A pressure jump method for modeling waterjet/hull interaction
A pressure jump method for modeling waterjet/hull interaction
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DOI：
10.1016/j.oceaneng.2014.06.014
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发表时间：
2014-09
影响因子：
5
通讯作者：
A. Eslamdoost;L. Larsson;R. Bensow
中科院分区：
文献类型：
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作者：
A. Eslamdoost;L. Larsson;R. Bensow
提出了一种快速、鲁棒的喷水船体相互作用仿真方法。通过平衡喷水推进装置的推力和船体阻力，提出了一种计算喷水推进装置流量的方法。该方法称为压力跃变法，可与势流/边界层方法和更先进的粘性流方法（例如RANS型）结合使用。在目前的工作中，势流/边界层的方法已被使用。通过预测结果与实测数据的比较，验证了该方法的有效性。进气道速度比、喷管速度比、总推力和推力减额均在试验范围内。对于所研究的情况，与裸船体的情况相比，喷水装置产生的力和力矩使船体下沉得更深，并实现向下倾斜。在计算和测量中，推力扣除分数都是正的。
A fast and robust method for the simulation of waterjet hull interaction is presented. Balancing the thrust force of the waterjet unit with the hull resistance, a method is developed for the prediction of the flow rate through the unit. The method is called the Pressure Jump Method and may be used in combination with both potential flow/boundary layer methods and more advanced viscous flow methods, for instance of the RANS type. In the present work the potential flow/boundary layer approach has been used. Validation of the method is accomplished through comparison of predicted results with measured data. The inlet velocity ratio, nozzle velocity ratio, gross thrust and thrust deduction are all within the experimental scatter. For the case studied the force and moment created by the waterjet unit cause the hull to sink deeper and attain a bow down trim compared to the bare hull case. The thrust deduction fraction is positive both in the computations and the measurements.