As the high-speed submerged body moves through the water, it causes changes in the free surface level and creates waves above its surface, Also it can cause a decrease in water pressure which can lead to the breakdown of water and the formation of vapor bubbles around its body. In this study, immersed geometry was modeled with the NACA hydrofoil series to simulate the free surface wave and vapor bubble formation using numerical methods. By changing the hydrofoil’s geometry, angle of attack, and cavitation number, the wave amplitude and bubble shape were investigated. As the hydrofoil nears the water surface, the importance of the free surface becomes more noticeable. This causes a larger wave amplitude and a smaller cavitation bubble around the hydrofoil. When the submerged depth decreases, the lift and drag coefficients become smaller. Increasing the flow speed and reducing the pressure on the hydrofoil\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'s surface led to the formation of a bigger bubble in low-pressure regions and decreased the amplitude of the free surface wave.

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