平头旋转壳撞水水弹性实验的研究

制作一个钢质锥柱形平头旋转壳体,使用中国船舶科学研究中心的冲击水池,采用自由落体投放,拖长线测量方法,测定撞水压力、撞水加速度及撞水应变.由测值得出乎头旋转体入水的峰压与初速成正比关系,P=1.016 1.139υο,并实测出体现水弹性各参量关系的时程曲线.     

血液锥形分离杯内血液流动稳定性的边界摄动解

本文首次用边界摄动方法求解了二相同角速度转动的圆锥面间(窄间隙)均质流体的流动,和锥面间流动稳定性,证实了在小轴向Re数、窄间隙血液分离杯中血液流动的稳定性.并进而采用一种新的数学技巧证实了二相同角速度转动的圆柱面间(窄间隙)流动流体动力稳定性. 理论分析得到上海医疗器械研究所实验的证实.     

A hydrodynamic design of the flooding port of cell separator blood processor and the physical parameters affecting the blood separation

On the basis of “A Boundary Perturbation Solution for the Hydrodynamic Stability of Blood Flow in a Cone-Type Blood Processor“, this paper analyses the phenomenon of the stratified blood compositions being mixed again. This phenomenon occurs in the process of trial-producing with the blood processor. This paper puts forward a reasonable shape of the flooding port and analyses the various physical parameters affecting the blood separation. These theoretical analyses are verified by the results of the laboratory experiments which were made by Shanghai Medical Instruments Institute. Published in “Applied Mathematics and Mechanics (Vol. 4, No. 4)”.     

气泡运动与舰船设备冲击振动关系的试验验证

水下爆炸对舰船的影响研究已经有一个半世纪的历史了.由于水下爆炸和舰船动态响应的复杂性,对舰船水下爆炸动响应的认识的深刻程度主要来自试验现象和试验数据的分析.而试验数据的精确程度取决于技术的进步,取决于品质优良的传感器及高速度和高精度记录器的问世和进步.由于水下爆炸冲击波和二次压力波早已经在水下爆炸试验测量中被发现,因此,在舰船和设备水下爆炸动响应的理论分析和计算过程中只将药包水下爆炸的冲击波作为主要外力,有时也考虑二次压力波的作用.也有人在研究中发现,气泡的运动有时对于舰船设备的运动是重要的.我们于1995年在浮动冲击平台水下爆炸试验中发现"水下爆炸气泡膨胀产生的滞后流是使安装频率为数十赫兹的舰船设备产生冲击振动的主要能源".近年来,发表的水下爆炸气泡运动的研究文献增多,但是,基本没有涉及气泡运动与舰船设备冲击振动的关系.在2003年的圆筒模型水下爆炸试验研究中,我们换了一种角度,用更加简明有力的证据,验证了上述结论.显然,这一发现不仅对于建立正确的理论计算力学模型有重要作用,甚至对于舰船防护的研究乃至水中兵器的研究都有着重要意义.     

A HYDRODYNAMIC DESIGN OF THE FLOODING PORT OF CELL SEPARATOR BLOOD PROCESSOR AND THE PHYSICAL PARAMETERS AFFECTING THE BLOOD SEPARATION

On the basis of“A Boundary Perturbation Solution for theHydrodynamic stability of Blood Flow in a Cone-Type Blood Pro-cessor”**,this paper analyses the phenomenon of the stratifiedblood compositions being mixed again.This phenomenon occursin the process of trial-producing with the blood processor.Thispaper puts forward a reasonable shape of the flooding port andanalyses the various physical parameters affecting the bloodseparation.These theoretical analyses are verified by the results of thelaboratory experiments which were made by Shanghai Medical Instru-ments Institute.     

A boundary perturbation solution for the hydrodynamic stability of blood flow in a conetype blood processor

This paper may be the first attempt to solve the flow-field ofhomogeneous fluid between concentric cones(narrow gap)withequal angular velocities of rotation by using a boundary per-turbation method,and the hydrodynamic stability of blood flowin the cone-type blood processor is verified,under conditionsof the narrow gap between the cones and small axial Re numbers.This paper also verifies the hydrodynamic stability betweenconcentric cylinders(narrow gap)with equal angular veloci-ties of rotation by using a new mathematical technic.These theoretical analyses are in agreement with the ex-perimental observations,which have been made by Shanghai Me-dical Instruments Institute.     

血液分离杯溢口的流体动力设计及影响血液分离的物理参数

本文在“血液锥形分离杯内血液流动稳定性的边界摄动解”[1]的分析基础上,对血液分离杯研制过程中出现的“已分层血液成份重新相混”的现象进行了分析,提出了合理的溢口几何形状,并分析了影响血液分离的各项物理参数. 理论分析得到上海医疗器械研究所实验的证实.