Direct material deposition (DMD) is the technology of producing new parts and making coating depositions, where much powder should be transported with high accuracy. At high powder flow rates (50–100 g/min), the interaction between a gas and powder flow (two-way coupling), as well as collisions between particles, impose a significant influence on the powder jet focusing. In the light of these effects, the paper presents the numerical analysis of the structure of gas-dispersed flows formed by continuous coaxial nozzles. Considerable variations in the gas-dynamic flow are shown in the focus area when the powder volume fraction is above 0.5 %. The obtained results are in a good agreement with the experimental ones and show the importance of the two-way coupling of both phases. The efficiency of a triple coaxial nozzle with a non-parallel arrangement of channels for carrier and shaping gases is analyzed for different powder particle sizes.