基于代理模型的航空燃油泵空化性能分析

发布时间：2018-04-17 14:23

  本文选题：燃油泵 + 代理模型　； 参考：《航空学报》2016年10期

【摘要】：基于代理模型的整体敏感度分析方法,对影响燃油泵空化性能的结构参数(即诱导轮出口安放角和叶轮进口安放角)进行了分析,得到影响泵空化性能的主要因素,并对燃油泵的结构参数进行了优化。研究中,采用基于旋转修正的k-ε湍流模型及Zwart空化模型对优化前后的燃油泵空化流场进行了计算。结果表明:在一定变化范围内,叶片安放角对燃油泵的外特性影响较小,对燃油泵空化特性影响较大;其中,叶轮进口安放角对燃油泵空化性能有较大影响,随叶轮进口安放角的增大,燃油泵空化性能呈先下降后上升的变化趋势;优化后诱导轮出口安放角和叶轮进口安放角分别增大了4.4°和3.2°,满足Pareto最优解,燃油泵的空化性能较优化前提高了18%左右。
[Abstract]:Based on the overall sensitivity analysis method of the agent model, the structural parameters that affect the cavitation performance of the fuel pump are analyzed, i.e., the angle of placement at the outlet of the induction wheel and the angle of the inlet of the impeller, and the main factors affecting the cavitation performance of the pump are obtained.The structure parameters of fuel pump are optimized.In the study, the cavitation flow field of the fuel pump before and after optimization was calculated by using the k- 蔚 turbulence model based on rotation correction and the Zwart cavitation model.The results show that the blade angle has little effect on the external characteristics of the fuel pump and has a greater effect on the cavitation characteristics of the fuel pump, and the impeller inlet angle has a great effect on the cavitation performance of the fuel pump.With the increase of impeller inlet angle, the cavitation performance of fuel pump decreases first and then increases, and after optimization, the angle of inducer exit and impeller inlet increases 4.4 掳and 3.2 掳, respectively, which satisfies the Pareto optimal solution.The cavitation performance of fuel pump is improved by about 18% compared with that before optimization.
【作者单位】： 北京理工大学机械与车辆学院;中航工业集团公司南京机电液压工程研究中心;
【基金】：国家自然科学基金(51479002) 航空科学基金(2013ZC09001)~~
【分类号】：V228.1
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本文编号：1763962