Journal: Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy

Abbreviation

Proc IMechE Part A: J Power and Energy

Publisher

SAGE

Journal Volumes

ISSN

0957-6509
2041-2967

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2005 - 200912010 - 20173
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Publications 1 - 4 of 4
  • A computational investigation of the effect of surface roughness on heat transfer on the stator endwall of an axial turbine
    Item type: Journal Article
    Lutum, Ewald; Cottier, Francois; Crawford, Michael E.; et al. (2015)
    Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy
  • Aerodynamic investigation of a rotating rib-roughened channel by time-resolved particle image velocimetry
    Item type: Journal Article
    Coletti, Filippo; Arts, Tony (2011)
    Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy
    Particle image velocimetry (PIV) is used to study the turbulent flow over the rib-roughened wall of a cooling channel model in rotation. The aspect ratio is 0.9, the blockage ratio is 0.1 and the rib pitch-to-height ratio is 10. The flow direction is outward, with a Reynolds number of 1.5 × 104 and a rotation number of 0.3 in both rotational directions. The PIV system rotates with the channel, allowing to directly measure the relative flow velocity with high spatial and temporal resolution. Coriolis forces affect the stability of the shear layers: cyclonic (anticyclonic) rotation inhibits (enhances) the turbulent motion, influencing velocity, vorticity, and turbulence intensity of the flow. The time-resolved measurements show the effect of rotation on the shear layer instability and on the consequent formation of spanwise vortices, as well as on the time trace of the reattachment point. Turbulent energy spectra suggest that all temporal scales are affected by rotation.
  • The thermodynamic implications of electricity end-use for heat and power
    Item type: Journal Article
    Allen, Stephen R.; Hammond, Geoffrey P.; McKenna, Russell (2017)
    Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy
    Thermodynamic ( energy and exergy) analysis can give rise to differing insights into the relative merits of the various end-uses of electricity for heat and power. The thermodynamic property known as exergy reflects the ability to undertake useful work, but does not represent well heating processes within an energy sector. The end-use of electricity in the home, in the service sector, in industry, and the UK economy more generally has therefore been examined in order to estimate how much is used for heat and power, respectively. The share of electricity employed for heat and power applications has been studied, and alternative scenarios for the future development of the UK energy system were then used to evaluate the variation in heat/power share out to 2050. It was found that the proportion of electricity used to meet these end-use heat demands in the three sectors examined were likely to be quite high (5060%), and that these shares are insensitive to the precise nature of the forward projections (forecasts, transition pathways or scenarios). The results represent a first indicative analysis of possible long-term trends in this heat/power share across the UK economy. Whilst the study is the first to consider this topic within such a timeframe, some of the necessary simplifying assumptions mean there are substantial uncertainties associated with the results. Where end-use heat demands are met by electricity, energy and exergy analysis should be performed in parallel in order to reflect the interrelated constraints imposed by the First and Second Laws of Thermodynamics. An understanding of the actual end-uses for electricity will also enable policy makers to take account of the implications of a greater end-use of electricity in the future.
  • Nucleation of steam in high-pressure nozzle experiments
    Item type: Journal Article
    Gyarmathy, G. (2005)
    Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy
Publications 1 - 4 of 4