| 引用本文: | 韩启龙,马洋.喷嘴结构对高压水射流影响及结构参数优化设计.[J].国防科技大学学报,2016,38(3):68-74.[点击复制] |
| HAN Qilong,MA Yang.Influence of nozzle structure on high pressure water jet and optimization design of nozzle structure parameter[J].Journal of National University of Defense Technology,2016,38(3):68-74[点击复制] |
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| 喷嘴结构对高压水射流影响及结构参数优化设计 |
| 韩启龙, 马洋 |
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(第二炮兵工程大学 动力工程系， 陕西 西安 710025)
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| 摘要: |
| 喷嘴是产生高压水射流的关键部件，其结构形式对射流动力学性能有很大影响。以圆柱形喷嘴为对象，进行喷嘴结构对高压水射流的影响分析及结构参数优化设计。采用两相流计算流体力学模型进行喷嘴内外的射流流场分析。为节省计算资源，在优化设计时引入Kriging代理模型替代计算流体力学模型。分别采用改进的非劣分类遗传算法和基于分解的多目标进化算法进行单目标和多目标优化设计。研究结果表明：直线型喷嘴总体性能较优，凹型喷嘴的次之，凸型喷嘴性能最差。以直线型喷嘴为设计对象，以射流初始段长度和流量为目标，得到了单目标和多目标优化设计结果。单目标优化时，两个指标较基准外形分别提高14.71%和27.56%。多目标优化时，优化得到的半锥角处于［15.4°, 89.8° ］区间内。运用代理模型和进化算法的全局优化方法在进行喷嘴的优化设计时是有效的。 |
| 关键词: 高压水射流 喷嘴 全局优化 两相流 代理模型 基于分解的多目标进化算法 |
| DOI：10.11887/j.cn.201603012 |
| 投稿日期：2015-11-20 |
| 基金项目:国家自然科学基金青年科学基金资助项目（E031303）；第二炮兵工程大学青年基金资助项目（2015QNJJ034） |
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| Influence of nozzle structure on high pressure water jet and optimization design of nozzle structure parameter |
| HAN Qilong, MA Yang |
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(Department of Power Engineering, The Second Artillery Engineering University, Xi′an 710025, China)
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| Abstract: |
| Nozzle is the crucial component used to generate high pressure water jet, and its structure form has large influence on dynamic performance of high pressure water jet. So the influence of nozzle structure on high pressure water jet was analyzed, and the optimization design of nozzle structure parameter was implemented. A two-phase flow computational fluid dynamics model was employed to analyze the flow field. 〖HJ*2〗The Kriging surrogate model was used to replace the computational fluid dynamics model in the process of optimization design for reducing the computational resources. The nondominated sorting genetic algorithm and multiobjective evolutionary algorithms based on decomposition were respectively employed to carry out single and multi objective optimization design. The research results show that the general capability of line form nozzle is the best, the concavity-form nozzle is in the middle, and the protruding form nozzle has the worst capability. The single and multi objective optimization design of line form nozzle is implemented, in which the core zone length and the mass flux of water jet are taken as optimization objectives. Compared with the baseline, the two indexes increased by 14.71% and 27.56% respectively after the single objective optimization. The optimal semi-cone angle after multi objective optimization located on ［15.4°， 89.8 °］. The global optimization algorithm based on surrogate model and evolutionary algorithm is proved to be effective. |
| Keywords: high pressure water jet nozzle global optimization two phase flow surrogate model multiobjective evolutionary algorithms based on decomposition |
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