Study on Flow Analysis of Three-Dimensional Screw Propeller With Respect to Rotational Speed Variable
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This study aimed at conducting a flow analysis of the pressure distribution, discharge flow rate, and consequent thrust force accordingto the rotational speed of a three-dimensional screw propeller, and then investigating the effect of the rotational speed on the characteristics of thescrew propeller by varying the relevant speed (3200, 2400, 1600, 800 rpm). In particular, the computational domain was considered by the analysisin the blades and outlet chamber, using boundary conditions. The difference between the minimum and maximum pressures was 5.5 MPa under thegiven conditions. The discharge flow rate at this pressure difference was on the level of 1956.67 kg/s, as a thrust force of 47083.7 T(N) was obtained. This study showed that the discharge flow rate linearly increased with the rotational speed, proportional to the RPM, while the thrust force wasgradually and steadily increased with the relevant speed. In addition, it was proved that the occurrence of cavitation under the given conditions wasclosely related to the decrease in the durability of the screw propeller because the thrust force depends on the speed.
Abstract
This study aimed at conducting a flow analysis of the pressure distribution, discharge flow rate, and consequent thrust force accordingto the rotational speed of a three-dimensional screw propeller, and then investigating the effect of the rotational speed on the characteristics of thescrew propeller by varying the relevant speed (3200, 2400, 1600, 800 rpm). In particular, the computational domain was considered by the analysisin the blades and outlet chamber, using boundary conditions. The difference between the minimum and maximum pressures was 5.5 MPa under thegiven conditions. The discharge flow rate at this pressure difference was on the level of 1956.67 kg/s, as a thrust force of 47083.7 T(N) was obtained. This study showed that the discharge flow rate linearly increased with the rotational speed, proportional to the RPM, while the thrust force wasgradually and steadily increased with the relevant speed. In addition, it was proved that the occurrence of cavitation under the given conditions wasclosely related to the decrease in the durability of the screw propeller because the thrust force depends on the speed.
참고문헌 (11)
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