Abstract
The flow field of a twin-entry radial gas turbine is investigated to give a better insight into the flow behaviour under unsteady state conditions and to understand the influence of pulsating gas flows on the aerodynamic performance of this type of a radial turbine. Unsteady boundary conditions as imposed by an internal combustion engine environment are specified at inlet and at outlet of this turbine according to Ehrlich Daniel (1). Analysis of pressure fluctuations due to the turbine components interactions by Fast Fourier transform FFT have revealed a space-time periodic behaviour that may be described by the double Fourier decomposition. The time mode analysis has permitted to determine the different frequencies and the prevailing modes of interactions. The turbine maximum isentropic efficiency is seen to occur when the mass flow at the shroud-side of the volute is higher than the hub-side.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
