TITLE:
Structural and Conceptual Design Analysis of an Axial Compressor for a 100 MW Industrial Gas Turbine (IND100)
AUTHORS:
D. S. Aziaka, E. O. Osigwe, B. T. Lebele-Alawa
KEYWORDS:
Gas-Turbine, Structural Design, Conceptual Design Analysis, Axial Compressor, Mechanical Integrity
JOURNAL NAME:
World Journal of Mechanics,
Vol.4 No.11,
November
28,
2014
ABSTRACT: The
structural design of the IND100 axial compressor requires a multistage
interrelationship between the thermodynamic, aerodynamic, mechanical design and
structural integrity analysis of the component. These design criteria,
sometimes act in opposition, hence engineering balance is employed within the
specified design performance limits. This paper presents the structural and
conceptual design of a sixteen stage single shaft high pressure compressor of
IND100 with an overall pressure ratio of 12 and mass flow of 310 kg/s at ISOSLS
conditions. Furthermore, in order to evaluate the conceptual design analysis,
basic parameters like compressor sizing, load and blade mass, disc stress
analysis, bearings and material selections, conceptual disc design and rotor
dynamics are considered using existing tools and analytical technique. These
techniques employed the basic thermodynamic and aerodynamic theory of axial
flow compressors to determine the temperature and pressure for all stages,
geometrical parameters, velocity triangle, and weight and stress calculations
of the compressor disc using Sagerser Empirical Weight Estimation. The result
analysis shows a constant hub diameter annulus configuration with compressor
overall axial length of 3.75 m, tip blade speed of 301 m/s, maximum blade
centrifugal force stress of 170 MPa, with major emphasis on industrial
application for the structural component design selections.