Study on Fluid-Induced Vibration Power Harvesting of Square Columns under Different Attack Angles

Table 1

Calculation parameters for square column VIVPEH system.

Symbols and units	Physical meanings	Numerical values
[kg]	Square column mass	0.2979
[N/m]	Elastic coefficient of the system	579~584
[N·s/m]	Damping of the system	0.0325~0.45
[m]	Square column side length	0.0016
[degree]	Angle between the square column and the inflow velocity	0~75
	Damping ratio of the system	0.00121
[Hz]	Natural frequency of the system	7.012~7.132 (water)
[nF]	Capacitance	120
	Electromechanical coupling coefficient	1.55 × 10^−3
[Pa·s]	Dynamic viscosity	0.0011379
[m^2/s]	Kinematic viscosity	1.139 × 10^−6 (water)
[kg/m^3]	Density	999.1026 (water)