Thrust, efficiency, induced pressure on hull surface and negative pressure distribution on blade surface of five conventional propellers and twenty-eight tandem propellers were studied comprehensively by numerical method to assess the ability of two different types of propellers in dealing with efficiency, cavitation, vibration and noise problems. The flow field was simulated by solving RANS equations with SST k-ω turbulence model. For the conventional propellers, the effect of disk ratio and number of blades was investigated. For the tandem propellers, the vortex-blade interaction and effect of blade phase angle and diameter ratio were studied. Then, a comparison was made between new tandem propellers and conventional propellers. Results show that, compared with the conventional propeller with larger disk ratio and more blades, the efficiency of the tandem propeller is much higher in most working conditions, the induced pressure is comparable and cavitation performance is a little bit worse; compared with the conventional propeller with smaller disk ratio and fewer blades, although the tandem propeller has relatively lower efficiency, the induced pressure is significantly reduced and cavitation is improved obviously. The study shows that the new tandem propeller has more advantages and potentials than the conventional propeller in dealing with these problems.

通过数值方法，对五个常规螺旋桨和二十八个串联螺旋桨的推力，效率，壳体压力和叶片表面负压分布进行了综合研究，以评估两种不同类型螺旋桨在效率，气蚀，振动方面的能力。和噪音问题。通过用SST k - ω求解RANS方程来模拟流场湍流模型。对于常规螺旋桨，研究了盘比和叶片数的影响。对于串联螺旋桨，研究了涡旋叶片相互作用以及叶片相角和直径比的影响。然后，在新的串联螺旋桨和常规螺旋桨之间进行了比较。结果表明，与常规螺旋桨相比，传统的螺旋桨具有更大的盘比和更多的叶片，在大多数工作条件下，串联螺旋桨的效率要高得多，其诱导压力是可比的，而空化性能则稍差一些。与传统的盘比较小，叶片较少的螺旋桨相比，尽管串联螺旋桨效率较低，但诱导压力显着降低，气穴现象明显改善。