The structure of fuel sprays in cylindrical combustion chambers is theoretically investigated using computer models of current interest. Three representative spray models are considered: 1) a locally homogeneous flow (LHF) model, which assumes infinitely fast interphase transport rates; 2) a deterministic separated flow (DSF) model, which considers finite rates of interphase transport but ignores effects of droplet/turbulence interactions; and 3) a stochastic separated flow (SSF) model, which considers droplet/turbulence interactions using stochastic methods. Various flow conditions are considered to examine the influence of droplet size and swirl strength on the spray flame structure. Comparison of calculated results with the experimental data shows that general features of the flow structure can be predicted with reasonable accuracy using the two separated flow models. In contrast, the LHF model overpredicts the rate of development of the flow. It is found that large swirl is associated with a high rate of evaporation and intensive turbulent mixing and combustion. Increased droplet diameter produces a longer flame length and reduces combustion intensity when compared to smaller initial droplet diameters.