start-ver=1.4
cd-journal=joma
no-vol=
cd-vols=
no-issue=
article-no=
start-page=
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2019
dt-pub=20191226
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=CO2 concentration measurements inside expansion-compression engine under high EGR conditions using an infrared absorption method
en-subtitle=
kn-subtitle=
en-abstract=The purpose of this study is to measure the high concentrations of CO2 near a spark plug inside an internal combustion engine, and an infrared absorption method is used for the measurement. The spark...
kn-abstract=The purpose of this study is to measure the high concentrations of CO2 near a spark plug inside an internal combustion engine, and an infrared absorption method is used for the measurement. The spark plug sensor was adapted to a compression-expansion machine, and the CO2 concentration near the spark plug was measured by adding a gas mixture, including CO2 to imitate EGR. Next, the EGR ratio was changed from 10 to 40%, and the CO2 concentration was measured. The effect of the CO2 on the flame propagation was investigated by visualizing the bottom view of the compression-expansion machine. The measurements of CO2 mass concentration are in agreement with those predicted by direct-absorption spectroscopy fundamental theory from the crank angle −60 to −15 deg ATDC. The error was less than 20%, and under the conditions with an EGR ratio of 20–40%.
en-copyright=
kn-copyright=

en-aut-name=AhmedFatma B.M.
en-aut-sei=Ahmed
en-aut-mei=Fatma B.M.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=EsmailMohamed F.C.
en-aut-sei=Esmail
en-aut-mei=Mohamed F.C.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=KawaharaNobuyuki
en-aut-sei=Kawahara
en-aut-mei=Nobuyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=TomitaEiji
en-aut-sei=Tomita
en-aut-mei=Eiji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

affil-num=1
en-affil=Department of Physics, Faculty of Science, Aswan University
kn-affil=

affil-num=2
en-affil=Department Mechanical Power Engineering, Faculty of Energy Engineering, Aswan University
kn-affil=

affil-num=3
en-affil=Department of Mechanical Engineering, Okayama University
kn-affil=

affil-num=4
en-affil=Department of Mechanical Engineering, Okayama University
kn-affil=
en-keyword=Infrared absorption method
kn-keyword=Infrared absorption method
en-keyword=CO2
kn-keyword=CO2
en-keyword=HITRAN
kn-keyword=HITRAN
en-keyword=EGR
kn-keyword=EGR
en-keyword=Visualization
kn-keyword=Visualization
en-keyword=Spark plug sensor
kn-keyword=Spark plug sensor
END

start-ver=1.4
cd-journal=joma
no-vol=25
cd-vols=
no-issue=2
article-no=
start-page=39
end-page=54
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1991
dt-pub=19910328
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Prediction of Transient and Steady Turbulent Free Subsonic Air Jets
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Velocity distributions and related parameters of　transient and steady, turbulent air jets issuing under atmospheric conditions at Mach 0.14, 0.33 and 0.5 have been predicted using Navier-Stokes(N-S) equations for compressible flow and incompressible flow independently with the k-ε model. The closeness and consistence of the results predicted by the N-S equations for compressible and incompressible flows as well as with relevant measurement or similar prediction show that the incompressible flow assumption for at least some subsonic gas jets issuing at velocities higher than Mach 0.3, the general limit for incompressible fluid flow, can be reasonably accurate particularly in the main fully developed flow region. This suggests that the divergence term in source terms of the momentum, turbulence energy and its dissipation rate equations have negligible effects for some seemingly compressible high speed, subsonic free gas jets. The computation time is reduced by at least 18 % when incompressible flow assumption is used.
en-copyright=
kn-copyright=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=NsungeFelix Chintu
kn-aut-sei=Nsunge
kn-aut-mei=Felix Chintu
aut-affil-num=1
ORCID=

en-aut-name=TomitaEiji
en-aut-sei=Tomita
en-aut-mei=Eiji
kn-aut-name=冨田栄二
kn-aut-sei=冨田
kn-aut-mei=栄二
aut-affil-num=2
ORCID=

en-aut-name=HamamotoYoshisuke
en-aut-sei=Hamamoto
en-aut-mei=Yoshisuke
kn-aut-name=浜本嘉輔
kn-aut-sei=浜本
kn-aut-mei=嘉輔
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=Graduate School of Natural Science and Technology

affil-num=2
en-affil=
kn-affil=Dept. of Mechanical Engineering

affil-num=3
en-affil=
kn-affil=Dept. of Mechanical Engineering
END

start-ver=1.4
cd-journal=joma
no-vol=25
cd-vols=
no-issue=2
article-no=
start-page=25
end-page=38
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1991
dt-pub=19910328
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Numerical Calculation of a Transient Methane Gas Jet Discharging into Quiescent Atmosphere at Mach One
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=A suddenly started cold methane gas jet issuing from a 1 mm diameter orifice into still air at Mach one has been predicted using the two-equation, high Reynolds number version of k-ε turbulence model and SIMPLE algorithm which employs so called primitive variables and a hybrid scheme for treating combined diffusion and convection. Global trends of predicted radial distributions of velocity, temperature, methane concentration in the steady rear part of the transient jet and axial jet tip penetration compare reasonably well with universal profiles representing measurement for the steady jet particularly in the fully developed turbulent core and semi-empirical relation for the transient jet respectively. The prediction scheme has shown reasonably good accuracy especially in prediction of main flow parameters of a transient, high speed compressible gas jet issuing into a dissimilar surrounding gas(binary gas mixture jet).
en-copyright=
kn-copyright=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=NsungeFelix Chintu
kn-aut-sei=Nsunge
kn-aut-mei=Felix Chintu
aut-affil-num=1
ORCID=

en-aut-name=TomiｔaEiji
en-aut-sei=Tomiｔa
en-aut-mei=Eiji
kn-aut-name=冨田栄二
kn-aut-sei=冨田
kn-aut-mei=栄二
aut-affil-num=2
ORCID=

en-aut-name=HamamotoYoshisuke
en-aut-sei=Hamamoto
en-aut-mei=Yoshisuke
kn-aut-name=浜本嘉輔
kn-aut-sei=浜本
kn-aut-mei=嘉輔
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=Graduate School of Natural Science and Technology

affil-num=2
en-affil=
kn-affil=Dept. of Mechanical Engineering

affil-num=3
en-affil=
kn-affil=Dept. of Mechanical Engineering
END

start-ver=1.4
cd-journal=joma
no-vol=26
cd-vols=
no-issue=1
article-no=
start-page=27
end-page=41
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1991
dt-pub=19911130
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Experimental and Theoretical Study on a Transient, Turbulent Free Hydrogen Gas Jet Issuing into Still Air
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Distributions of hydrogen gas concentration in a suddenly started, single shot hydrogen gas jet issuing from a 1 mm diameter injector into still air were measured using laser interferometry method. This unsteady, turbulent free jet flow has also been calculated using the two-equation, high Reynolds number version of k-ε turbulence model and hybrid scheme for treating combined diffusion and convection in the SIMPLE algorithm. The injection pressure was 0.5 MPa for which predicted and measured temporal jet tip penetration distributions indicate that the jet discharged into still air at Mach 0.25. The level of agreement between present prediction and measurement is good in some regions and poor in others.
en-copyright=
kn-copyright=

en-aut-name=TomitaEiji
en-aut-sei=Tomita
en-aut-mei=Eiji
kn-aut-name=冨田栄二
kn-aut-sei=冨田
kn-aut-mei=栄二
aut-affil-num=1
ORCID=

en-aut-name=
en-aut-sei=
en-aut-mei=
kn-aut-name=NsungeFelix Chintu
kn-aut-sei=Nsunge
kn-aut-mei=Felix Chintu
aut-affil-num=2
ORCID=

en-aut-name=HamamotoYoshisuke
en-aut-sei=Hamamoto
en-aut-mei=Yoshisuke
kn-aut-name=浜本嘉輔
kn-aut-sei=浜本
kn-aut-mei=嘉輔
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=Dept. of Mechanical Engineering

affil-num=2
en-affil=
kn-affil=Graduate School of Natural Science and TechnologyEngineering

affil-num=3
en-affil=
kn-affil=Dept. of Mechanical Engineering
END