以带运动抑制结构的圆筒型浮式生产储卸油装置(Cylindrical Floating Production Storage and Offloading,CFPSO)为研究对象,在低速风洞中对CFPSO流载荷进行测量。为获得均匀流并减少边界层的影响,采用距离地面一定高度的小地板。热线...以带运动抑制结构的圆筒型浮式生产储卸油装置(Cylindrical Floating Production Storage and Offloading,CFPSO)为研究对象,在低速风洞中对CFPSO流载荷进行测量。为获得均匀流并减少边界层的影响,采用距离地面一定高度的小地板。热线测量结果表明,采用小地板能够获得更均匀的流剖面。通过风洞试验对4种不同型式的运动抑制结构流载荷进行测量,进一步采用数值模拟方法对不同型式运动抑制结构的尾流场进行分析。结果表明:运动抑制结构通过对尾涡的限制,减少能量损耗,实现减阻效果。研究结果可为运动抑制结构的设计提供一定的参考。展开更多
We study the generation of nonlinear plasma wake fields by intense laser pulses,using an Eulerian code for the numerical solution of the fully relativistic onedimensional(1D)Vlasov-Maxwell equations.The examination of...We study the generation of nonlinear plasma wake fields by intense laser pulses,using an Eulerian code for the numerical solution of the fully relativistic onedimensional(1D)Vlasov-Maxwell equations.The examination of the phase-space of the distribution function allows to study without numerical noise aspects of the particle acceleration by the wake-field generated by intense laser pulses,in the very low density regions of the phase-space.We study the effect of the thermal spread on the existence of accelerated beams,and we compare between results obtained from a circularly polarized wave and a linearly polarized wave.展开更多
文摘以带运动抑制结构的圆筒型浮式生产储卸油装置(Cylindrical Floating Production Storage and Offloading,CFPSO)为研究对象,在低速风洞中对CFPSO流载荷进行测量。为获得均匀流并减少边界层的影响,采用距离地面一定高度的小地板。热线测量结果表明,采用小地板能够获得更均匀的流剖面。通过风洞试验对4种不同型式的运动抑制结构流载荷进行测量,进一步采用数值模拟方法对不同型式运动抑制结构的尾流场进行分析。结果表明:运动抑制结构通过对尾涡的限制,减少能量损耗,实现减阻效果。研究结果可为运动抑制结构的设计提供一定的参考。
基金The constant support and interest of Dr.Andr´e Besner is gratefully acknowledged。
文摘We study the generation of nonlinear plasma wake fields by intense laser pulses,using an Eulerian code for the numerical solution of the fully relativistic onedimensional(1D)Vlasov-Maxwell equations.The examination of the phase-space of the distribution function allows to study without numerical noise aspects of the particle acceleration by the wake-field generated by intense laser pulses,in the very low density regions of the phase-space.We study the effect of the thermal spread on the existence of accelerated beams,and we compare between results obtained from a circularly polarized wave and a linearly polarized wave.
