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Isothermal models of gas-turbine combustors

Published online by Cambridge University Press:  20 April 2006

A. S. Green  and
J. H. Whitelaw
A. S. Green
Affiliation:
Department of Mechanical Engineering, Imperial College, London SW7 2BT Present address: Atkins Research and Development, Epsom, Surrey, U.K.
J. H. Whitelaw
Affiliation:
Department of Mechanical Engineering, Imperial College, London SW7 2BT
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Abstract

Measurements of mean axial velocity have been obtained in two perspex models which simulate important features of gas-turbine combustors and are compared with calculations based on the numerical solution of the three-dimensional equations that represent conservation of mass and momentum. The measurements show, for example, the effect of primary jet trajectory on the magnitude and proportion of total mass flow contained in the primary vortex. They also allow the value of the calculation method to be appraised and, in this context, it is shown that the local velocity values are subject to large errors in small regions of the flow but important parameters, such as the length of the primary vortex, are represented more than adequately for engineering purposes. Errors due to numerical approximations appear to be at least as important as those due to the two-equation turbulence model used to represent turbulent features of the flow.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 126 , January 1983 , pp. 399 - 412
Copyright
© 1983 Cambridge University Press

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References

Chorin, A. J. 1968 Numerical solution of the Navier–Stokes equations Math. Comp. 22, 000.Google Scholar
Dittrich, R. T. 1958 Discharge coefficients for combustor-liner-air-entry holes. NACA TN 3924.Google Scholar
Durst, F., Melling, A. & Whitelaw, J. H. 1981 Principles and Practice of Laser-Doppler Anemometry, 2nd edn. Academic.
Green, A. S. 1981 Isothermal models of combusion chamber flows. Ph.D. thesis, University of London.
Green, A. S. & Whitelaw, J. H. 1980 Measurement and calculations of the isothermal flow in axisymmetric models of combustor geometries J. Mech. Engng Sci. 22, 119.Google Scholar
Harsha, P. T. 1981 Combustion modelling for practical applications. In Proc. Session on Prediction of Turbulent Reacting Flows in Practical Systems. A.S.M.E.
Jones, W. P. & McGUIRK, J. J. 1980a Mathematical modelling of gas turbine combustion chambers. AGARD CP275, Paper 4.
Jones, W. P. & McGuirk, J. J. 1980b Computation of a round jet discharging into a confined mass flow. In Turbulent Shear Flows 2 (ed. L. J. S. Bradbury, F. Durst, B. E. Launder, F. W. Schmidt & J. H. Whitelaw), p. 233. Springer.
Jones, W. P. & Whitelaw, J. H. 1982 Calculation methods for reacting turbulent flows: a review. To be published in Combust. & Flame.Google Scholar
Libby, P. A. & Williams, F. 1980 Turbulent Reacting Flows. Springer.
McGuirk, J. J. & Rodi, W. 1978 A depth-averaged mathematical model for the near field of side discharges into open-channel flow J. Fluid Mech. 86, 761.Google Scholar
Roache, P. J. 1976 Computational Fluid Dynamics. Hermosa.
White, A. J. 1980 The predictions of the flow and heat transfer in the vicinity of a jet in crossflow. A.S.M.E. Paper 80-WA/HT-26.