CAJ | 학술논문

目的：应用计算流体动力学多相流分析技术，探究不同结构对血泵性能的影响。方法设计2种不同结构的离心式血泵，引入CED软件中的Interface概念，相同工况下，进行多相流模拟，通过流场的速度矢量分布、剪切应力云图等分析血泵的水力性能和溶血性能。结果流量Q=6.24 L/min，供压100 mmHg工况下，12只斜直叶片（XZ）结构的血泵转速为1950 rpm＜8只流线型叶片（L）结构的2082 rpm。2种结构内部流场流动情况良好，结构L内部最大速度6.33 m/s＞XZ结构的5.44 m/s。XZ和L结构剪切应力＞150 Pa的区域分别为0.0022%和0.2060%。结论 XZ结构的血泵在水力性能和溶血性能上均有较好的表现，简单圆弧流线型叶片在降速和减压方面需进一步改进。
목적：응용계산류체동역학다상류분석기술，탐구불동결구대혈빙성능적영향。방법설계2충불동결구적리심식혈빙，인입CED연건중적Interface개념，상동공황하，진행다상류모의，통과류장적속도시량분포、전절응력운도등분석혈빙적수력성능화용혈성능。결과류량Q=6.24 L/min，공압100 mmHg공황하，12지사직협편（XZ）결구적혈빙전속위1950 rpm＜8지류선형협편（L）결구적2082 rpm。2충결구내부류장류동정황량호，결구L내부최대속도6.33 m/s＞XZ결구적5.44 m/s。XZ화L결구전절응력＞150 Pa적구역분별위0.0022%화0.2060%。결론 XZ결구적혈빙재수력성능화용혈성능상균유교호적표현，간단원호류선형협편재강속화감압방면수진일보개진。
Objective To explore the impacts of different structures on the performance of blood pump by using the CFD multi-phase lfow analysis technique.Methods The centrifugal blood pumps with two different structures were designed and introduced with Interface. Then under the same working condition, the multi-phase lfow simulation on the pumps were conducted. The hydraulic performance and hemolytic properties of the blood pump were analyzed by examining the distribution of the lfow ifeld velocity vector and the shear stress cloud.Results Under the condition thatQ=6.24 L/min, and the supply pressure 100 mmHg, the rotational speed of the blood pump with XZ structure was 1950 rpm, lower than that speed (2082 rpm) with L structure. The lfow inside the two structures worked well. However, the highest speed inside L was 6.33 m/s, higher than that speed of XZ (5.44 m/s). The area with its shear stress larger than 150 Pa covered respectively 0.0022% and 0.206% respectively in XZ structure and L structure.Conclusion The pump with XZ structure showed better hydraulic performance and hemolytic properties. But the simple arc streamlined blades required for further improvements in deceleration and decompression.