侧体排水量比对三体船阻力性能的影响

The resistance performance affected by side-hull displacement ratio of trimaran

为了探讨三体船侧体排水量比变化对三体船阻力性能的影响,基于RANSE方法,采用比较适用于三体船的Realizable k-ε湍流模型,利用VOF法捕捉自由液面,针对5种侧体排水量比方案,在不同傅汝德数下对三体船的粘性流场进行数值模拟计算,得到相应情况下的船体摩擦阻力及剩余阻力,分析比较剩余阻力曲线及自由面波形,结果表明,低航速下侧体排水量比的变化对三体船阻力性能影响不明显,中高航速下较小的侧体排水量比的三体船兴波阻力性能更佳;同时将计算结果与试验数据进行比较,验证了计算结果的可靠性。

In order to investigate the resistance performance affected by side-hull displacement ratio of trimaran, based on the Reynolds averaged Navier-Stokes(RANSE) method, and use the realizable k-ε turbulent model that was more suitable for trimaran simulation, the volume of fluid(VOF) method were used to capture the free surface. For five kinds of sidehull displacement ratio condition, simulations under different Froude number of viscous flow fields around trimaran were conducted, friction and residual resistance of the hull were obtained, and comparing the residual resistance curve and the free surface wave. The result shows that when the trimaran is in low speed, the resistance performance affected by side-hull displacement ratio of trimaran is not obvious. In the high speed range, the resistance performance of small side-hull displacement ratio is better. And the reliability of the calculated results is verified by comparing with the model test data.