摘要
为了提高消防水炮的射程,以PSKDY40型消防水炮为原型,对炮头流道结构进行多目标优化.以炮头的喉管通径、喉管长度和喉部收缩角为变量,以最小化出口湍流动能和最大化出口平均速度为目标,使用拉丁超立方设计方法进行试验设计并结合数值模拟生成RBF近似模型.利用NSGA-Ⅱ算法对炮头流道结构进行多目标优化并得到了Pareto最优解集.分析结果表明:RBF模型具有较高的拟合精度,可以提高炮头流道的优化效率;选取的3个变量中喉管通径对炮头的喷射性能影响最大;优化之后的出口湍流动能和出口速度这2个目标均优于原始模型.
In order to improve the range of fire monitor, multi-objective optimization is carried out based on PSKDY40 fire monitor. Firstly, the throat diameter, length and the contraction angle of noz- zle are selected as design variables; the lowest turbulent kinetic energy and the highest average velocity at the outlet are taken as objectives. Then, combined with optimal Latin hypercube designs and numeri- cal simulations, a RBF model is established. Finally, multi-objective optimization of the water channel in a fire monitor nozzle is performed with NSGA -Ⅱ algorithm, and the Pareto optimal solution sets are obtained. It is shown that the RBF model with high fitting accuracy can significantly improve the opti- mization efficiency for fire monitor nozzles. Moreover, the throat diameter exhibits the highest influence on fire monitor nozzle performance in the three variables. The optimized results suggest that the two ob- jectives are better than those of the original model.
出处
《排灌机械工程学报》
EI
CSCD
北大核心
2016年第7期620-625,共6页
Journal of Drainage and Irrigation Machinery Engineering
基金
国家自然科学基金资助项目(51379090
51279068)
上海市科技重点攻关项目(13231203200)
