Browsing by Supervisor "Elder, R. L."

Browsing by Supervisor "Elder, R. L."

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  • The Design and Analysis of Pipe Diffusers for Centrifugal Compressors 
    Bennett, Ian (1997-12)
    Diffusers are necessary to convert the high velocity head of centrifugal compressor discharge flow into useful static pressure. One diffuser type that has shown a great deal of promise, particularly at high pressure ...
  • Design optimisation of centrifugal pump impellers using parallel genetic algorithm 
    Wahba, Waleed (Cranfield University, 2001-09)
    Computational Fluid Dynamics (CFD) techniques have settled to a stage, where it is possible to gain significant insight into fluid flow processes of turbomachinery. However, the purpose of fluid dynamics naturally goes ...
  • Dissipation and discretization in time marching CFD calculation 
    Alimin, E. K. (Cranfield University, 1995-07)
    This thesis concentrates on accuracy improvements for an existing software package that solves the three dimensional Reynolds Averaged Navier-Stokes equations in rotating coordinates. It is a cell centred explicit ...
  • Dynamic simulation of centrifugal compressors in a process environment 
    Razak, A. M. Y. (Cranfield University, 1984-10)
    The recent developments in process plant design have made it desirable that a better understanding of transient compressor performance within the process plant be gained. The model outlined in this thesis is capable of ...
  • Erosion in centrifugal compressor impellers 
    Harris, P. K. (Cranfield University, 1996-01)
    An experimental and theoretical study of erosion in centrifugal compressor impellers is presented. An experimental rig using laser anemometry techniques was employed to create a database of particle restitution ratios ...
  • Gas liquid separation within a novel axial flow cyclone separator 
    Dickson, Philip James (Cranfield University, 1998)
    Cyclone separators have been described in detail and, although substantial research has been performed on solid / gas devices, the use of cyclones for gas / liquid separation has been comparatively ignored; this is ...
  • High temperature particle -to-metal interaction in a simulated gas turbine environment 
    Salama, I. M. (Cranfield University, 2002-05)
    An experimental study of the particle-to-metal interaction during high temperatures and velocity impact conditions is presented. A novel continuous erosion testing facility have been used to study the effect of particle ...
  • Impeller diffuser interactions in high speed centrifugal compressors 
    He, Ning (Cranfield University, 2001-09)
    In the current research work, a computational analysis of a high-speed centrifugal compressor stage for turbocharger applications is presented. A detailed investigation about the interactions between backswept impeller ...
  • Low speed axial compressor design and evaluation : High speed representation and endwall flow control studies 
    Lyes, Peter A. (Cranfield University, 1999-01-28)
    This Thesis reports the design, build and test of two sets of blading for the Cranfield University low speed research compressor. The first of these was a datum low speed design based on the fourth stage of the DERA high ...
  • The modelling of three-dimensional transonic flows in turbomachines using time-marching techniques 
    Cheng, C. P. (Cranfield University, 1992-01)
    For the efficient design of transonic turbomachinery systems, understanding of the complex flow phenomena inherent in the flow passages is essential. In the present study, a computational technique is adopted to meet ...
  • Modelling variable stator vane setting in multistage axial flow compressors 
    Sun, J (Cranfield University, 1998-08)
    A numerical approach for modelling variable stator stagger in multistage stage axial flow compressors is presented. The development of such an approach has been motivated by the requirements of an optimisation methodology ...
  • Numerical investigation of recess casing treatments in axial flow fans 
    Ghila, Abdurazag M. (Cranfield University, 2003-02)
    T he casing treatment technique for the axial fan has never been more significant since its potential applications were recognized in gas turbines, tunnel ventilation and many other industrial applications where the axial ...
  • Numerical modelling of viscous turbomachinery flows with a pressure correction method 
    Tourlidakis, A. (Cranfield University, 1992-03)
    A fully elliptic computational method for the analysis of steady viscous flow in high speed subsonic centrifugal compressor impellers with tip leakage, is presented. A generalised curvilinear, non-orthogonal grid is ...
  • Optimising stator vane settings in multistage axial flow compressors 
    White, Nicholas M. (Cranfield University, 2002-04)
    There is a common requirement in the process, oil and gas turbine industries for high performance axial flow compressors operating over a wide range of mass flow rate and rotational speed at high efficiency. The trends ...
  • The prediction of transonic flows using a potential method 
    Toolsie, K. O. (1986-09-26)
    Transonic flows are simulated within convergent divergent nozzles and within turbomachinery blade rows. The flow is represented by the conservative full potential equation approximated by a nine-node central-difference scheme, ...
  • Rotating stall inception in fans of low hub-tip ratio 
    Soundranayagam, M. (Cranfield University, 1991-06)
    An investigation was carried out to study the process of rotating stall inception in a low hub-tip ratio fan. Such fans are expected, based on an elementary analysis, to stall from the root. However, experimental ...
  • Simulation of Aero Engine Pre- and Post-Stall Transient Behaviour 
    Merriman, Nicholas Michael (1994-04)
    The commercial and operational attractiveness of improving the specific thrust, whilst minimising the weight, of an aero gas turbine engine, has inevitably led to the compressor operating as near to stall as is ...
  • Stability of split flow fans 
    Tzannatos, E. (Cranfield University, 1986-11)
    The performance requirements of turbofan engines demands a stability and transient capability beyond that associated with the past generations of gas turbine engines. The axial flow fan unit is most vulnerable to loading ...
  • Stall and surge in axial flow compressors 
    Wilson, Alexander George (Cranfield University, 1996-09)
    The objective of the work described in this thesis is twofold; to elucidate the nature of stall and surge in an axial flow aeroengine compressor, and to improve on current computational stall modelling techniques. ...
  • Stall in low hub tip ratio industrial fans 
    Yu, H. (Cranfield University, 1991-11)
    This thesis presents the experimental investigation of stall in low hub tip ratio industrial fans. Detailed measurements were obtained i four fan configurations. The effects of blade setting angle, solidity, blade ...