北京生物醫(yī)學(xué)工程

脈動(dòng)流實(shí)驗(yàn)裝置研究

An Experimental Device for Creating Pulsatile Flow

作者：李曉陽(yáng) 張欣邵楠

單位：北京工業(yè)大學(xué)機(jī)械工程與應(yīng)用電子技術(shù)學(xué)院(北京100124)

關(guān)鍵詞：脈動(dòng)流；壓力；流量；測(cè)量

分類號(hào)：

出版年·卷·期（頁(yè)碼）：2010·29·4（378-383）

摘要：

為了進(jìn)一步研究脈動(dòng)流的壓力和流量分布規(guī)律，本文設(shè)計(jì)了一套可以產(chǎn)生脈動(dòng)流，并可進(jìn)行彈性管道內(nèi)流體壓力和流量測(cè)量的實(shí)驗(yàn)裝置。首先參照工業(yè)用液壓系統(tǒng)的原理，利用單片機(jī)89S51控制電磁閥的開(kāi)關(guān)頻率，得到入口流脈動(dòng)頻率；再利用LabVIEW編寫(xiě)采集程序，得到管道內(nèi)流體壓力及流量的測(cè)量數(shù)據(jù)。通過(guò)初步測(cè)試及數(shù)據(jù)結(jié)果分析得出壓力與流量的不同分布特征，即入口流脈動(dòng)頻率增加時(shí)，流量增加，管壁受到的壓力也增大；對(duì)于相同的入口脈動(dòng)頻率，隨著與動(dòng)力源距離的增加，壓力減小，流量沒(méi)有顯著變化。本文測(cè)試結(jié)果將為進(jìn)一步的臨床實(shí)驗(yàn)提供有效實(shí)驗(yàn)依據(jù)。

To achieve the pressure and flow rate characters of pulsatile flow, this paper designs a experimental measurement system which is used to simulate and measure the pressure and flow rate of fluid in the flexible pipeline. On the basis of theory about hydraulic pressure system used in industry, the pulsatile flow with a certain frequency was completed at the inlet of system when a magnetic valve was controlled in the same frequency by singlechip 89S51. The software of an acquisition program was designed in LabVIEW, which was used for measuring the values of the pressure and flow rate with different pulsatile frequencies of entrance flow. The characters of pressure and flow rate in a pulsatile flow circuit were obtained and analyzed in the preliminary experiments. It was indicated that the pressure and flow rate obviously increased with the increase of pulsatile frequencies of entrance flow. In a same frequency, along with the power supply distance’s increase, the pressure value reduced, but the flow rate did not change remarkably.

參考文獻(xiàn)：

［1］Srinivasacharya D,Srikanthb D. Effect of couple stresses on the pulsatile flow through a constricted annulus ［J］. Comptes Rendus Mécanique, 2008, 336:820-827.
［2］Sankar DS,Hemalatha K. Pulsatile flow of HerschelBulkley fluid through stenosed arteries—Amathematical model ［J］. International Journal of NonLinear Mechanics, 2006, 41:979-990.
［3］zdinc SM,Carpinlioglu,Mehmet Yasar Gündogdu. Presentation of a test system in terms of generated pulsatile flow characteristics ［J］. Flow Measurement and Instrumentation, 2001, 12:181-190U.
［4］Siddiqui NK,Mishra VS, Gupta RS. Mathematical modelling of pulsatile flow of Casson’s fluid in arterial stenosis ［J］. Applied Mathematics and Computation, 2009, 210:1-10.
［5］Mehrdad Massoudi,Phuoc TX. Pulsatile flow of blood using a modified secondgrade fluid model ［J］. Computers and Mathematics with Applications, 2008, 56:19-21.
［6］喬愛(ài)科，伍時(shí)桂.主動(dòng)脈弓內(nèi)脈動(dòng)流的有限元分析［J］.生物醫(yī)學(xué)工程學(xué)雜志，2001，18(4)：583-588.
［7］王雪芳.彈性動(dòng)脈血管內(nèi)血液流場(chǎng)數(shù)值模擬及有限元分析［J］.西北工業(yè)大學(xué)學(xué)報(bào)，2004， 22 (2)：180-183.

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