Exergy Analysis and Numerical Investigation of the Effects of Nozzle Profile on the Partially-Admitted Supersonic Turbine's Performance

Authors

1 Department of Aerospace Eng., KNTU

2 Faculty Member

3 faculty member

4 Faculty member Islamic Azad University Tehran Science and Research Branch

5 Researcher

Abstract

In the turbines with a low mass-flow inlet, the partial-admission teqnique is used. Inorder to obtain a high specif work, it is necessary to use the turbine in supersonic flow regime. Firstly in this paper, the partially-admitted supersonic turbines and their applications are described. The main objective of the paper is to investigate the effects of the stator's nozzle divergent part profile on the turbine's performance. To this end, several different models are made using a nozzle profiling techniques. The flow field in the complete turbine pack is numerically simulated with the aim of computational fluid dynamics. The turbine's performance is investigated by examining the efficiency of the first law and the second law of thermodynamics, as well as the analysis of exergy and exergy degradation. The results show that the selection of suitable nozzle profile has an effective role in increasing the turbine efficiency and prevention of wasting energy.

Keywords


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