Predictive models of heating and evaporation of fuel droplets in the dense region of sprays are essential to optimize the design of combustion chambers in internal combustion engines.This topic is addressed here,based on an experimental study using lines of equally-spaced droplets evaporating in a high temperature chamber(540℃).The experimental set-up allows controlling several key parameters including the droplet size,velocity and the inter-droplet distance.The volume-averaged temperature of the droplets is measured using two-color laser-induced fluorescence,while the droplet size and velocity are deduced from a double-pulse shadowgraphy method.These measurement techniques are combined to evaluate the heating and evaporation rates of singlecomponent droplets made of ethanol,n-dodecane,n-decane and isohexane.Some parameters,namely the droplet size,the droplet velocity,the spacing between the droplets and the fuel injection temperature,are modified during the experiments.Nusselt and Sherwood numbers are estimated from the experimental data and compared with a classical correlation established for the isolated droplet,which allows quantifying the effects of droplet interactions on the heat and mass transfers.Droplet spacing appears to have a strong effect on the size and temperature evolutions when the measurements are compared to the isolated droplet for which evaporation models already exist.Hence,the geometrical arrangement of the droplets seems to be the main parameter that should be accounted for in the droplet interactions.However,it also seems necessary to consider the development of a boundary layer around the droplet lines.As the boundary layer develops with the distance from the injector,forced convection has a more and more limited influence on the heat and mass transport.Inside the boundary layer,heat and mass transfers are governed by the transport by the Stefan flow and by diffusion.A dimensionless empirical correlation that aims taking into account these different aspects of the interactions is finally established.