Document Type : Original Article

Authors

1 Islamic Azad University, Research Sciences Branch, Tehran

2 Assistant Professor of Mechanical Engineering, Development and Optimization of Energy Technologies Division, Research Institute of Petroleum Industry (RIPI)

10.22034/jast.2022.302883.1097

Abstract

In this research, combustion modeling inside the combustion chamber of a typical turboprop engine has been investigated. The complex geometry of this combustion liner was modeled according to the technical drawings and the turbulent flow and internal combustion were simulated numerically and three-dimensionally. The non-premixed combustion model is used to simulate combustion and the K-ω method is used to simulate turbulent flow. This study investigated how the combustion phenomenon occurs, the internal temperature distribution, the outlet, and the wall of the combustion tube, for which comprehensive three-dimensional data were not previously available. These simulations have identified the weaknesses of the combustion tube and by eliminating these weaknesses, the problem of reducing the efficiency of several gas turbine engines has been solved. Comparison of the results of the present study with a similar numerical analysis showed that the results of this study are more in line with laboratory results. The results of the simulation of combustion pipe defects show that the combustion liner that had a welding line near the outlet had a 25% higher pressure drop than a typical combustion liner and the effective cross-sectional area of ​​the fluid flow was reduced by 11%. The output of a repaired combustion tube is different from a typical type.

Keywords

Main Subjects

Article Title [Persian]

Numerical simulation of combustion with the aim of obtaining temperature distribution, identifying and eliminating power reduction factors of a gas turbine engine

Authors [Persian]

  • Hamed Arhami 1
  • Mohammad Mazidi Sharfabadi 2

1 Islamic Azad University, Research Sciences Branch, Tehran

2 Assistant Professor of Mechanical Engineering, Development and Optimization of Energy Technologies Division, Research Institute of Petroleum Industry (RIPI)

Abstract [Persian]

In this research, combustion modeling inside the combustion chamber of a typical turboprop engine has been investigated. The complex geometry of this combustion liner was modeled according to the technical drawings and the turbulent flow and internal combustion were simulated numerically and three-dimensionally. The non-premixed combustion model is used to simulate combustion and the K-ω method is used to simulate turbulent flow. This study investigated how the combustion phenomenon occurs, the internal temperature distribution, the outlet, and the wall of the combustion tube, for which comprehensive three-dimensional data were not previously available. These simulations have identified the weaknesses of the combustion tube and by eliminating these weaknesses, the problem of reducing the efficiency of several gas turbine engines has been solved. Comparison of the results of the present study with a similar numerical analysis showed that the results of this study are more in line with laboratory results. The results of the simulation of combustion pipe defects show that the combustion liner that had a welding line near the outlet had a 25% higher pressure drop than a typical combustion liner and the effective cross-sectional area of ​​the fluid flow was reduced by 11%. The output of a repaired combustion tube is different from a typical type.

Keywords [Persian]

  • Numerical simulation
  • three-dimensional turbulent flow
  • combustion chamber
  • engine test chamber
  • defective engines