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無葉片離心泵結(jié)構(gòu)對(duì)體外循環(huán)關(guān)鍵參數(shù)的影響

Effects of Vaneless Centrifugal Pump Structure on Key Parameters in Extracorporeal Circulation

作者: 胡兆燕  潘友聯(lián)  陳正龍  路力軍 
單位:上海理工大學(xué)機(jī)械工程學(xué)院(上海200093)
關(guān)鍵詞: 體外循環(huán);心肺轉(zhuǎn)流;無葉片離心泵;計(jì)算流體動(dòng)力學(xué) 
分類號(hào):
出版年·卷·期(頁碼):2011·30·5(462-466)
摘要:

目的 探討無葉片離心泵結(jié)構(gòu)和體外循環(huán)關(guān)鍵參數(shù)之間的關(guān)系,為無葉片離心泵的優(yōu)化設(shè)計(jì)提供理論依據(jù)
和實(shí)踐參考。方法 采用計(jì)算流體動(dòng)力學(xué)(computational fluid dynamics,CFD)方法對(duì)無葉片離心泵
進(jìn)行數(shù)值模擬,分析離心泵的結(jié)構(gòu)和轉(zhuǎn)速與血液流量、泵內(nèi)流動(dòng)狀態(tài)、預(yù)充量之間的關(guān)系。結(jié)果 葉輪與
蝸殼之間距離一定時(shí),兩層葉輪結(jié)構(gòu)比一層葉輪結(jié)構(gòu)驅(qū)動(dòng)血液能力強(qiáng),但是預(yù)充量大;進(jìn)出口導(dǎo)管直徑
小,有利于調(diào)節(jié)流量;泵體結(jié)構(gòu)和葉輪轉(zhuǎn)速影響泵內(nèi)的血液速度分布,從而會(huì)對(duì)血液造成不同程度的破
壞。結(jié)論 無葉片離心泵結(jié)構(gòu)和葉輪轉(zhuǎn)速對(duì)體外循環(huán)流量的控制、泵內(nèi)血液速度分布、預(yù)充量有很大影響。

Objective In order to supply the theoretic proof and reference for optimal
designing vaneless centrifugal pump,the relationship between the structure of vaneless
centrifugal pump and key parameters in extracorporeal circulation were explored.Methods The
calculation model of vaneless centrifugal pump was simulated and validated in terms of key
performance parameters such as pump’s structure,rotation speed,flow rate,flow state in
pump,and prime volume by the method of computational fluid dynamics (CFD).Results The
centrifugal pump with two layer of impeller was more powerful,however with more prime
volume in pumping blood,than that with one in the same rotation speed.The pump with a
smaller pipe diameter was favorable for changing the flow rate.The structure and rotation
speed greatly affected the velocity distribution in the pump.Conclusions The structure and
rotation speed of vaneless centrifugal pump make a great impact on the control strategies
of flow,velocity distribution and prime volume.

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