In this study, a pressure-swirl device with a spiral path was designed, built, and tested at various inlet pressures, and the experimental results were used to verify the accuracy of the numerical solution. Finally, we conducted a numerical investigation on the impact of fuel temperature on kerosene spray at four different temperatures: 243 K (approximately 10 degrees below the freezing point), 273 K (approximately equidistant between the freezing and flash point temperatures), 300 K (approximately 10 degrees below the flash point temperature), and 324 K (within the temperature range of the flash point). The simulation conditions, including a fixed mass flow rate of 10 gr/s, remained constant across all four cases, with the only variable being fuel temperature. The results indicate that as the fuel temperature increased, the spray angle increased by 45.27%. Furthermore, the most significant changes in the discharge coefficient were observed between temperatures of 273 and 324 K, leading to an increase of 18.01% in the discharge coefficient. Furthermore, within the liquid state range of the fuel, increasing the temperature resulted in a decrease in the Sauter mean diameter (SMD), while within the vapor state range, increasing the temperature led to an increase in the SMD. Additionally the pressure drop, discharge coefficient, and SMD of the spray are similar at temperatures of 243 and 324 K.