摘要
本文通过显微镜观察、激光测量、高速摄影等手段先后对圆形和矩形截面玻璃管内的血流进行了实验观察、测量和分析,得出了不可能利用普通照明光源对圆形玻璃管内血流红细胞形态进行观察的结论;后采用矩形玻璃管试验段、利用普通照明光源运用高速摄影技术通过显微镜,得到了壁面血流滑移速度的若干规律.
For decades, glass tubes of circular cross-section have been used to measure velocity distribution of flow simulating blood flow. The fluids used have contained either white or transparent particles. But to the authors' best knowledge, none has obtained the velocity close to the wall surface of such simulated flow. In this paper the authors present their discovery that rectangular cross-section instead of circular cross-section must be used when common light source and microscope are used in experimshts. This is because observation of red blood cell and measurement of velocity close to the wall surface under such conditions cannot be made when circular cross-section is used. Experiments are performed by making microscopic observations and laser measurements and taking high-speed photographs. When diluted blood is in circular glass tube and when light rays reach regions close to the wall surface, the light reflected from corpuscle scatters after passing through the wall of tube and real image cannot be formed at object glass of microscope. In the case of rectangular tube, only translation of reflected light occurs without distorting the observed object, thus shape of red blood cell close to the wall surface can be clearly observed with the aid of microscope. In order to eliminate layer of plasma near the wall surface, a very weak electromagnetic field is applied to two opposite sides of the rectangular tube. In this way the authors succeed in obtaining shape of red blood cell of flowing diluted blood and also its velocity near the wall surface.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
1993年第3期249-253,共5页
Journal of Northwestern Polytechnical University
基金
国家自然科学基金
关键词
高速摄影
玻璃管
血液流动
红细胞
red blood cell
velocity near wall surface
high- speed photograph
dilutet blood
