Korakianitis Theodosios, Rezaienia Mohammad A, Paul Gordon M, Rahideh Akbar, Rothman Martin T, Mozafari Sahand
From the *Parks College of Engineering, Aviation and Technology, Saint Louis University, St. Louis, Missouri; †School of Engineering and Materials Science, Queen Mary University of London, London, United Kingdom; ‡Shiraz University of Technology, School of Electrical and Electronic Engineering, Shiraz, Iran; and §Department of Cardiology, Barts and the London NHS Trust, London Chest Hospital, London, United Kingdom.
ASAIO J. 2016 Sep-Oct;62(5):545-51. doi: 10.1097/MAT.0000000000000393.
The application of artificial mechanical pumps as heart assist devices impose power and size limitations on the pumping mechanism, and therefore requires careful optimization of pump characteristics. Typically new pumps are designed by relying on the performance of other previously designed pumps of known performance using concepts of fluid dynamic similarity. Such data are readily available for industrial pumps, which operate in Reynolds numbers region of 10. Heart assist pumps operate in Reynolds numbers of 10. There are few data available for the design of centrifugal pumps in this characteristic range. This article develops specific speed versus specific diameter graphs suitable for the design and optimization of these smaller centrifugal pumps concentrating in dimensions suitable for ventricular assist devices (VADs) and mechanical circulatory support (MCS) devices. A combination of experimental and numerical techniques was used to measure and analyze the performance of 100 optimized pumps designed for this application. The data are presented in the traditional Cordier diagram of nondimensional specific speed versus specific diameter. Using these data, nine efficient designs were selected to be manufactured and tested in different operating conditions of flow, pressure, and rotational speed. The nondimensional results presented in this article enable preliminary design of centrifugal pumps for VADs and MCS devices.
将人工机械泵用作心脏辅助装置时，泵送机制存在功率和尺寸限制，因此需要仔细优化泵的特性。通常，新泵的设计依赖于其他已知性能的先前设计泵的性能，采用流体动力学相似性概念。此类数据在工业泵中很容易获得，工业泵在雷诺数为10的区域运行。心脏辅助泵在雷诺数为10的条件下运行。在这个特性范围内，离心泵设计可用的数据很少。本文绘制了比转速与比直径的关系图，适用于这些较小离心泵的设计和优化，这些离心泵的尺寸适合心室辅助装置（VAD）和机械循环支持（MCS）装置。采用实验和数值技术相结合的方法，对100台为此应用设计的优化泵的性能进行了测量和分析。数据以无量纲比转速与比直径的传统科迪埃图形式呈现。利用这些数据，选择了九种高效设计进行制造，并在不同的流量、压力和转速运行条件下进行测试。本文给出的无量纲结果有助于心室辅助装置和机械循环支持装置离心泵的初步设计。
