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论文:2015,Vol:33,Issue(2):278-283 |
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引用本文： |
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李嘉, 李华聪, 符江锋, 王淑红. 一体式航空燃油离心泵内流场数值模拟[J]. 西北工业大学学报 |
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Li Jia, Li Huacong, Fu Jiangfeng, Wang Shuhong. Numerical Simulation for the Inner Flow Field of Aero Fuel Centrifugal Pump[J]. Northwestern polytechnical university |
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| 一体式航空燃油离心泵内流场数值模拟 |
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| 李嘉1, 李华聪1, 符江锋1, 王淑红2 |
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1. 西北工业大学动力与能源学院, 陕西西安 710072;
2. 中航工业西安航空动力控制科技有限公司, 陕西西安 800077 |
| 摘要: |
| 采用多块拓扑结构和八叉树格式构建的混合网格,通过数值计算对某型诱导轮与叶轮一体式离心泵内流场性能进行了分析研究,仿真结果表明:不同计算工况下仿真数据与试验数据扬程值误差小于1%、效率值误差小于5%,即所使用的数值方法能够准确地模拟该型离心泵性能和内流场。进一步的仿真分析表明:一体式叶轮进口长度较大使得各个流量工况下离心泵叶轮内压力有明显的非对称性;隔舌处叶轮通道内压力变化最为剧烈,且在大流量工况下压力低于其它流量压力;叶片压力侧固定位置处有低速团的产生,叶片背力侧入口附近也容易产生低速流团。 |
| 关键词:
航空发动机
航空燃油离心泵
诱导轮与叶轮一体式
数值模拟
内流场
混合网格
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| Numerical Simulation for the Inner Flow Field of Aero Fuel Centrifugal Pump |
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| Li Jia1, Li Huacong1, Fu Jiangfeng1, Wang Shuhong2 |
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1. Department of Aero-Engine, Northwestern Polytechnical University, Xi'an 710072, China;
2. China Avic Xi'an Aero-Engine Controls Technology Co, Xi'an 800077, China |
| Abstract: |
| With the development of the aero engine control technique, aero fuel centrifugal pump with combination inducer and impeller meet the requirements better than the divided pump. This paper established the hybrid network of the centrifugal pump which adopted multi-block topology structure and octree format, analyzed the internal flow field performance of the pump based on numerical simulation. The simulation datas compared with test datas show that under different calculation conditions, head error of the simulation data and experimental data is less than 1%, and the efficiency value of error is less than 5%. The simulation method can accurately calculate the performance of the pump. The simulation analysis shows that the asymmetry of the impeller internal pressure is appreciable under different flow conditions because of the inlet length, under other small flow conditions. The most dramatic change is the pressure in the impeller channel, and the pressure under large flow conditions is lower than that under other flow conditions. In fixed location of the pressure side, there may produce low speed flow group, the situation is the same as in the entrance to the attachment of back pressure side. |
| Key words:
aircraft engines
centrifugal pump
combination with inducer and impeller
numerical simulation
flow fields
hybrid grid
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| 收稿日期: 2014-09-30
修回日期:
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| DOI: |
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| 作者简介: 李嘉(1989-),西北工业大学博士研究生,主要从事航空发动机控制研究。
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