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论文:2022,Vol:40,Issue(1):199-205 |
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引用本文： |
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李嘉, 李华聪, 张伟, 王玥, 李柯柯, 王淑红. 高压燃油离心泵压力脉动及非定常流动分析[J]. 西北工业大学学报 |
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LI Jia, LI Huacong, ZHANG Wei, WANG Yue, LI Keke, WANG Shuhong. Transient flow structures and pressure pulsations of a high-pressure aero-fuel centrifugal pump[J]. Northwestern polytechnical university |
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| 高压燃油离心泵压力脉动及非定常流动分析 |
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| 李嘉1, 李华聪2, 张伟3, 王玥4, 李柯柯4, 王淑红4 |
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1. 长安大学 工程机械学院, 陕西 西安 710064;
2. 西北工业大学 动力与能源学院, 陕西 西安 710072;
3. 陕西空天动力研究院有限公司, 陕西 西安 710000;
4. 中国航发西安动力控制科技有限公司, 陕西 西安 710077 |
| 摘要: |
| 为了掌握全工作包线内高压燃油离心泵的非定常流动特性，对高压航空燃油离心泵进行了数值模拟并分析其内部的压力脉动及非定常流动变化。将仿真预测结果与泵的性能试验结果进行对比，验证了所采用的仿真方法的有效性；对泵内关键位置的压力进行监测，并利用快速傅里叶变化完成压力脉动的时频特性分析；重点以相对速度、湍动能等为指标，分析泵内非定常流动结构的变化。结果表明：设计流量工况下叶轮流道内压力脉动主频为转频fn，蜗壳流道内压力脉动主频为叶频fb，不同的监测点均呈现出相似的脉动变化规律。设计流量工况下泵内整体流动相对平稳，但小流量工况下叶轮流道内出现了一定的漩涡流动，主要存在于靠近隔舌区域的叶轮流道出口位置。此外，叶轮出口及隔舌区域的湍动能分布范围较大且变化强烈，此处存在一定的水力损失。 |
| 关键词:
燃油离心泵
非定常特性
压力脉动
流动结构
湍动能
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| Transient flow structures and pressure pulsations of a high-pressure aero-fuel centrifugal pump |
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| LI Jia1, LI Huacong2, ZHANG Wei3, WANG Yue4, LI Keke4, WANG Shuhong4 |
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1. School of Construction Machinery, Chang'an University, Xi'an 710064, China;
2. School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China;
3. Shaanxi Aerospace and Astronautics Propulsion Research Institute, Xi'an 710000, China;
4. China AVIC Xi'an Aero-Engine Controls Technology Co., Ltd, Xi'an 710077, China |
| Abstract: |
| In order to study the complex transient flow characteristics of a high-pressure aero-fuel centrifugal pump within its full working envelope, a certain type of centrifugal pump is numerically simulated, in which the simulation results are compared with the experiment results to verify the effectiveness of the present simulation method. Then, the verified simulation method is selected to analyze the transient flow characteristics, in which the time-frequency characteristic of pressure pulsation at monitored positions is analyzed by using fast fourier transform. In addition, the unsteady flow structures are studied by focusing on the relative speed, turbulent kinetic energy and so on. The results show that the main frequency of pressure pulsation in the impeller and volute is rotation frequency and blade frequency, respectively, where different monitoring points show similar trend. Meanwhile, the flow is relatively stable under design flow rate condition. However, a certain large-scale vortex appears in the impeller channel under small flow rate conditions, which mainly exists at the exit of the impeller channel near the tongue. In addition, turbulent kinetic energy at the exit of the impeller and the tongue has a large distribution range and changes seriously, where a certain hydraulic loss is produced. |
| Key words:
aero-fuel centrifugal pump
transient flow characteristic
pressure pulsation
flow structure
turbulence kinetic energy
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| 收稿日期: 2021-03-21
修回日期:
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| DOI: 10.1051/jnwpu/20224010199 |
| 基金项目: 陕西省自然科学基金青年项目（2020JQ-335）、中央高校基金（300102259101）与国家重大科技专项（2017-V-0013-0065）资助 |
| 通讯作者:
Email： |
| 作者简介: 李嘉(1989—),长安大学副教授,主要从事离心泵、离心压气机性能与可靠性一体设计研究。e-mail:lijia89626@163.com
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| 相关功能 |
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| 作者相关文章 |
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| 李嘉 在本刊中的所有文章 |
| 李华聪 在本刊中的所有文章 |
| 张伟 在本刊中的所有文章 |
| 王玥 在本刊中的所有文章 |
| 李柯柯 在本刊中的所有文章 |
| 王淑红 在本刊中的所有文章 |
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