Faculty Profiles - SHIMIZU Fumio

Papers - SHIMIZU Fumio

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Generation Mechanism of Flow Force Acting on Spool Valve Reviewed International journal

SHIMIZU Fumio, TANAKA Kazuhiro

JFPS International Journal of Fluid Power System ( The Japan Fluid Power System Society ) 15 ( 2 ) 71 - 77 2022.01

Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (scientific journal)

In hydraulic systems, spool valves play an important role. When the spool moves to the left or right, the flow path in the control valve changes, and the flow rate of hydraulic oil is controlled by the valve opening. Since high-pressure fluid flows into the valve, it is necessary to predict the behavior of the spool with high accuracy. One of the problems that spool valves have the hydraulic vibration caused by the high-pressure fluid. There is a need for a control valve that can suppress the hydraulic vibration even if it is used stand-alone. The purpose of this study is to visualize the flow field in the spool valve using three-dimensional computational analysis, and to clarify the generation mechanism of the flow force acting on the spool. The flow force acting on the spool was caused by the pressure difference between the high-pressure region generated by the impact of the jet and the low-pressure region through which the high-speed jet passed. Fluctuation of the jet flow occurred when the valve opening became narrow. The unsteady fluctuation of the jet flow had a significant effect on the unsteady variation of the flow forces.

DOI： 10.5739/jfpsij.15.71

CiNii Research

Simulation of Fuel Pulsation and Its Reduction During Mode Switching of a Double-Gear Fuel Pump for Turbofan Engine

Masuda Seiei, Shimizu Fumio, Fuchiwaki Masaki, Tanaka Kazuhiro

nternational Gas Turbine Congress 2023 Kyoto Paper ThPM11.2 2023.11

Flow Patterns and Hysteresis Characteristic of a Poppet Valve Reviewed International journal

HIROSE Naoki, MASUDA Seiei, SHIMIZU Fumio, FUCHIWAKI Masaki, TANAKA Kazuhiro

JFPS International Journal of Fluid Power System ( The Japan Fluid Power System Society ) 15 ( 2 ) 53 - 61 2022.01

Language：English Publishing type：Research paper (scientific journal)

Previous studies on poppet valves have revealed that there are various flow patterns in the flow field around the valve body and that the flow pattern inside the poppet valve has various effects on the poppet valve. Recently, Masuda et al. have reproduced the hysteresis phenomenon on the pressure and flowrate characteristics of a poppet valve by CFD analysis coupled with an equation of motion. Unfortunately, their paper does not describe the detailed relationship between the hysteresis characteristics and the flow pattern. In this study, by succeeding and developing the work of Masuda et al. and including the results of previous studies, we have systematically organized the flow patterns of poppet valves into five types and clarified the relationship between the hysteresis characteristics and flow patterns. In addition, the flow force acting on the poppet valve connecting the hysteresis characteristic and the flow pattern has also been clarified.

DOI： 10.5739/jfpsij.15.53

CiNii Research

Generation Mechanism of Flow Force Acting on Spool Valve Reviewed International journal

Fumio SHIMIZU, Kazuhiro TANAKA

Proceedings of The 11th JFPS International Symposium on Fluid Power 2020 ( The Japan Fluid Power System Society ) GS5-2-02, pp.6 2021.10

Internal Flow and Hysteresis Characteristic of the Poppet Type Pressure Control Valve Reviewed International journal

Seiei MASUDA, Fumio SHIMIZU, Masaki FUCHIWAKI, Kazuhiro TANAKA

Proceedings of The 11th JFPS International Symposium on Fluid Power 2020 ( The Japan Fluid Power System Society ) OS3-03, pp.10 2021.10

Flow Patterns and Hysteresis Characteristic of a Poppet Valve Reviewed International journal

Naoki HIROSE, Seiei MASUDA, Fumio SHIMIZU, Masaki FUCHIWAKI, Kazuhiro TANAKA

Proceedings of The 11th JFPS International Symposium on Fluid Power 2020 ( The Japan Fluid Power System Society ) OS3-04, pp.11 2021.10

Derivation of lumped parameter system model of a flow passage simultaneously modeling resistance and inertia and verification in basic flow passage Reviewed

HIGO Hiroshi, SHIMIZU Fumio, TANAKA Kazuhiro

TRANSACTIONS OF THE JAPAN FLUID POWER SYSTEM SOCIETY ( The Japan Fluid Power System Society ) 52 ( 1 ) 16 - 24 2021.04

Language：Japanese Publishing type：Research paper (scientific journal)

A laminar flow resistance in a pipe is usually used as a representative model of flow resistance because it is convenient to use and often gives reasonable resistance value in a small size pipe under steady state condition. However, the laminar flow resistance model in a pipe is not applicable in an oil flow passage of a real circuit because a flow passage has complex shape in a real circuit. Furthermore, the mathematical model of fluid column in a pipe made in inviscid flow condition is often used as an inertial model in considering dynamic condition. In the real condition of operating oil-hydraulic circuit, the above mentioned two effects, a complex shape of flow passage and flow dynamic characteristics, appears in viscous flow condition. A new model or modeling method to include and solve these effects reasonably becomes necessary. A new modeling method using CFD is introduced in this paper.

DOI： 10.5739/jfps.52.16

CiNii Article

CiNii Research

Other Link： https://www.jstage.jst.go.jp/article/jfps/52/1/52_16/_pdf

Internal Flow and Hysteresis Characteristic of the Poppet Type Pressure Control Valve Reviewed

MASUDA Seiei, SHIMIZU Fumio, FUCHIWAKI Masaki, TANAKA Kazuhiro

TRANSACTIONS OF THE JAPAN FLUID POWER SYSTEM SOCIETY ( The Japan Fluid Power System Society ) 52 ( 1 ) 8 - 15 2021.04

Language：Japanese Publishing type：Research paper (scientific journal)

Poppet valves are often used as a pressure / flow rate control valve for a hydraulic system. Much research has been conducted on the characteristics of poppet valves. Hysteresis characteristics have emerged in pressure-flow characteristic experiments of poppet valves designed and prototyped by the author. In order to clarify the mechanism of this hysteresis characteristic, we firconfirmed the reproduction of hysteresis and confirmed the validity of the research policy. Specifically, we investigated the internal flow by CFD analysis and examined the reproduction of hysteresis characteristics by CFD. The CFD software used is Simerics MP +, which allows CFD analysis to be combined with the valve's equation of motion. First, the precision of CFD analysis was verified by confirming that the experimental values of in the reference and calculated values were in good agreement. Furthermore, CFD steady flow analysis of the internal flow was performed, and the validity of the calculation results such as the flow patterns, flow coefficient, and flow force was examined. As a result, it was clarified that there is a flow pattern that can be roughly divided into two types of internal flow with different flow rates. Then, by changing the flow rate in a time-dependent manner using CFD, we were able to reproduce the hysteresis characteristics that are in good agreement with the experimental results.

DOI： 10.5739/jfps.52.8

CiNii Article

CiNii Research

Other Link： https://www.jstage.jst.go.jp/article/jfps/52/1/52_8/_pdf

Modelling and reducing fuel flow pulsation of a fuel-metering system by improving response of the pressure control valve during pump mode switching in a turbofan engine Reviewed International journal

Masuda S., Shimizu F., Fuchiwaki M., Tanaka K.

ASME/BATH 2019 Symposium on Fluid Power and Motion Control, FPMC 2019 FPMC2019-1604 2020.01

Deciding the System Dynamic Parameters in a Complex Flow Passage through CFD Reviewed International journal

Hiroshi HIGO, Tomoyuki NAKAMURA, Takeshi YAMAGUCHI, Fumio SHIMIZU, Kazuhiro TANAKA

JFPS International Journal of Fluid Power System ( The Japan Fluid Power System Society ) 11 ( 3 ) 87 - 96 10 2019.05

Language：English Publishing type：Research paper (scientific journal)

Laminar flow resistance in a straight pipe is generally used as a representative model for flow resistance because it is convenient to use and often yields reasonable resistance values in a straight pipe under steady state condition. However, the laminar flow resistance model in a straight pipe is not applicable to oil flow passage in a real circuit owing to the complex shape of the flow passage in a real circuit. Furthermore, a mathematical model of the fluid column in a pipe under in an inviscid flow condition is often used as an inertial model while considering dynamic conditions. Under actual operating conditions of an oil-hydraulic circuit, the two abovementioned effects, complex flow passage shape and flow dynamic characteristics, appear in viscous flow condition. Therefore, it is necessary to develop a new model or modeling method for solving these effects reasonably. This study aims to introduce a new modeling method based on the computational fluid dynamics (CFD) theory.

DOI： 10.5739/jfpsij.11.87

CiNii Article

CiNii Research

Other Link： https://confit.atlas.jp/guide/event/jfps2017/top?lang=en

Flow characteristics of water delivery piping system and its effective flow area at discharge branches Reviewed

Shimizu F., Akinaga M., Matsuyoshi Y., Tanaka K.

IOP Conference Series: Earth and Environmental Science 240 ( 6 ) IAHR2018-261 (pp. 9) 2019.03

Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Japan Kyoto 2018.09.16 - 2018.09.21

DOI： 10.1088/1755-1315/240/6/062034

Scopus

Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85063971821&origin=inward

Modelling and reducing fuel flow pulsation of a fuel-metering system during pump mode switching in a turbofan engine Reviewed International journal

Masuda S., Shimizu F., Fuchiwaki M., Tanaka K.

IOP Conference Series: Earth and Environmental Science 240 ( 5 ) IAHR2018-223 (pp. 10) 2019.03

Modelling and Reducing Fuel Flow Pulsation of a Fuel-Metering System with a Double Gear Pump During Pump Mode Switching in a Turbo Fan Engine Reviewed

Seiei MASUDA, Kazuhiro TANAKA, Masaki FUCHIWAKI, Fumio SHIMIZU

Proceedings of Bath/ASME Symposium on Fluid Power and Motion Control 10, FPMC2018 2018.09

Flow force acting on spool valve

Fumio SHIMIZU, Kazuhiro TANAKA

Hydraulics & Pneumatics 57 ( 9 ) 37 - 41 2018.09

Decision of System Dynamics Parameters in Complex Flow Passage through CFD Reviewed

Hiroshi HIGO, Tomoyuki NAKAMURA, Takeshi YAMAGUCHI, Kazuhiro TANAKA, Fumio SHIMIZU

Proceedings of 10th JFPS International Symposium on Fluid Power FUKUOKA 2017 8 2017.10

Computational Analysis of Solenoid Spool Valve Considered of Leakage Flow Reviewed

Fumio SHIMIZU, Takahiro TSUKAZAKI, Takayuki HORI, Kazuhiro TANAKA, Tomohiro YASUDA, Masahito WATANABE

Proceedings of 10th JFPS International Symposium on Fluid Power FUKUOKA 2017 7 2017.10

CFD Fundamentals in Oil Flow Simulation

Kazuhiro TANAKA, Fumio SHIMIZU

Hydraulics & Pneumatics 56 ( 5 ) 11 - 17 2017.05

Computational Method and Example for Acoustic Field

Fumio SHIMIZU, Kazuhiro TANAKA

Hydraulics & Pneumatics ( Japan Industrial Publishing Co., LTD. ) 54 ( 4 ) 45 - 48 2015.04

Acoustic/Structure Coupled Analysis around Sound Insulation Cover with a Small Hole Reviewed

Fumio SHIMIZU, Junichiro TAMOA, Kazuhiro TANAKA

International Workshop on Environment & Engineering 2014 (IWEE2014) No. 106 (pp. 4) 2014.11

Numerical Analysis of Acoustic Field around Sound Insulation Cover Using Acoustic/Structure Coupled Technique Reviewed

Fumio SHIMIZU, Koji YAMAMOTO, Hiroshi SHIGEFUI, Kazuhiro TANAKA

Proceedings of the 9th JFPS International Symposium on Fluid Power (JFPS2014Matsue) 599 - 606 2014.10

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