In order to study the major performance indicators of the twin-rotor piston engine(TRPE), Matlab/simulink was used to simulate the mathematical models of its thermodynamic processes. With consideration of the characte...In order to study the major performance indicators of the twin-rotor piston engine(TRPE), Matlab/simulink was used to simulate the mathematical models of its thermodynamic processes. With consideration of the characteristics of the working processes in the TRPE, corresponding differential equations were established and then simplified by period features of the TRPE. Finally, the major boundary conditions were figured out. The changing trends of mass, pressure and temperature of working fuel in the working chamber during a complete engine cycle were presented. The simulation results are consistent with the trends of an actual working cycle in the TRPE, which indicates that the method of simulation is feasible. As the pressure in the working chamber is calculated, all the performance parameters of the TRPE can be obtained. The major performance indicators, such as the indicated mean effective pressure, power to weight ratio and the volume power, are also acquired. Compared with three different types of conventional engines, the TRPE has a bigger utilization ratio of cylinder volume, a higher power to weight ratio and a more compact structure. This indicates that TRPE is superior to conventional engines.展开更多
有色金属工业发展正面临资源、能源与环境的严重制约,而有色冶金过程建模与优化是实现有色冶金生产节能降耗减排的关键技术之一.论文从有色冶金过程的特点出发,首先探讨了有色冶金过程的机理建模、连续搅拌釜式反应器(Continuous stirre...有色金属工业发展正面临资源、能源与环境的严重制约,而有色冶金过程建模与优化是实现有色冶金生产节能降耗减排的关键技术之一.论文从有色冶金过程的特点出发,首先探讨了有色冶金过程的机理建模、连续搅拌釜式反应器(Continuous stirred tank reactor,CSTR)模型和智能集成建模的理论与方法,提出了智能集成建模的描述方法,归纳了模型的集成形式,给出了工业应用上的几类智能集成模型;然后围绕有色冶金过程工程优化,讨论了操作模式优化、软约束调整满意优化、多目标智能优化等方法,并阐述了大型湿法炼锌电解过程的综合优化控制技术;最后探讨了有色冶金过程建模与优化所面临的新挑战.展开更多
基金Project(7131109)supported by the National Defense Pre-research Foundation of ChinaProject(51175500)supported by the National Natural Science Foundation of China
文摘In order to study the major performance indicators of the twin-rotor piston engine(TRPE), Matlab/simulink was used to simulate the mathematical models of its thermodynamic processes. With consideration of the characteristics of the working processes in the TRPE, corresponding differential equations were established and then simplified by period features of the TRPE. Finally, the major boundary conditions were figured out. The changing trends of mass, pressure and temperature of working fuel in the working chamber during a complete engine cycle were presented. The simulation results are consistent with the trends of an actual working cycle in the TRPE, which indicates that the method of simulation is feasible. As the pressure in the working chamber is calculated, all the performance parameters of the TRPE can be obtained. The major performance indicators, such as the indicated mean effective pressure, power to weight ratio and the volume power, are also acquired. Compared with three different types of conventional engines, the TRPE has a bigger utilization ratio of cylinder volume, a higher power to weight ratio and a more compact structure. This indicates that TRPE is superior to conventional engines.
文摘有色金属工业发展正面临资源、能源与环境的严重制约,而有色冶金过程建模与优化是实现有色冶金生产节能降耗减排的关键技术之一.论文从有色冶金过程的特点出发,首先探讨了有色冶金过程的机理建模、连续搅拌釜式反应器(Continuous stirred tank reactor,CSTR)模型和智能集成建模的理论与方法,提出了智能集成建模的描述方法,归纳了模型的集成形式,给出了工业应用上的几类智能集成模型;然后围绕有色冶金过程工程优化,讨论了操作模式优化、软约束调整满意优化、多目标智能优化等方法,并阐述了大型湿法炼锌电解过程的综合优化控制技术;最后探讨了有色冶金过程建模与优化所面临的新挑战.
