Fluid dynamics characteristic is an important factor to be considered, in burners design. In this study, a combination of experimental and numerical method was used to investigate the effects of tangential inlet thickness and tangential velocity on fluid dynamics characteristic in a cyclone burner. Experimentally, backflow pattern in the burner was observed through paper slices dynamic in a transparent burner. Meanwhile, numerically, fluid dynamics in the burner was simulated by standard k- turbulent model, using Ansys-Fluent software. At certain values of RIA and IIT, experiment results showed indication of backflow formation in the burner. The same backflow phenomenon was also observed in the simulation results. It turned out that, the backflow pattern and position of simulation results were similar to the experiment results, which closely resembled a tornado-tail. The research also indicated that the results of simulated static pressure drop were closely approaching the experiment results, particularly for IIT values  4.3. Mean deviation of static pressure between the simulation and the experiment results, for varied range of RIA and IIT, was 14.67%. From the results above, it was obvious that backflow pattern and static pressure in cyclone burners were greatly influenced by the thickness and tangential velocity. In addition, the effect of tangential velocity was more dominant compared to the thickness. For IIT values  4.3, standard k- turbulent model could predict fluid dynamics in cyclone burners with a satisfying result.