Aiming to investigate the transient four-quadrant hydrodynamics on blades under the circumferential motion of the steering center, an efficient three-dimensional (3D) model with half blades was established in this paper. The 3D model with half blades accounts for the hydrodynamic loss induced by the complicated mechanical structure, predicting the hydrodynamic performance of the high-load cycloidal propeller with high accuracy. On this basis, the open water manoeuvering performance of the cycloidal propellers in fully azimuth angle was simulated by Reynolds-averaged Navier-Stokes (RANS) solver, and the hydrodynamic loads and flow field characteristics were analyzed in detail. The research shows that the variation of azimuth angle φ induces the rapid response of hydrodynamic loads, which directly affects the direction of ship motion. Compared with φ = 0°, the increase in the azimuth angle of the steering center will enhance the negative impact of the inflow velocity on the wake flow field and the internal flow field within the blades. Additionally, the non-uniform flow in the main thrust direction leads to a significant increase in the undesired net lateral force. Our primary findings revealed in present paper should contribute to accurate prediction of hydrodynamic performance for high-load cycloidal propellers during maneuvering process.

为研究转向中心圆周运动下叶片的瞬态四象限流体动力学，本文建立了一种高效的半叶片三维（3D）模型。半桨叶3D模型考虑了复杂机械结构引起的水动力损失，可以高精度地预测高负荷摆线螺旋桨的水动力性能。在此基础上，利用雷诺平均纳维-斯托克斯（RANS）求解器模拟了摆线桨全方位角的开水操纵性能，详细分析了水动力载荷和流场特性。研究表明，方位角φ的变化引起水动力载荷的快速响应，直接影响船舶运动的方向。与φ  = 0°相比，转向中心方位角的增加会增强流入速度对尾流流场和叶片内部流场的负面影响。此外，主推力方向上的非均匀流动导致不希望的净侧向力显着增加。我们在本文中揭示的主要研究结果应有助于准确预测机动过程中高负载摆线螺旋桨的流体动力性能。