著者
山根 隆志 加藤 孝久 丸山 修 西田 正浩 大久保 剛 佐野 岳志 宮本 祐介
出版者
一般社団法人日本機械学会
雑誌
年次大会講演論文集 : JSME annual meeting
巻号頁・発行日
vol.2003, no.7, pp.79-80, 2003-08-05

A hydrodynamic levitation centrifugal pump is being developed for a long-term implantable artificial heart. The hemocompatibility was investigated with numerical analysis and has been verified with animal blood tests. The hemolytic property was improved by expanding the bearing gap and by adjusting the pressure balance and the antithrombogenicity has been improved by adding deep grooves to the hydrodynamic bearings to increase the flow rate through the bearings.
著者
阿部 守 佐野 岳志 松島 達人 吉田 義樹 辻本 良信
出版者
一般社団法人日本機械学会
雑誌
関西支部講演会講演論文集
巻号頁・発行日
vol.2002, no.77, pp."6-41"-"6-42", 2002

It is well known that a rotating stall in vaneless diffuser occurs at low flow rate. This report treats the rotating stall in a vaneless diffuser coupled with a impeller by using a commercial code with the standard κ-ε turbulence model. It was found that the rotating stall in the vaneless diffuser could be simulated, and the onset of the rotating stall in the impeller depends on the gradient of the impeller pressure performance curve. In case with a whirling impeller, whirling speed has influence on the number of stall cells in the diffuser
著者
杉山 大介 山根 隆志 西田 正浩 大久保 剛 佐野 岳志
出版者
一般社団法人日本機械学会
雑誌
茨城講演会講演論文集 : Ibaraki district conference
巻号頁・発行日
vol.2004, pp.233-234, 2004-09-23

The aim of this study is the fluid dynamic evaluation of a hydrodynamic levitation centrifugal pump developed by AIST. Since the Pump has a hydrodynamic bearing rotating at 1900rpm, we introduced a new high-speed visualization systems with Double-pulse YAG laser. Visualized sections were the impeller, and outlet regions. The result of flow visualization showed good correlation with animal experiment and CFD.