Shahrood University of Technology Journal of Solid and Fluid Mechanics 2251-9475 10 4 2020 12 21 Numerical study of flow characteristics in a single-element Lean Direct Injection (LDI) combustion chamber Numerical study of flow characteristics in a single-element Lean Direct Injection (LDI) combustion chamber 287 302 2007 10.22044/jsfm.2020.8538.2940 FA Sseyyed H. Abbasi mechanics,mechanics,tarbiat modares,tehran,iran F. Ommi Tarbiat Modares University Z. Saboohi Mechanical Engineering Aerospace Aerospace Research Institute, iran Journal Article 2019 06 07 Studying the combustor flow field helps identify effective fuel and air mixing areas. The purpose of this paper is to investigate the structure of cold flow in a single-element Lean Direct Injection combustor. In studying and modeling of a turbine engine combustor, it is important to identify the areas of swirling, reversal and symmetry of the flow inside the chamber due to its influence on the rate of fuel and air mixing and also to study the reaction flow accurately. In this paper, the effect of operating pressure on the turbulent flow is studied. Since computational fluid dynamics are very time-consuming to solve the reacting flow problems, it is necessary to select the appropriate turbulence model that saves time with good accuracy. Comparing the computational results of the k-ɛ Realizable and Reynolds stress turbulence models (RSTM) and computational errors analysis, the maximum error was obtained for the Reynolds stress model of 31% and for the k-ɛ Realizable model of 37% compared to the experimental data. The difference between numerical results of turbulence models showed that the low-cost k-ɛ Realizable model is acceptable for the studied studies and can be used to model the reacting flow of an LDI combustor with highly swirl flow. Studying the combustor flow field helps identify effective fuel and air mixing areas. The purpose of this paper is to investigate the structure of cold flow in a single-element Lean Direct Injection combustor. In studying and modeling of a turbine engine combustor, it is important to identify the areas of swirling, reversal and symmetry of the flow inside the chamber due to its influence on the rate of fuel and air mixing and also to study the reaction flow accurately. In this paper, the effect of operating pressure on the turbulent flow is studied. Since computational fluid dynamics are very time-consuming to solve the reacting flow problems, it is necessary to select the appropriate turbulence model that saves time with good accuracy. Comparing the computational results of the k-ɛ Realizable and Reynolds stress turbulence models (RSTM) and computational errors analysis, the maximum error was obtained for the Reynolds stress model of 31% and for the k-ɛ Realizable model of 37% compared to the experimental data. The difference between numerical results of turbulence models showed that the low-cost k-ɛ Realizable model is acceptable for the studied studies and can be used to model the reacting flow of an LDI combustor with highly swirl flow. https://jsfm.shahroodut.ac.ir/article_2007_5182c7ddfce9b923b3cfc7993d1579b2.pdf