Spraying method of temperature indicating paint on surface of double-wall turbine blade of aero-engine

The invention belongs to the technical field of aero-engine double-wall turbine blade surface temperature indicating coating spraying design, and particularly relates to an aero-engine double-wall turbine blade surface temperature indicating coating spraying method. The temperature indicating coating is introduced into the turbine blade through the upper edge air inlet pipe and the lower edge air inlet pipe and is sprayed out through the air film holes in the surface of the turbine blade, the flowing condition of cooling air on the turbine blade is simulated, the air flow sprayed out of the air film holes in the temperature indicating coating spraying process can effectively prevent the temperature indicating coating from blocking the air film holes, it is guaranteed that the temperature indicating coating is evenly sprayed on the surface of the turbine blade, and the spraying efficiency is improved. And the temperature distribution of the surface of the turbine blade is measured and obtained comprehensively