The Experts below are selected from a list of 33219 Experts worldwide ranked by ideXlab platform

Jin-yuan Qian - One of the best experts on this subject based on the ideXlab platform.

  • parametric analysis on throttling components of multi stage high pressure reducing valve
    Applied Thermal Engineering, 2018
    Co-Authors: Fu-qiang Chen, Jin-yuan Qian, Wei Kang Jiang
    Abstract:

    Abstract High pressure reducing valve (HPRV) is widely used for pressure and temperature control of heated steams in power plant and other related process engineering. The structures of throttling components inside HPRVs have important effects on the control performances. In this paper, a parametric study of throttling components in a multi-stage high pressure reducing valve (MSHPRV) is carried out, including the relative angle of inner and outer porous shrouded holes, the orifice plate thickness, the number of orifice plates and the diameter of plate holes. A numerical model is established to investigate internal flow and throttling characteristics with RNG k-e model, and it is validated by the theoretical Flux Calculation. The results show that, the relative angle set as 180° can obtain the largest decompression pressure when steam flows through porous shrouded valve core, while the turbulence degree is the lowest. Setting one orifice plate can decrease the turbulent dissipation rate. The plate thickness has less influence on throttling effects. For ensuring the outlet Flux, plate holes with smaller diameters should be chosen with a better flowing property on thermodynamic parameters. The work can be referred by the design work of throttling components in MSHPRV and it can also benefit the further research on similar HPRVs.

S Midorikawa - One of the best experts on this subject based on the ideXlab platform.

  • atmospheric neutrino Flux Calculation using the nrlmsise 00 atmospheric model
    Physical Review D, 2015
    Co-Authors: M Honda, T Kajita, K Kasahara, Sajjad M Athar, S Midorikawa
    Abstract:

    We extend our Calculation of the atmospheric neutrino Fluxes to polar and tropical regions. It is well known that the air density profiles in the polar and the tropical regions are different from the mid-latitude region. Also there are large seasonal variations in the polar region. In this extension, we use the NRLMSISE-00 global atmospheric model J. M. Picone, J. Geophys. Res. 107, SIA 15 (2002), replacing the U.S.-standard 1976 atmospheric model, which has no positional or seasonal variations. With the NRLMSISE-00 atmospheric model, we study the atmospheric neutrino Flux at the polar and tropical regions with seasonal variations. The geomagnetic model international geomagnetic reference field (IGRF) we have used in our Calculations seems accurate enough in the polar regions also. However, the polar and the equatorial regions are the two extremes in the IGRF model, and the magnetic field configurations are largely different from one another. Note that the equatorial region is also the tropical region generally. We study the effect of the geomagnetic field on the atmospheric neutrino Flux in these extreme regions.

  • improvement of low energy atmospheric neutrino Flux Calculation using the jam nuclear interaction model
    Physical Review D, 2011
    Co-Authors: M Honda, T Kajita, K Kasahara, S Midorikawa
    Abstract:

    We present the Calculation of the atmospheric neutrino Fluxes with an interaction model named JAM, which is used in PHITS (Particle and Heavy-Ion Transport code System) [K. Niita et al., Radiation Measurements 41, 1080 (2006).]. The JAM interaction model agrees with the HARP experiment [H. Collaboration, Astropart. Phys. 30, 124 (2008).] a little better than DPMJET-III [S. Roesler, R. Engel, and J. Ranft, arXiv:hep-ph/0012252.]. After some modifications, it reproduces the muon Flux below $1\text{ }\text{ }\mathrm{GeV}/c$ at balloon altitudes better than the modified DPMJET-III, which we used for the Calculation of atmospheric neutrino Flux in previous works [T. Sanuki, M. Honda, T. Kajita, K. Kasahara, and S. Midorikawa, Phys. Rev. D 75, 043005 (2007).][M. Honda, T. Kajita, K. Kasahara, S. Midorikawa, and T. Sanuki, Phys. Rev. D 75, 043006 (2007).]. Some improvements in the Calculation of atmospheric neutrino Flux are also reported.

M Honda - One of the best experts on this subject based on the ideXlab platform.

  • atmospheric neutrino Flux Calculation using the nrlmsise 00 atmospheric model
    Physical Review D, 2015
    Co-Authors: M Honda, T Kajita, K Kasahara, Sajjad M Athar, S Midorikawa
    Abstract:

    We extend our Calculation of the atmospheric neutrino Fluxes to polar and tropical regions. It is well known that the air density profiles in the polar and the tropical regions are different from the mid-latitude region. Also there are large seasonal variations in the polar region. In this extension, we use the NRLMSISE-00 global atmospheric model J. M. Picone, J. Geophys. Res. 107, SIA 15 (2002), replacing the U.S.-standard 1976 atmospheric model, which has no positional or seasonal variations. With the NRLMSISE-00 atmospheric model, we study the atmospheric neutrino Flux at the polar and tropical regions with seasonal variations. The geomagnetic model international geomagnetic reference field (IGRF) we have used in our Calculations seems accurate enough in the polar regions also. However, the polar and the equatorial regions are the two extremes in the IGRF model, and the magnetic field configurations are largely different from one another. Note that the equatorial region is also the tropical region generally. We study the effect of the geomagnetic field on the atmospheric neutrino Flux in these extreme regions.

  • improvement of low energy atmospheric neutrino Flux Calculation using the jam nuclear interaction model
    Physical Review D, 2011
    Co-Authors: M Honda, T Kajita, K Kasahara, S Midorikawa
    Abstract:

    We present the Calculation of the atmospheric neutrino Fluxes with an interaction model named JAM, which is used in PHITS (Particle and Heavy-Ion Transport code System) [K. Niita et al., Radiation Measurements 41, 1080 (2006).]. The JAM interaction model agrees with the HARP experiment [H. Collaboration, Astropart. Phys. 30, 124 (2008).] a little better than DPMJET-III [S. Roesler, R. Engel, and J. Ranft, arXiv:hep-ph/0012252.]. After some modifications, it reproduces the muon Flux below $1\text{ }\text{ }\mathrm{GeV}/c$ at balloon altitudes better than the modified DPMJET-III, which we used for the Calculation of atmospheric neutrino Flux in previous works [T. Sanuki, M. Honda, T. Kajita, K. Kasahara, and S. Midorikawa, Phys. Rev. D 75, 043005 (2007).][M. Honda, T. Kajita, K. Kasahara, S. Midorikawa, and T. Sanuki, Phys. Rev. D 75, 043006 (2007).]. Some improvements in the Calculation of atmospheric neutrino Flux are also reported.

  • improvement of low energy atmospheric neutrino Flux Calculation using the jam nuclear interaction model
    Physical Review D, 2011
    Co-Authors: M Honda, T Kajita, K Kasahara
    Abstract:

    We present the Calculation of the atmospheric neutrino Fluxes with an interaction model named JAM, which is used in PHITS (Particle and Heavy-Ion Transport code System) [K. Niita et al., Radiation Measurements 41, 1080 (2006).]. The JAM interaction model agrees with the HARP experiment [H. Collaboration, Astropart. Phys. 30, 124 (2008).] a little better than DPMJET-III[S. Roesler, R. Engel, and J. Ranft, arXiv:hep-ph/0012252.]. After some modifications, it reproduces the muon Flux below 1 GeV/c at balloon altitudes better than the modified DPMJET-III, which we used for the Calculation of atmospheric neutrino Flux in previous works [T. Sanuki, M. Honda, T. Kajita, K. Kasahara, and S. Midorikawa, Phys. Rev. D 75, 043005 (2007).][M. Honda, T. Kajita, K. Kasahara, S. Midorikawa, and T. Sanuki, Phys. Rev. D 75, 043006 (2007).]. Some improvements in the Calculation of atmospheric neutrino Flux are also reported.

Wei Kang Jiang - One of the best experts on this subject based on the ideXlab platform.

  • parametric analysis on throttling components of multi stage high pressure reducing valve
    Applied Thermal Engineering, 2018
    Co-Authors: Fu-qiang Chen, Jin-yuan Qian, Wei Kang Jiang
    Abstract:

    Abstract High pressure reducing valve (HPRV) is widely used for pressure and temperature control of heated steams in power plant and other related process engineering. The structures of throttling components inside HPRVs have important effects on the control performances. In this paper, a parametric study of throttling components in a multi-stage high pressure reducing valve (MSHPRV) is carried out, including the relative angle of inner and outer porous shrouded holes, the orifice plate thickness, the number of orifice plates and the diameter of plate holes. A numerical model is established to investigate internal flow and throttling characteristics with RNG k-e model, and it is validated by the theoretical Flux Calculation. The results show that, the relative angle set as 180° can obtain the largest decompression pressure when steam flows through porous shrouded valve core, while the turbulence degree is the lowest. Setting one orifice plate can decrease the turbulent dissipation rate. The plate thickness has less influence on throttling effects. For ensuring the outlet Flux, plate holes with smaller diameters should be chosen with a better flowing property on thermodynamic parameters. The work can be referred by the design work of throttling components in MSHPRV and it can also benefit the further research on similar HPRVs.

K Kasahara - One of the best experts on this subject based on the ideXlab platform.

  • atmospheric neutrino Flux Calculation using the nrlmsise 00 atmospheric model
    Physical Review D, 2015
    Co-Authors: M Honda, T Kajita, K Kasahara, Sajjad M Athar, S Midorikawa
    Abstract:

    We extend our Calculation of the atmospheric neutrino Fluxes to polar and tropical regions. It is well known that the air density profiles in the polar and the tropical regions are different from the mid-latitude region. Also there are large seasonal variations in the polar region. In this extension, we use the NRLMSISE-00 global atmospheric model J. M. Picone, J. Geophys. Res. 107, SIA 15 (2002), replacing the U.S.-standard 1976 atmospheric model, which has no positional or seasonal variations. With the NRLMSISE-00 atmospheric model, we study the atmospheric neutrino Flux at the polar and tropical regions with seasonal variations. The geomagnetic model international geomagnetic reference field (IGRF) we have used in our Calculations seems accurate enough in the polar regions also. However, the polar and the equatorial regions are the two extremes in the IGRF model, and the magnetic field configurations are largely different from one another. Note that the equatorial region is also the tropical region generally. We study the effect of the geomagnetic field on the atmospheric neutrino Flux in these extreme regions.

  • improvement of low energy atmospheric neutrino Flux Calculation using the jam nuclear interaction model
    Physical Review D, 2011
    Co-Authors: M Honda, T Kajita, K Kasahara, S Midorikawa
    Abstract:

    We present the Calculation of the atmospheric neutrino Fluxes with an interaction model named JAM, which is used in PHITS (Particle and Heavy-Ion Transport code System) [K. Niita et al., Radiation Measurements 41, 1080 (2006).]. The JAM interaction model agrees with the HARP experiment [H. Collaboration, Astropart. Phys. 30, 124 (2008).] a little better than DPMJET-III [S. Roesler, R. Engel, and J. Ranft, arXiv:hep-ph/0012252.]. After some modifications, it reproduces the muon Flux below $1\text{ }\text{ }\mathrm{GeV}/c$ at balloon altitudes better than the modified DPMJET-III, which we used for the Calculation of atmospheric neutrino Flux in previous works [T. Sanuki, M. Honda, T. Kajita, K. Kasahara, and S. Midorikawa, Phys. Rev. D 75, 043005 (2007).][M. Honda, T. Kajita, K. Kasahara, S. Midorikawa, and T. Sanuki, Phys. Rev. D 75, 043006 (2007).]. Some improvements in the Calculation of atmospheric neutrino Flux are also reported.

  • improvement of low energy atmospheric neutrino Flux Calculation using the jam nuclear interaction model
    Physical Review D, 2011
    Co-Authors: M Honda, T Kajita, K Kasahara
    Abstract:

    We present the Calculation of the atmospheric neutrino Fluxes with an interaction model named JAM, which is used in PHITS (Particle and Heavy-Ion Transport code System) [K. Niita et al., Radiation Measurements 41, 1080 (2006).]. The JAM interaction model agrees with the HARP experiment [H. Collaboration, Astropart. Phys. 30, 124 (2008).] a little better than DPMJET-III[S. Roesler, R. Engel, and J. Ranft, arXiv:hep-ph/0012252.]. After some modifications, it reproduces the muon Flux below 1 GeV/c at balloon altitudes better than the modified DPMJET-III, which we used for the Calculation of atmospheric neutrino Flux in previous works [T. Sanuki, M. Honda, T. Kajita, K. Kasahara, and S. Midorikawa, Phys. Rev. D 75, 043005 (2007).][M. Honda, T. Kajita, K. Kasahara, S. Midorikawa, and T. Sanuki, Phys. Rev. D 75, 043006 (2007).]. Some improvements in the Calculation of atmospheric neutrino Flux are also reported.