航天推进技术研究院主办
[1]项乐,李春乐,许开富,等.诱导轮液氧空化流动特性数值仿真[J].火箭推进,2024,50(03):11-18.[doi:10.3969/j.issn.1672-9374.2024.03.002]
XIANG Le,LI Chunle,XU Kaifu,et al.Numerical simulation on LOX cavitating flow characteristics of inducer[J].Journal of Rocket Propulsion,2024,50(03):11-18.[doi:10.3969/j.issn.1672-9374.2024.03.002]
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XIANG Le,LI Chunle,XU Kaifu,et al.Numerical simulation on LOX cavitating flow characteristics of inducer[J].Journal of Rocket Propulsion,2024,50(03):11-18.[doi:10.3969/j.issn.1672-9374.2024.03.002]
诱导轮液氧空化流动特性数值仿真
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
50
期数:
2024年03期
页码:
11-18
栏目:
目次
出版日期:
2024-06-25
- Title:
- Numerical simulation on LOX cavitating flow characteristics of inducer
- 文章编号:
- 1672-9374(2024)03-0011-08
- Keywords:
- inducer; LOX cavitation; numerical simulation; cavitation model; thermal effect
- 分类号:
- TV131.32; V431
- 文献标志码:
- A
- 摘要:
- 诱导轮是决定涡轮泵抗空化能力的关键部件,为了揭示诱导轮内部液氧空化流动特性,建立了基于能量方程源项修正的低温空化数值计算方法,同时耦合了液氧物性随温度变化关系,利用经典低温空化和诱导轮空化试验数据进行了充分验证,对某三叶片诱导轮内部液氧空化流动进行了仿真分析。结果表明:低温介质空化过程中与周围液体存在剧烈的能量交换,但只有一部分空化溃灭释放的热量被传递至周围流场,通过调节能量方程源项中空化溃灭释热比例可使空化区尾部温度场预测精度提升0.5%。对比等温计算,考虑热效应后,液氧空化区范围和内部汽相体积分数大幅减小,对流道的阻塞程度降低,有效延缓了诱导轮扬程断裂。对3种温度下液氧空化流动进行仿真研究,发现液氧温度越高,空化范围越小,同时空化区温降越大,诱导轮空化性能改善也越显著。
- Abstract:
- Inducer is key component which determinates the anti-cavitation ability of a turbopump. In order to clarify the LOX cavitation flow characteristic inside the inducer, a novel numerical simulation for cryogenic cavitation method has been built based on the correction of energy equation source term, and the relationship between physical properties and temperature variation is coupled. The numerical method has been verified by the classical cryogenic cavitation and the inducer cavitation experimental data. Then, a simulation analysis of cavitation flow inside a three-bladed inducer are conducted, and it is found that: there is strong energy exchange between cavities and the surrounding liquid during the cryogenic cavitation, but only part of the heat released by the cavitation collapse can be transferred to the surrounding liquid. By adjusting the heat release ratio of heat by cavitation collapse in the source term of energy equation, the prediction precision of temperature field near the cavity rear can be improved by 0.5%. Compared with isothermal calculation results, the LOX cavitation area and vapor volume fraction decrease remarkably when the thermal effect is considered, thus the blocking effect to the blade channels decreases either, and the inducer head breakdown is delayed effectively. The simulation study of the LOX cavitation flow at different temperature shows that the higher the liquid oxygen temperature, the smaller the cavitation range, and the larger the temperature drop in the cavitation region, the more significant the improvement of cavitation performance for the induced wheel.
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备注/Memo
收稿日期:2023- 11- 20修回日期:2024- 03- 12
基金项目:国家重大基础研究项目(613321)
作者简介:项乐(1991—),男,博士,研究领域为涡轮泵设计。
更新日期/Last Update:
1900-01-01