The aim of this study is to investigate the flow structure analysis of impinging turbulent flow of twin jets against a wall using experimental data and 2-D numerical simulation of the flow. The raw experimental data has been provided by the University of Nantes, France. The analysis of the raw experimental data requires some computer programming, which is done using Matlab software. Openfoam software is used to carry out numerical simulations as well. Then analysis of flow structures using experimental data in the form of mean flow velocity, turbulence kinetic energy, Reynolds stresses and POD modes were presented. Mean flow velocity for different frequencies is examined until the formation frequency of detail structures of the flow such as Von-Karman and Kelvin-Helmholtz instabilities achieved. In order to check the values of turbulence kinetic energy and Reynolds stresses in areas where the instabilities is formed, turbulence kinetic energy and Reynolds stresses corresponding to the frequency of formation of the instabilities were investigated. Using POD modes, the energy of turbulence structures is obtained at any time. Also using the modes, the energy of each structure that is formed in a specific moment is obtained, that is leading to a more accurate understanding of the flow field. After doing a suitable grid study, the process of two-dimensional numerical simulations using RANS models, such as k-?, k-?-RNG, k-? and k-?-SST were performed, and turbulent features of the flow were extracted. The aim of these simulations is to show overview of the flow field and not extracting detail structures of the flow. Then the turbulent features were compared with corresponding experimental results in order to assess the ability of the models. Results showed the turbulence models can predict acceptable results in the free jet area and extract suitable features in this region, but they had weak treatment in the impingement region and can not predict the features of the flow in this region correctly. Keywords Impinging twin-jet, Turbulent, POD, RANS, Openfoam.