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http://dx.doi.org/10.15435/JILASSKR.2019.24.2.58

Effects of a Simplified Mixture Nozzle Geometry on the Acoustic Field in an Aero Gas Turbine Combustor  

Pyo, Yeongmin (강릉원주대학교 기계자동차공학부)
Hong, Sumin (강릉원주대학교 기계자동차공학부)
Kim, Daesik (강릉원주대학교 기계자동차공학부)
Publication Information
Journal of ILASS-Korea / v.24, no.2, 2019 , pp. 58-65 More about this Journal
Abstract
A 3D FEM (Finite Element Method) based Helmholtz solver has been commonly used to characterize fundamental acoustic behavior and investigate dynamic instability features in many combustion systems. In this approach, a geometrical simplification of the target system has been generally made in order to reduce computational time and cost because a real combustor and fuel nozzle have a very complicated flow passage. The feasibility of these simplifications is quantitatively investigated in a small aero gas turbine nozzle in term of acoustic characteristics. It is found that the simplification in a nozzle geometry during the 3D FEM analysis process has no great influence on the acoustic modeling results, while the calculation complexity can be improved for a similar modeling accuracy.
Keywords
Aero gas turbine combustor; Combustion instability; Thermoacoustic analysis; 3D Finite element method;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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