Sheffield, South Yorkshire, United Kingdom

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    ABSTRACT: In this paper, a combined method of schlieren and digital colour image processing is developed to study the effect of ignition location on the propagation of propane diffusion flames. The early weak blue flame is visualised through selective digital imaging enhancement techniques, which have revealed that a typical orange diffusion flame is often formed inside a blue flame pocket at the beginning of the ignition when ignited at the centreline of the fuel jet. When the ignition location towards the out edge of the fuel/air mixing boundary, the orange flame shifted and gradually broke the blue flame pocket. In the meantime, the flame was observed to propagate faster. The ratio of orange flame areas rose and the blue flame area fell accordingly.
    Energy Procedia 12/2015; 66:241-244. DOI:10.1016/j.egypro.2015.02.040
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    ABSTRACT: Experience has shown that higher shutter speed or framing rate may cause signal drop out and the loss of the weak flame emission. On the other hand, slow shutter speed or frame rate will not be able to resolve the higher flame oscillation frequency. In this study, two synchronised high speed cameras are used to investigate the effect of camera shutter speed and frame rates on the colour imaging quality and oscillation frequency of a premixed methane flame. Through an innovative digital imaging enhancement technique, the weak blue flame colour pixels can be selectively enhanced for better visualisation and analysis. As a result, the same flame imaged at different shutter speed can be compared and contrasted with good accuracy. Test cases are carried out to provide better understanding of flame structure and dynamics.
    Energy Procedia 12/2015; 66:237-240. DOI:10.1016/j.egypro.2015.02.039
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    ABSTRACT: Abstract Maintenance of a disinfectant residual within water distribution systems is the final barrier in protecting public health. Hydraulic modelling software can simulate the decay of residual but application is limited by reaction and network uncertainties. The state of the art of application of disinfectant modelling is presented here in terms of reaction rate formulations and coefficients, with observations on best practice for operational simulations. Modelling disinfection behaviour assuming idealised bulk reactions, informed by site-specific point of entry tests after any blending and including temperature correction, can provide valuable insight.
    Procedia Engineering 12/2015; 119(1):434 - 441. DOI:10.1016/j.proeng.2015.08.906


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    Western Bank, S10 2TN, Sheffield, South Yorkshire, United Kingdom
  • Head of Institution
    Sir Peter Middleton
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    0114 222 2000
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Top publications last week by reads

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International Journal of Science and Research (IJSR) 09/2014; 3(9):1863.
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