1D-3D approach for modelling turbine film cooling Since their inception, gas turbines have revolutionized industries worldwide. Their ability to convert the energy of burning fuel into mechanical power or thrust has been essential in a multitude of applications across many sectors. Initially conceived for aviation propulsion during World War II, gas turbines rapidly found their place in the realm of power generation, where they became pivotal, especially considering the sustainable transition we are currently facing. Enhancing fuel efficiency and reducing emissions, or investigating the viability of different kind of fuels, such as biofuels, hydrogen or synthetic fuels, has driven research and investments in the past few years.