A Numerical Analysis of Pressure Pulsation Characteristics Induced by Unsteady Blood Flow in a Bileaflet Mechanical Heart Valve

doi:10.3390/pr7040232

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	A Numerical Analysis of Pressure Pulsation Characteristics Induced by Unsteady Blood Flow in a Bileaflet Mechanical Heart Valve
	Xu, Xiao-gang 1,2; Liu, Tai-yu 1; Li, Cheng 1; Zhu, Lu 1; Li, Shu-xun 1
刊名	PROCESSES
	2019-04
卷号	7 期号:4
关键词	bileaflet mechanical heart valve computational fluid dynamics pressure pulsation unsteady flow hemodynamics
ISSN号	2227-9717
DOI	10.3390/pr7040232
英文摘要	The leaflet vibration phenomenon in bileaflet mechanical heart valves (BMHVs) can cause complications such as hemolysis, leaflet damage, and valve fracture. One of the main reasons for leaflet vibration is the unsteady blood flow pressure pulsation induced by turbulent flow instabilities. In this study, we performed numerical simulations of unsteady flow through a BMHV and observed pressure pulsation characteristics under different flow rates and leaflet fully opening angle conditions. The pressure pulsation coefficient and the low-Reynolds k- model in CFD (Computational Fluid Dynamics) software were employed to solve these problems. Results showed that the level of pressure pulsation was highly influenced by velocity distribution, and that the higher coefficient of pressure pulsation was associated with the lower flow velocity along the main flow direction. The influence of pressure pulsation near the trailing edges was much larger than the data obtained near the leading edges of the leaflets. In addition, considering the level of pressure pulsation and the flow uniformity, the recommended setting of leaflet fully opening angle was about 80 degrees.
资助项目	National Natural Science Foundation of China[51569012] ; Fundamental Research Funds for Colleges and Universities in Gansu province[20146302]
WOS研究方向	Engineering
语种	英语
出版者	MDPI
WOS记录号	WOS:000467771400055
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/31995]
专题	石油化工学院
通讯作者	Li, Shu-xun
作者单位	1.Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Gansu, Peoples R China 2.Machinery Ind Pump & Special Valve Engn Res Ctr, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Xu, Xiao-gang,Liu, Tai-yu,Li, Cheng,et al. A Numerical Analysis of Pressure Pulsation Characteristics Induced by Unsteady Blood Flow in a Bileaflet Mechanical Heart Valve[J]. PROCESSES,2019,7(4).
APA	Xu, Xiao-gang,Liu, Tai-yu,Li, Cheng,Zhu, Lu,&Li, Shu-xun.(2019).A Numerical Analysis of Pressure Pulsation Characteristics Induced by Unsteady Blood Flow in a Bileaflet Mechanical Heart Valve.PROCESSES,7(4).
MLA	Xu, Xiao-gang,et al."A Numerical Analysis of Pressure Pulsation Characteristics Induced by Unsteady Blood Flow in a Bileaflet Mechanical Heart Valve".PROCESSES 7.4(2019).