Abstract:
Compressors are a type of turbomachinery used to increase the pressure of a fluid. Among them, axial compressors possess high mass flow, which benefits many applications, such as gas turbines in aeronautic engines that require a significant amount of air in the combustion chamber to burn the fuel. Inlet Guide Vanes (IGVs) are utilized to enhance the performance and broaden the operational range of axial compressors by applying pre-swirl to the incoming flow, reducing the Mach number through a reduction in resultant relative velocity. The objective of this study is to investigate an axial compressor with an IGV stage and its influence on the compressor performance parameters using CFD based models. A base model with one IGV blade angle was compared/validated against experimental data to ensure the model prediction capabilities in the IGV blade investigation, whereas the blade angles were changed several times to cover all conditions. The results revealed that increasing the IGV angle led to a decrease in compression ratio; however, efficiency improved, peaking at 15º, where the isentropic efficiency was 84.5%, a 5% improvement. However, at higher angles, the formation of vortices caused a decrease in efficiency.
Referência:
QUEIROZ, Patrick Donegá; ROCHA, André Damiani; KOGISHI, André Mitsuo; CASTRO, Felipe Santos de; DANTAS, João Lucas Dozzi. COB-2023-1233: investigation od swirling flow effect on an axial compressor parameters via CFD. In: INTERNATIONAL CONGRESS OF MECHANICAL ENGINEERING, 27., 2023, Florianópolis. Proceedings… 10 p.
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