数值模拟在船型方案优选中的应用

随着计算机和CFD技术水平的提高，数值模拟所需时间逐渐缩短、准确度逐步提高，利用数值模拟作为一种辅助手段进行方案择优已经逐渐流行。本文利用商用软件对广船国际提供的某油船三种线型进行了设计和结构吃水工况下的数值计算，包括阻力、自航计算，并且根据ITTC推荐规程做了实船尺度下的数据分析；以实船尺度下保持目标航速所需要的收到功率最小为评判标准，通过对该船三个方案线型不同吃水情况下计算结果的比较分析，评价了线型方案的优劣。通过数值模拟结果与物理试验结果的比较分析，验证了本文计算方法可靠性和准确性，也展示了数值模拟在船型方案择优过程中的作用，可以用于综合评价不同方案线型的船舶水动力性能。

The Application of Numerical Simulation on Selection of Different Hull Line Schemes in the Design Phase

With the development of computers and CFD technology, the required numerical simulation time has now been much shortened and the accuracy has also been improved. As an auxiliary means, numerical simulation is becoming more and more popular nowadays in selecting the optimum among different schemes. This paper shows the application of numerical simulation on the selection of different hull line schemes in the design phase.In order to evaluate the performance of an oil tanker designed by GSI with three different hull line schemes comprehensively, numerical simulation including resistance and self-propulsion tests in model scale was conducted in the design and scantling draft respectively by using the commercial software STARCCM+. Results were then analyzed in both model and full scale, the full scale data are translated from model scale data according to the ITTC recommended procedures. By comparing results from the three different schemes in the design and scantling draft, the hull line scheme with best performance was obtained.