Reducing the Erosion of Nozzle Blade C-9015A in Steam Turbine with the Help of Parallel Grooved Surface

This paper presents a new surface for improving the nozzle blade C-9015A of wet-steam turbines in modern power plants by reducing the erosion on the surface with the help of a parallel grooved surface. Moisture in wet steam causes the surface of the nozzle to wear out and even break the blades over time. The erosion of a nozzle surface can be decreased by putting a grooved surface in the direction parallel to the steam flow on the nozzle surface. By placing the grooved surface in the direction of the steam flow on the surface of the nozzle, the angle between the surface and the impact of the droplets decreases. As the angle between the surface and the impact of the drop decreases, the erosion energy on the surface also decreases. This article discusses the physics of droplet impact with different types of surfaces and the movement of water droplets in a two-phase flow. Furthermore, finally, the results of the effective erosion energy due to the impact of drops with different diameters on the smooth blade surface and a grooved blade surface are compared with each other. It is concluded from the results that the erosion of drops on the grooved blade surface is less than the erosion on the smooth blade surface.