 方程伴随系统的偏微分方程组及其相应的边界条件和敏感性导数的表达式.以拟牛顿算法为优化求解器,利用 CFD 方法求解流动变量,采用时间推进方法求解伴随方程,建立了基于黏性伴随方法和 N-S 方程的二维叶栅气动优化设计算法.
关键词:
气动优化
,
控制理论
,
黏性伴随方程
,
熵增
LI Zongrui LU Zhongwu Northeast University of Technology
,
Shenyang
,
China
金属学报(英文版)
A criterion restraining mehod adopted to the dynamic optimization for materials heat- ing process has been developed,by regarding it as controlled object of a regulator in control theory and combining the optimal criterion of it.The method may be available to optimize fuel supply along furnace length and to provide a theoretical basis for the optimization of fuel supply in time-varying.For soaking pit,the calculation shows that in case of optimization by criterion restraining method,the thermal efficiency is 3.1 higher than the modelling prediction result.In comparison with heat flux-decomposing method,the thermal efficiency increased from 43.1 to 43.8%,and the energy consumption was reduced by 7.28% relative to the practical production data.
关键词:
optimization
,
null
,
null
,
null
