DEVELOPING FLOWS AND DEVELOPED FLOWS

This paper puts cmphasis on the problem of the developing flows in the circular tube under oscillatory conditions. According to the Navicr-Stokes' equations and using the method of Bessel function of imaginary argument, a system of formulsas is obtained. Comparing the formulas obtained in this paper with Atabek's formulas, it may, be seen that the former is simpler and more convenient. When both the formulas obtained in this paper and Atabek's formulas are reduced to the representation of developed flows, both of them are consistent. Numerical calculation results show that the computed results obtained in this paper are rather consistent with both Atabek's computed results and the experimental results.     

BOUNDARY LAYER DEVELOPMENT OF PULSATILE BLOOD FLOW IN A TAPERED VESSEL

Assuming that the tapered angle is small,the problems of developing flow under unsteady oscillatory condition are studied in this paper.The formula of velocity distribution is obtained.The analyses for the results show that the blood flow in a converging tapered vessel remains a developing flow throughout the length,and the effects of tapered angle on the developing flow are increased with the increment of the tapered angle.     

THE COUPLE MOTION BETWEEN VESSEL WALL AN DBLOOD IN THE ENTRANCE REGION OF A TAPERED VESSEL

ＴＨＥＣＯＵＰＬＥＭＯＴＩＯＮＢＥＴＷＥＥＮＶＥＳＳＥＬＷＡＬＬＡＮＤＢＬＯＯＤＩＮＴＨＥＥＮＴＲＡＮＣＥＲＥＧＩＯＮＯＦＡＴＡＰＥＲＥＤＶＥＳＳＥＬＣｅｎＲｅｎ－ｊｉｎｇ（岑人经）ＱｉｎＣｈａｎ（秦婵）ＴａｎＺｈｅ－ｄｏｎｇ（谭哲东）（ＳｏｕｔｈＣ...     

发展流动与形成流动

本文着重研究振荡状态下的管流问题.从基本的Navier-Stokes方程出发,进行线性化之后采用虚宗量Bessel函数的方法求解,得出了一组描述圆管振荡状态下发展流动的速度分布、压力分布公式.它们较之Atabek等人推导的公式更为简明和易于计算.并且,在相同的条件下简化为形成流动的表达式后,两者的公式完全一致.数值计算还表明,本文公式的理论结果无论是和Atabek等人的理论计算结果比较,还是和他们的实验结果比较,都是相当一致的.     

一种带可调光照部分的专用彩色图像处理系统

介绍了肺癌介入治疗模拟实验的专用彩色图像处理系统 ,硬件由可调光照部分、CCD摄像头、视频采集卡和微机四大部分构成。软件不仅可以进行一般的数字图像处理 ,而且针对肺癌介入治疗模拟实验中的特殊要求 ,设计了比例测量、导管口跟踪等专用功能。该系统除了用于肺癌介入治疗模拟实验 ,还可用做指导临床介入治疗 ,具有乐观的应用前景。     

THE STRESS ANALYSIS OF VESSEL WALL IN THE ENTRANCE REGIONOF A TAPERED VESSEL

ＴＨＥＳＴＲＥＳＳＡＮＡＬＹＳＩＳＯＦＶＥＳＳＥＬＷＡＬＬＩＮＴＨＥＥＮＴＲＡＮＣＥＲＥＧＩＯＮＯＦＡＴＡＰＥＲＥＤＶＥＳＳＥＬＣｅｎＲｅｎ－Ｊｉｎｇ（岑人经）ＴａｎＺｈｅ－ｄｏｎｇ（谭哲东）ＣｈｅｎＺｈｅｎｇ－ｚｏｎｇ（陈正宗）（ＳｏｕｔｈＣｈｉｎ...     

THE BLOOD FLOW AND THE MOTION OF VESSEL WALL

The correlation problem between the blood fiow and the motion of vessel wall in the mammalian circulatory system is discussed in this paper. Supposing the blood flow is under the stable oscillatory condition, a set of formulas for velocity distribution, pressure distribution, displacement of vessel wall and constraining stress are obtained. Kuchar's formulas are extended from steady flow to unsteady oscillatory flow by means of the formulas obtained in this paper. The problem of elasticity effect of vessel wall is also discussed.     

计算动脉血管发展流动的新差分格式

在引用守恒型N—S方程和SIMPLE方法的基础上，对血管发展流动的控制方程提出了新的差分格式。算例结果表明：本差分格式对血管发展流动的数值研究是可行的。