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| 1 | Unsteady Internal Flow Conditions of Mini-Centrifugal Pump with Splitter Blades显示文摘Mini centrifugal pumps having a diameter smaller than 100mm are employed in many fields. But the design method for the mini centrifugal pump is not established because the internal flow condition for these small-sized fluid machines is not clarified and conventional theory is not suitable for small-sized pumps. Therefore, mini centrifugal pumps with simple structure were investigated by this research. Splitter blades were adopted in this research to improve the performance and the internal flow condition of mini centrifugal pump which had large blade outlet angle. The original impeller without the splitter blades and the impeller with the splitter blades were prepared for experiment. The performance tests are conducted with these rotors in order to investigate the effect of the splitter blades on performance and internal flow condition of mini centrifugal pump. On the other hand, a three dimensional unsteady numerical flow analysis was conducted to investigate the change of the internal flow according to the rotor rotation. It is clarified from the experimental results that the performance of the mini centrifugal pump is improved by the splitter blades. The blade-to-blade low velocity region was suppressed in the case with the splitter blades. In addition to that, the unsteady flows near the volute casing tongue were suppressed due to the splitter blades. In the present paper, the performance of the mini centrifugal pump is shown and the unsteady flow condition is clarified with the results of the numerical flow analysis. Furthermore, the effects of the splitter blades on the performance and the unsteady internal flow condition are investigated. | T. Shigemitsu J. Fukutomi K. Kaji T. Wada | 2013 | Journal of Thermal Science2013，22，1： | 18 |
| 2 | Performance Analysis of Mini Centrifugal Pump with Splitter Blades显示文摘Design method for a mini centrifugal pump is not established because the internal flow condition for these small-sized fluid machines is not clarified and conventional theory is not suitable for small-sized pumps. Then, a semi-open impeller for the mini centrifugal pump with 55mm impeller diameter is adopted in this research to take simplicity and maintenance into consideration. Splitter blades are adopted in this research to improve the performance and internal flow condition of mini centrifugal pump having large blade outlet angle. The performance tests are conducted with these rotors in order to investigate the effect of the splitter blades on the performance and internal flow condition of the mini centrifugal pump. A three dimensional steady numerical flow analysis is conducted to analyze rotor, volute efficiency and loss caused by a vortex. It is clarified from the experimental results that the performance of the mini centrifugal pump is improved by the effect of the splitter blades. Flow condition at outlet of the rotor becomes uniform and back flow regions are suppressed in the case with the splitter blades.Further, the volute efficiency increases and the vortex loss decreases. In the present paper, the performance of the mini centrifugal pump is shown and the flow condition is clarified with the results of the experiment and the numerical flow analysis. Furthermore, the performance analyses of the mini centrifugal pumps with and without the splitter blades are conducted. | T. Shigemitsu J. Fukutomi T. Wada H. Shinohara | 2013 | Journal of Thermal Science2013，22，6： | 13 |
| 3 | Study on an Undershot Cross-Flow Water Turbine显示文摘This study aims to develop a water turbine suitable for ultra-low heads in open channels, with the end goal being the effective utilization of unutilized hydroelectric energy in agricultural water channels. We performed tests by applying a cross-flow runner to an open channel as an undershot water turbine while attempting to simplify the structure and eliminate the casing. We experimentally investigated the flow fields and performance of water turbines in states where the flow rate was constant for the undershot cross-flow water turbine mentioned above. In addition, we compared existing undershot water turbines with our undershot cross-flow water turbine after attaching a bottom plate to the runner. From the results, we were able to clarify the following. Although the effective head for cross-flow runners with no bottom plate was lower than those found in existing runners equipped with a bottom plate, the power output is greater in the high rotational speed range because of the high turbine efficiency. Also, the runner with no bottom plate differed from runners that had a bottom plate in that no water was being wound up by the blades or retained between the blades, and the former received twice the flow due to the flow-through effect. As a result, the turbine efficiency was greater for runners with no bottom plate in the full rotational speed range compared with that found in runners that had a bottom plate. | Yasuyuki Nishi Terumi Inagaki Yanrong Li Ryota Omiya Junichiro Fukutomi | 2014 | Journal of Thermal Science2014，23，3： | 2 |
| 4 | Performance and Internal Flow of Cross-Flow Fan with Inlet Guide Vane 显示文摘 | junichiro Fukutomi Rei Nakamura | 2005 | JSME International Journal2005，48，4： | 1 |
| 5 | Effects of carvedibl on plasma B - type natriuxetic peptide concentration and symptoms in patients with heart failure and preserved ejection fraction显示文摘 | Takeda Y Fukutomi T Suzuki S | 2004 | Am J Cardiol2004，94，： | 1 |
| 6 | Effects of carvedilol on plasma B-type natriuretic peptide concentration and symptoms in patients with heart failure and preserved ejection fraction显示文摘 | Takeda Y Fukutomi T Suzuki S | 2004 | Am J Cardiol2004，94，： | 1 |
| 7 | The seasons of a CEO's tenure显示文摘 | Hambrick D C Fukutomi G D | 1991 | Academy of Management Review1991，16，4： | 1 |
| 8 | Obesity and aspirin intol-erance are risk factors for difficult-to-treat asthma in Japanesenon-atopic women显示文摘 | Fukutomi Y Taniguchi M Tsuburai T | 2012 | Clin Exp Allergy2012，42，5： | 1 |
| 9 | Magnetic resonance imaging of benign phyllodes tumors of the breast显示文摘 | Kinoshita T Fukutomi T Kubochi K | 2004 | Breast J2004，10，： | 1 |
| 10 | JASPAC 01: Ran- domized phase III trial of adjuvant chemotherapy with gemcitabine versus S-1 for patients with resected pancre- atic cancer: Japan Adjuvant Study Group of Pancreatic Cancer (JASPAC-01)显示文摘 | Maeda A Boku N Fukutomi A | 2013 | Jpn J Clin Oncol2013，38，3： | 1 |
| 11 | Simulation-based medical education in clinical skills laboratory显示文摘 | Akaike M Fukutomi M Nagamune M | 2012 | J Med Invest2012，59，12： | 1 |
| 12 | Simulation-based medical edu- cation in clinical skills laboratory显示文摘 | Akaike M Fukutomi M Nagamune M | 2012 | J Med Invest2012，59，12： | 1 |
| 13 | Allergenieity and cross-reactivity of booklice (Liposcelis bostrichophila) : a com- mon household insect pest in Japan 显示文摘 | Fukutomi Y Kawakami Y Taniguchi M | 2012 | Int Arch Allergy Imm2012，157，4： | 1 |
| 14 | Microstuccture evolution and texture development during high-temperature uniaxial compression of magnesium alloy AZ31显示文摘 | HELES L OKAYASU K FUKUTOMI H | 2006 | Mater Sci Eng A2006，430，12： | 1 |
| 15 | The Seasons of a CEO's Tenure 显示文摘 | HAMBRICK D C FUKUTOMI G D S | 1991 | Academy of Management Review1991，16，4： | 1 |
| 16 | Kinetics and mechanism of ozone decompositionin basic aqueous solution显示文摘 | TOMIYASU H FUKUTOMI H GORDON G | | 0，，19： | 1 |
| 17 | Performance and internal flow of cross-flow fan with inlet guide vane显示文摘 | Fukutomi J Nakamura R | 2005 | JSME International Journal Series B-fluids and Thermal Engineering2005，48，4： | 1 |
| 18 | 显示文摘 | Fukutomi H Iguchi E | 2007 | Acta Materialia2007，55，： | 1 |
| 19 | Kinetics and mechanism ofozone decomposition in basic aqueous solution显示文摘 | Tomijas H Fukutomi H Gordon G | 1985 | Inony Chem1985，，24： | 1 |
| 20 | Design method for single-blade centrifugal pump impeller显示文摘 | Nishi Y Fujiwara R Fukutomi J | 2009 | Journal of Fluid Science and Technology2009，4，3： | 1 |
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