AXISYMMETRIC STUDY OF HEAT TRANSFER IN PRESWIRL ROTOR-STATOR SYSTEM

In a ''direct-transfer'' pre-swirl supply system, cooling air flows axially across the wheel space from stationary pre-swirl nozzles to receiver holes located at a higher radius in the rotating turbine disc. This paper describe axismmetric numerical study in such system. As 3D computations incur long computation time and needs a huge amount of resources, A simplified aixsymmetric model has been built to study the effects of flow parameter on flow and heat transfer in a rotor-stator pre-swirl system. This allows the effects of the main non-dimensional parameters on the flow and heat transfer in the system to be studied with computation time reduced by a factor of around 7 compared with 3-dimensional computation. Available measured data are also compared with computed values obtained from the simplified solver.

Keywords:

Numerical methods , pre-swirl systems , Gas turbine cooling system