Numerical simulation and analysis of three‐dimensional turbulent impinging square twin‐jet flow field with no‐crossflow

The three-dimensional turbulent impinging square twin-jet flow with no-crossflow is analyzed by employing the computational fluid dynamics (CFD) code PHOENICS. The SIMPLEST algorithm and the Jones–Launder k–e two-equation turbulence model are used to simulate the strong turbulence of the three-dimensional impinging twin-jet flow field. The transport properties of velocity, pressure, and structure of exhausted nozzles at a space of S=5D, jet exit height of H=3D, and main nozzle jet Reynolds number of 105 000 are solved in this paper. The axial velocities of the present calculated results are found to be in good agreement with the experimental data of Barata et al. [Barata JMM, Durao DFG, Heitor MV. Impingement of single and twin turbulent jets through a crossflow. AIAA Journal 1991; 29: 595–602]. The calculated results show that the flow field structure of twin-jet impinging on a flat surface is strongly affected by the depth of geometry. Also, the calculated results show that several recirculating zones are distributed around the flow field. Their size and location are different from the two-dimensional flow field due to the effect of flow stretching in the y-direction. In addition, fountain upwash flow is extended to the narrow region of the outer boundary. The phenomena in the present analysis provide a fundamental numerical study of three-dimensional impinging twin-jet flow fields and a basis for the further analysis of three-dimensional impinging twin-jet flow fields with a variable angle nozzle and plate.