The Experts below are selected from a list of 32508 Experts worldwide ranked by ideXlab platform

Thomas Scanlon - One of the best experts on this subject based on the ideXlab platform.

Gemma Ramsey - One of the best experts on this subject based on the ideXlab platform.

  • a Computational Fluid Dynamic analysis of the effect of weld nozzle geometry changes on shielding gas coverage during gas metal arc welding
    Journal of Manufacturing Science and Engineering-transactions of The Asme, 2013
    Co-Authors: Stuart Campbell, Gemma Ramsey, Alexander Galloway, Norman Mcpherson
    Abstract:

    Three geometry changes to the inner bore of a welding nozzle and their effects on weld quality during gas metal arc welding (GMAW) were investigated through the use of Computational Fluid Dynamic (CFD) models and experimental trials. It was shown that an increased shielding gas exit velocity increased the gas column’s stability and therefore its resistance to side draughts. Double helix geometry within the nozzle reduced the gas column’s stability by generating a fast moving wall of gas around a slow moving centre. A pierced internal plate initially increased the gas velocity, however, the nozzle was unable to maintain the velocity and the change produced gas columns of similar stability to a standard nozzle. A pierced end plate produced the best results, increasing the shielding gases exit velocity sufficiently to marginally outperform the standard 16 mm welding nozzle.

  • A Computational Fluid Dynamic analysis of the effect of side draughts and nozzle diameter on shielding gas coverage during gas metal arc welding
    Journal of Materials Processing Technology, 2012
    Co-Authors: Gemma Ramsey, Norman Mcpherson, Stuart Campbell, Alexander Galloway, Thomas Scanlon
    Abstract:

    Extensive experimental trials were conducted, emulating the conditions modelled, in order to validate the Computational Fluid Dynamic results. Final results demonstrated that a more constricted nozzle was more effective at creating a stable gas column when subjected to side draughts. Higher shielding gas flow rates further reduce the gas column's vulnerability to side draughts and thus create a more stable coverage. The results have highlighted potential economic benefits for draught free environments, in which, the shielding gas flow rate can effectively be reduced.

Norman Mcpherson - One of the best experts on this subject based on the ideXlab platform.

  • a Computational Fluid Dynamic analysis of the effect of weld nozzle geometry changes on shielding gas coverage during gas metal arc welding
    Journal of Manufacturing Science and Engineering-transactions of The Asme, 2013
    Co-Authors: Stuart Campbell, Gemma Ramsey, Alexander Galloway, Norman Mcpherson
    Abstract:

    Three geometry changes to the inner bore of a welding nozzle and their effects on weld quality during gas metal arc welding (GMAW) were investigated through the use of Computational Fluid Dynamic (CFD) models and experimental trials. It was shown that an increased shielding gas exit velocity increased the gas column’s stability and therefore its resistance to side draughts. Double helix geometry within the nozzle reduced the gas column’s stability by generating a fast moving wall of gas around a slow moving centre. A pierced internal plate initially increased the gas velocity, however, the nozzle was unable to maintain the velocity and the change produced gas columns of similar stability to a standard nozzle. A pierced end plate produced the best results, increasing the shielding gases exit velocity sufficiently to marginally outperform the standard 16 mm welding nozzle.

  • A Computational Fluid Dynamic analysis of the effect of side draughts and nozzle diameter on shielding gas coverage during gas metal arc welding
    Journal of Materials Processing Technology, 2012
    Co-Authors: Gemma Ramsey, Norman Mcpherson, Stuart Campbell, Alexander Galloway, Thomas Scanlon
    Abstract:

    Extensive experimental trials were conducted, emulating the conditions modelled, in order to validate the Computational Fluid Dynamic results. Final results demonstrated that a more constricted nozzle was more effective at creating a stable gas column when subjected to side draughts. Higher shielding gas flow rates further reduce the gas column's vulnerability to side draughts and thus create a more stable coverage. The results have highlighted potential economic benefits for draught free environments, in which, the shielding gas flow rate can effectively be reduced.

Stuart Campbell - One of the best experts on this subject based on the ideXlab platform.

  • a Computational Fluid Dynamic analysis of the effect of weld nozzle geometry changes on shielding gas coverage during gas metal arc welding
    Journal of Manufacturing Science and Engineering-transactions of The Asme, 2013
    Co-Authors: Stuart Campbell, Gemma Ramsey, Alexander Galloway, Norman Mcpherson
    Abstract:

    Three geometry changes to the inner bore of a welding nozzle and their effects on weld quality during gas metal arc welding (GMAW) were investigated through the use of Computational Fluid Dynamic (CFD) models and experimental trials. It was shown that an increased shielding gas exit velocity increased the gas column’s stability and therefore its resistance to side draughts. Double helix geometry within the nozzle reduced the gas column’s stability by generating a fast moving wall of gas around a slow moving centre. A pierced internal plate initially increased the gas velocity, however, the nozzle was unable to maintain the velocity and the change produced gas columns of similar stability to a standard nozzle. A pierced end plate produced the best results, increasing the shielding gases exit velocity sufficiently to marginally outperform the standard 16 mm welding nozzle.

  • A Computational Fluid Dynamic analysis of the effect of side draughts and nozzle diameter on shielding gas coverage during gas metal arc welding
    Journal of Materials Processing Technology, 2012
    Co-Authors: Gemma Ramsey, Norman Mcpherson, Stuart Campbell, Alexander Galloway, Thomas Scanlon
    Abstract:

    Extensive experimental trials were conducted, emulating the conditions modelled, in order to validate the Computational Fluid Dynamic results. Final results demonstrated that a more constricted nozzle was more effective at creating a stable gas column when subjected to side draughts. Higher shielding gas flow rates further reduce the gas column's vulnerability to side draughts and thus create a more stable coverage. The results have highlighted potential economic benefits for draught free environments, in which, the shielding gas flow rate can effectively be reduced.

Alexander Galloway - One of the best experts on this subject based on the ideXlab platform.

  • a Computational Fluid Dynamic analysis of the effect of weld nozzle geometry changes on shielding gas coverage during gas metal arc welding
    Journal of Manufacturing Science and Engineering-transactions of The Asme, 2013
    Co-Authors: Stuart Campbell, Gemma Ramsey, Alexander Galloway, Norman Mcpherson
    Abstract:

    Three geometry changes to the inner bore of a welding nozzle and their effects on weld quality during gas metal arc welding (GMAW) were investigated through the use of Computational Fluid Dynamic (CFD) models and experimental trials. It was shown that an increased shielding gas exit velocity increased the gas column’s stability and therefore its resistance to side draughts. Double helix geometry within the nozzle reduced the gas column’s stability by generating a fast moving wall of gas around a slow moving centre. A pierced internal plate initially increased the gas velocity, however, the nozzle was unable to maintain the velocity and the change produced gas columns of similar stability to a standard nozzle. A pierced end plate produced the best results, increasing the shielding gases exit velocity sufficiently to marginally outperform the standard 16 mm welding nozzle.

  • A Computational Fluid Dynamic analysis of the effect of side draughts and nozzle diameter on shielding gas coverage during gas metal arc welding
    Journal of Materials Processing Technology, 2012
    Co-Authors: Gemma Ramsey, Norman Mcpherson, Stuart Campbell, Alexander Galloway, Thomas Scanlon
    Abstract:

    Extensive experimental trials were conducted, emulating the conditions modelled, in order to validate the Computational Fluid Dynamic results. Final results demonstrated that a more constricted nozzle was more effective at creating a stable gas column when subjected to side draughts. Higher shielding gas flow rates further reduce the gas column's vulnerability to side draughts and thus create a more stable coverage. The results have highlighted potential economic benefits for draught free environments, in which, the shielding gas flow rate can effectively be reduced.