北京生物醫(yī)學(xué)工程

基于CFD技術(shù)的Sarns離心式血泵流動特性分析

Flow characteristics in Sarns centrifugal blood pump based on computational fluid dynamics technology

作者：程云章朱莉花張偉國

單位：上海理工大學(xué)醫(yī)療器械與食品學(xué)院(上海 200093)

分類號：

出版年·卷·期（頁碼）：2012·31·2（111-116）

摘要：

目的應(yīng)用專業(yè)計(jì)算流體動力學(xué)(computational fluid dynamics,CFD)分析軟件FLUENT，對一種具有長短葉片的Sarns離心式血泵的內(nèi)部流場進(jìn)行三維數(shù)值模擬。方法利用Solidworks軟件對Sarns型血泵進(jìn)行三維建模，然后對所建模型網(wǎng)格處理，通過選取標(biāo)準(zhǔn)κ-ε湍流模型和SIMPLE算法，具體分析了內(nèi)部流動狀態(tài)、壓力分布、壁面剪切力等流場特性。結(jié)果結(jié)果表明，該離心泵內(nèi)部流場分布較不勻，葉片及血泵出口處有回流和旋渦現(xiàn)象，剪切力大小基本處于致紅細(xì)胞破碎的臨界狀態(tài)之下，高轉(zhuǎn)速下剪切力最大，主要分布在葉輪區(qū)域，但暴露時間極短，基本滿足血液生理要求。結(jié)論該研究為Sarns血泵的進(jìn)一步優(yōu)化提供了理論基礎(chǔ)。

Objective To simulate the three-dimensional internal flow field of a Sarns blood centrifugal pump with long and short blades by using computational fluid dynamics (CFD) software FLUENT. Methods We used the software Solidworks to build a three-dimensional model and selected the standard κ-ε turbulence model and the SIMPLE algorithm to analyze the flow characteristics of the internal flow status,pressure distribution and wall shear force. Results The analysis result demonstrated that there were several deficiencies in this pump,such as uneven velocity distribution,partial backflow and whirlpool between the blades and near the outlet of the pump. The shear stress distribution was under the critical state of breaking red blood cells and the maximum value of shear stress appeared in the impeller area under high-rotational speed. As the exposure time was short,the shear stress distribution could basically meet the physiological requirements of blood. Conclusions This research offered a theoretic basis for the further optimization of Sarns blood pump.

參考文獻(xiàn)：

［1］Song XW,Wood HG. Computational fluid dynamics(CFD) study of the 4th generation prototype of a continuous flow ventricular assist device(VAD) ［J］. Transaction of the ASEM,2004,126(4):180-187.
［2］王芳群，曾培，茹偉民，等. 應(yīng)用CFD研究葉輪設(shè)計(jì)對人工心臟泵內(nèi)流場的影響［J］. 中國生物醫(yī)學(xué)工程學(xué)報,2005,24(5):578-582.
Wang FQ,Zeng P,Ru WM,et al. An investigation of effect of impeller design on flow patterns in blood pumps with CFD ［J］. Chinese Journal of Biomedical Engineering,2005,24(5):578-582.
［3］云忠，譚建平. 基于血液剪切損傷機(jī)理的高速螺旋血泵仿真分析［J］. 中山大學(xué)學(xué)報:自然科學(xué)版,2008,47(1):47-50.
Yun Z,Tan JP. Simulation analysis of the high-speed spiral blood pump based on the shear injure principle of blood［J］. Acta Scientiarum Naturalium Universitatis Sunyatseni,2008,47(1):47-50.
［4］李冰一，藺嫦燕. 關(guān)于葉輪血泵血栓問題的研究進(jìn)展［J］.國外醫(yī)學(xué)生物醫(yī)學(xué)工程分冊，2002,25（1）:43-46.
Li BY,Lin CY. Advances in research on the impeller blood pump’s thrombus formation［J］.International Journal of Biomedical Engineering，2002,25（1）:43-46.
［5］程云章，張偉國，駱賓海,等. 多級離心泵內(nèi)部流場數(shù)值模擬與節(jié)能技術(shù)研究［J］.水電能源科學(xué)，2010,28(10):115-117.
Cheng YZ,Zhang WG,Luo BH,et al. Research on numerical simulation of inside flow in multistage centrifugal pump and energy saving technology［J］. Water Resources and Power，2010,28(10):115-117.
［6］王福軍.計(jì)算流體動力學(xué)分析［M］. 北京：清華大學(xué)出版社，2004:8-12.
Wang FJ. Jisu Liuti Donglixue Fenxi［J］. Tsinghua University Press，2004:8-12.
［7］韓占忠，王敬，蘭小平. FLUENT流體工程仿真計(jì)算實(shí)例與應(yīng)用［M］. 北京：北京理工大學(xué)出版社，2004:1-26.
Han ZZ,Wang J,Lan XP. FLUENT Liuti Gongcheng Fangzhen Jisuan Shli Yu Yingyong［M］. Beijing:Beijing Institute of Technology Press，2004:1-26.
［8］Anderson JB,Wood HG,Allaire PE,Bearnson G,Khanwilkar P. Computational flow study of the continuous flow ventricular assist device,prototype number 3 blood pump［J］. Artificial Organs,2000,24:377-385.

服務(wù)與反饋：

【文章下載】【加入收藏】

提示：您還未登錄，請登錄！點(diǎn)此登錄

51黑料吃瓜在线观看,51黑料官网|51黑料捷克街头搭讪_51黑料入口最新视频