Paper 7: Radial Gas Turbines

Abstract

The optimum speed range for radial gas turbines is given and the practical advantages of this type of turbine are discussed with reference to some current applications. One-dimensional flow considerations are briefly reviewed and the representation of nozzle and rotor loss data described. Two- and three-dimensional flows in the rotor turbine are examined in the light of recent numerical techniques. Comparison is made of the predictions in the rotor losses using these techniques and some experimental results. The design performance of a small radial gas turbine is given. The mechanical and thermal stresses of rotor life together with materials and methods of manufacture are examined. The results of service experience are reviewed with particular reference to rotor and nozzle life. Future trends in development of the radial gas turbine are indicated.