Unsteady Flow and Vibration Analysis of the Horizontal-Axis Wind Turbine Blade under the Fluid-Structure Interaction

Table 2

The grid-independent validation of the fluid domain and structural domain.

Item	Cell face size at the blade surface
	0.2 m	0.3 m	0.5 m
	Cell face size at the rotated domain
	0.5 m	1 m	2 m
Total number of elements	5,231,404	2,016,684	1,155,913
Rotor power	1.5074 kW	1.5109 kW	1.4809 kW
Relative error (%)	0.49	0.73	1.27