This study utilized numerical simulation to probe the effects of incorporating perforated bluff bodies in a velocity field. Assuming constant gas flow rates and the absence of chemical reactions between gases, this study performed separate calculations for various hole configurations and gas injection angles. The installation of bluff bodies converts a substantial amount of axial momentum into radial and tangential momentum, increasing swirling and enhancing turbulence intensity. Featuring the release of carbon dioxide (CO2) from a central jet and air from an annuar jet, this study analyzed the velocity field and the distribution of carbon dioxide and air to investigate the mixing effieicncy of different multi-holed bluff-body configurations. Three variations of perforated bluff-bodies with different hole counts (H = 3, 6, and 12 holes) and three different injection angles (θ = 45°, 60°, and 90°) were implemented, along with a baseline nozzle configuration without a perforated bluff body (e.g., Fig. 1). The perforated bluff bodies significantly improves both the swirl number and the turbulence intensity relative to the flow field of the pure nozzle. The CO2 concentration released from the central jet also decreased threefold as the turbulence intensity increased. The results inspires potential application in combustion fields [1,2].