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Studies on Rotating Disc Flow in Narrow Clearance For Low Specific Speed-Small Centrifugal Magnetically suspended Blood Pump

Research Project

Project/Area Number 12650185
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionSETSUNAN UNIVERSITY

Principal Investigator

AKAMATSU Teruaki  Setsunan Univ., Dept. of Meek. Eng., Professor, 工学部, 教授 (40025896)

Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2001: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2000: ¥2,700,000 (Direct Cost: ¥2,700,000)
KeywordsRotating Disc / Magnetic Suspension / Centrifugal Blood Pump / Leak Flow / Pump Efficiency / 回転円板流れ / ポンプ漏れ流量 / ポンプ特性
Research Abstract

This study treats with one of research subjects for development of a centrifugal blood pump with magnetically suspended impellers as an artificial heart of next generation. This kind of pump is so small, compared with conventional industrial pumps, that blood viscousity much influences on flows in the pump.
Power loss due to friction and leakage in the shroud clearance is dominant. So the flow in this shroud clearance is investigated. This is so called "the problems on viscous flow around rotating disc".
The following three factors influence on this clearance flow : (l) pump pressure difference between outlet and inlet, (2) centrifugal force induced by rotating disc, (3) jet pump effect induced by pump I main flow.
Though the flow, in the actual pump, leaks back through the shroud clearance from outlet side to inlet side of the impeller, a part of the pump casing is modified to bypass the leak flow, then to measure flow rate and return to the inlet side of the impeller.
Experimental results shows the above three effects - leakage is surpressed by centrifugal effects at high rotational speed of impeller and by jet pump effect at high main flow rate. Of cause, leakage depends on pressure difference.
In addition, the pressure distributions around outer edge and inner edge of the impeller are measured as the boundary conditions. This impeller was replaced by a blind disc, and the leakage flows were compared with double volute and without volute (open outlet). This flow indicated the above mentioned two effects (l), (2) and the angular momentum effect through spiral volute.

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 赤松映明: "磁気浮上遠心血液ポンプの開発研究"ターボ機械. 29・1. 7-16 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] T. AKAMATSU: "Development of Centrifugal Blood Pump with Magnetically Suspended Impellers"Turbo-Machinery. 29-1. 7-16 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 赤松映明: "磁気浮上遠心血液ポンプの開発研究"ターボ機械. 29・1. 7-16 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] W.K,chan,T.Akamatsu et al 1: "Analytical Investigation of Leakage Flow in Disk Clearance of a Magnetically Suspended Centrifugal Impeller"Artificaial Organs. 24・9. 734-742 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Kono,T.Akancatsu et al 3: "Hemodynamics on Abrupt stoppage of Centrifugal Pumps During Left Ventricular Assist"Amerian society of Artificial Internal Organs, Journal. 46. 600-603 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] K.Nishimura,T.Akamatsu et al 4: "Development of Compact Venticlllar Assist Device for Chronical Use"Japanese Society of Artificial Organs. 3. 85-90 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 赤松映明: "磁気浮上遠心血液ポンプの開発研究"ターボ機械. 1. 7-16 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] T,Akamatsu 分担執筆: "Rotary Blood Pumps ; Fluid Engineering Aspects for Development of centrifugal Blood Pump"ed,H,Matsuda, springer,Tokyo. 35-46 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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