Structural design and optimization of centrifugal blood pumps based on computational fluid dynamics
10.3969/j.issn.1005-202X.2025.08.020
- VernacularTitle:基于计算流体力学的离心式血泵结构设计与优化
- Author:
Chun YANG
1
;
Bolin ZENG
1
;
Wuhan DONG
1
;
Ming GAO
1
Author Information
1. 上海理工大学能源与动力工程学院,上海 200093
- Publication Type:Journal Article
- Keywords:
magnetically levitated centrifugal blood pump;
computational fluid dynamics;
blade outlet angle;
impeller draft angle;
impeller channel slope;
hemolysis index
- From:
Chinese Journal of Medical Physics
2025;42(8):1114-1120
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effects of blade outlet angle,impeller channel slope and impeller draft angle on hemolytic performance and hydraulic performance in a magnetically levitated centrifugal blood pump using computational fluid dynamics,aiming to optimize these parameters for improving blood compatibility.Methods Numerical simulations of a magnetically levitated centrifugal blood pump were performed using Fluent to calculate the shear stress and head on blood cells during blood pump flow and to predict the hemolytic performance of the centrifugal blood pump.Results With the increase of the blade outlet angle to 60°,the percentage of the low shear stress from 0 to 150 Pa increased to 98.9%,and the percentage of the shear stress from 150 to 300 Pa decreased to 0.6%.The maximum reduction of hemolysis index of the blood pump was 28.89%with different combinations of the impeller channel slope and the impeller draft angle.Conclusion The increase of the blade outlet angle will effectively improve the shear stress distribution in the pump,thus reducing the hemolysis index.Comparing the positive effects of impeller draft angle and channel slope on the blood pump,the optimization of the channel slope can be prioritized.
