To enhance the hydrodynamic performance and rust-removal efficiency of the UHP water jet rotary sprayers, a novel layout optimization strategy was proposed based on the PSO algorithm. The sweep impinging trajectory, accumulative impinging-duration, and self-rotary models were successively established based on a fully motion characteristics analysis of the rotary sprayers. The self-rotary model revealed the influences of nozzle spatial layout on rotational speed and provided a theoretical basis for determining the attack angle. By regarding the uniformity of water jet impinging energy distribution and the sweep impinging width as evaluation criteria, a bi-objective optimization model was established. Then, the optimal spatial layouts of the nozzles were obtained via PSO algorithm, and the corresponding attack angles were derived from the self-rotary model. Finally, an actual optimization experiment was conducted using a rod-like shape 16-nozzle rotary sprayer commonly adopted in a shipyard of Zhejiang. Results show that the optimized design improves the uniformity of sweep impinging energy distribution by 22.81% and increases rust-removal efficiency by approximately 11.2%.
在本研究中,超高压柱塞泵的限制流量决定了安装在超高压水射流自驱旋转喷头上的喷嘴数量Ns。旋转喷头的基本参数特征可以通过Ns和布局模式 L 来描述。布局模式 L 由一个2×Ns的矩阵表示,其中第一行表示x坐标,第二行表示y坐标。矩阵中的每一列j(j=1,2,...,Ns )表示第j个喷嘴的位置,其定义如下:
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