This article presents a process of numerically predicting and experimentally verifying the dispersion quality and penetration level of fuel particles entering and moving in various directions relative to vortex engine walls. If the length scale of particles considered in this study is not comparable to the chamber length and, furthermore, the density is ignored, the effect of the particle on the flow field can be neglected and a one-way solution will be viable for the problem. The solutions in each case are carried out to estimate the particle trajectory and parameters affecting it. The governing equations are converted to a set of nonlinear, coupled, ordinary differential equations (ODEs) of second order, and solved by a numerical scheme. The results indicate that a high centrifugal force pushes the particles toward the sidewall. This propelling force becomes more eminent when the particles approach the chamber center-position. Moreover, the results reveal that the best injection configuration in the vortex engine arrangement is simply not the head side arrangement; the sidewall, and end side composition arrangement of the injection demonstrates to provide the best desired outcomes.