Method for measuring drag reduction performance of super-hydrophilic coating

The invention discloses a method for measuring the drag reduction performance of a super-hydrophilic coating. The method comprises the following steps: setting a plurality of different preset shear rates; setting a plurality of preset time periods; setting the preset spraying thickness of the super-hydrophilic coating to be measured; respectively obtaining a plurality of apparent viscosity reference values of the oil sample to be detected under each preset shear rate; spraying a to-be-detected super-hydrophilic coating with a preset spraying thickness on a coaxial cylinder rotor of the coaxial cylinder viscometer, and generating a water ring on the surface of the super-hydrophilic coating; under each preset shear rate, respectively obtaining a plurality of apparent viscosity contrast values measured by the coaxial cylinder viscometer after the coaxial cylinder viscometer is subjected to constant temperature for a plurality of preset time periods; and for the apparent viscosity reference ...