The major issues of Micro-Thermo-Photo-Voltaic(MTPV) micro-combustors are flame instabilities, which narrow the operational range, and non-uniform wall temperature, which lowers the overall efficiency. The purpose of ...The major issues of Micro-Thermo-Photo-Voltaic(MTPV) micro-combustors are flame instabilities, which narrow the operational range, and non-uniform wall temperature, which lowers the overall efficiency. The purpose of the present research is to propose a novel micro-combustor with combined baffle and cavity configuration to address these issues. For this aim, a numerical modeling approach is validated and used. The performance of the improved combustor is compared with another recent baffle-bluff configuration. It is shown that the novel design improves the average wall temperature by 36.4 K and mitigates its standard deviation by 13.4 K. Moreover, using the optimal baffle thickness, these enhancements can be augmented by 4% raise of average wall temperature, 62%increase of temperature uniformity, and 20% reduction in overall emission. The baffle length of 0.6 times the combustor length and thickness of 0.0625 times the baffle spacing result in the optimal operation due to the flame lift-off in the upstream direction. According to the sensitivity analysis, the most effective geometrical parameters are the baffle length and thickness. It is expected that using this novel micro-combustor with optimized design parameters improves the overall efficiency of MTPV systems.展开更多
研究了无人驾驶汽车采用电驱系统的技术优势,通过Matlab/Simulink仿真软件搭建了基于最大转矩电流比(Maximum Torque per Ampere,MTPA)控制、弱磁控制以及最大转矩电压比(Maximum Torque per Voltage,MTPV)控制的永磁同步电机(Permanent...研究了无人驾驶汽车采用电驱系统的技术优势,通过Matlab/Simulink仿真软件搭建了基于最大转矩电流比(Maximum Torque per Ampere,MTPA)控制、弱磁控制以及最大转矩电压比(Maximum Torque per Voltage,MTPV)控制的永磁同步电机(PermanentMagnet SynchronousMotor,PMSM)矢量控制模型。结果表明,电驱系统具有更理想的动力输出特性,即在不加多级减速器的情况下能够实现宽范围的恒功率输出,更容易实现无人驾驶过程中的驱动力闭环控制。展开更多
文摘The major issues of Micro-Thermo-Photo-Voltaic(MTPV) micro-combustors are flame instabilities, which narrow the operational range, and non-uniform wall temperature, which lowers the overall efficiency. The purpose of the present research is to propose a novel micro-combustor with combined baffle and cavity configuration to address these issues. For this aim, a numerical modeling approach is validated and used. The performance of the improved combustor is compared with another recent baffle-bluff configuration. It is shown that the novel design improves the average wall temperature by 36.4 K and mitigates its standard deviation by 13.4 K. Moreover, using the optimal baffle thickness, these enhancements can be augmented by 4% raise of average wall temperature, 62%increase of temperature uniformity, and 20% reduction in overall emission. The baffle length of 0.6 times the combustor length and thickness of 0.0625 times the baffle spacing result in the optimal operation due to the flame lift-off in the upstream direction. According to the sensitivity analysis, the most effective geometrical parameters are the baffle length and thickness. It is expected that using this novel micro-combustor with optimized design parameters improves the overall efficiency of MTPV systems.
文摘研究了无人驾驶汽车采用电驱系统的技术优势,通过Matlab/Simulink仿真软件搭建了基于最大转矩电流比(Maximum Torque per Ampere,MTPA)控制、弱磁控制以及最大转矩电压比(Maximum Torque per Voltage,MTPV)控制的永磁同步电机(PermanentMagnet SynchronousMotor,PMSM)矢量控制模型。结果表明,电驱系统具有更理想的动力输出特性,即在不加多级减速器的情况下能够实现宽范围的恒功率输出,更容易实现无人驾驶过程中的驱动力闭环控制。
