AbstractA tubular linear vibration generator applied to the energy harvester based on vortex‐induced is proposed and analyzed in this paper. First, the permanent magnet of the generator is placed on the inner side of the winding, and the outer side of the winding is improved by adding magnetically permeable housing to increase the generated power. Then, the optimal magnet magnetization method, size of the winding coil, wire diameter, and housing material are evaluated by finite element analysis. Finally, the prototype using radial magnets is fabricated and fixed on the energy harvester. The vibration displacement, the induced voltage of the coil, and the generated power at different water velocities are measured. The generators with different permeable housings are fabricated to verify the accuracy of the theory. The experiment results show the maximum average power harvested is 5.5 mW of the TVLG at the water speed of 0.7 m/s, for the coil of 0.2 mm wire diameter, 8 cm height, and 2,000 turns. Under the effective water speeds, the power obtained by the generator with magnetically permeable housing is more than 70% higher than that obtained by the generator without housing.