冰雹连续抛射的气固耦合输运计算与试验验证

孙科; 宋江涛; 任博扬; 王欢

doi:10.13224/j.cnki.jasp.20220063

冰雹连续抛射的气固耦合输运计算与试验验证

doi: 10.13224/j.cnki.jasp.20220063

中国飞行试验研究院发动机所，西安 710089

基金项目: 工信部专项科研项目

详细信息

作者简介:
孙科（1993-），男，工程师，硕士，主要从事航空动力装置试验技术研究

中图分类号: V216.5；TB553
计量
- 文章访问数: 27
- HTML浏览量: 6
- PDF量: 14
- 被引次数: 0
出版历程
- 收稿日期: 2022-02-12
- 网络出版日期: 2024-01-27

Calculation and test verification of gas-solid coupling pneumatic transport of hail continuous ejection

Power-Plant Institute，Chinese Flight Test Establishment，Xi’an 710089，China

摘要

摘要:
针对可压缩流气力输运大尺寸颗粒的气固两相流动问题，建立了计算流体力学（CFD）与离散单元法（DEM）耦合的计算方法，通过计算流体力学计算得到抛射管内气流流场分布，离散单元法根据气动参数计算得到冰雹受力及运动情况。进行冰雹速度测量时，需在抛射管出口处加装专用测量段，对测量构型与开放构型进行对比，结果显示测量构型与开放构型下的计算结果基本一致，因此测量构型下的计算与试验可支撑连续抛雹装置设计。通过3种颗粒阻力模型下的对比计算，Ergun模型与Di模型得到的冰雹速度计算结果较大，自由流阻力模型计算得到的冰雹速度与试验测量结果最接近，其计算得到的冰雹速度与试验结果相差8.9%，对冰雹连续抛射装置设计有一定的指导作用。
- 冰雹抛射 /
- 气力输运 /
- 耦合计算 /
- 自由流阻力模型 /
- 大尺寸颗粒
Abstract:
Considering the gas-solid two-phase flow problem of compressible pneumatic transport of large particles, the coupling calculation method of computational fluid dynamics (CFD) and discrete element method (DEM) was established. The flow field distribution in the hail ejection pipe was calculated by computational fluid dynamics, while the force and motion of hail were calculated by discrete element method according to aerodynamic parameters. When measuring hail velocity, a special measurement section was required to be installed at the outlet of the ejection tube. The difference between the measurement configuration and the open configuration was then compared and calculated. The results showed that the calculation results under the measured configuration were basically consistent with those under the open configuration, so the calculation and test under the measured configuration can support the design of continuous hail throwing device. Through the comparative calculation and test verification under three particle resistance models, the hail velocity calculated by Ergun model and di model was larger, and the hail velocity calculated by free flow resistance model was closest to the test measurement results. The calculated hail velocity differs by 8.9% from the test results, playing a guiding role in the design of hail continuous ejection device.
- hail ejection /
- pneumatic transportation /
- coupled calculation /
- free flow resistance model /
- large particles

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图 1 冰雹抛射过程示意图

Figure 1. Schematic diagram of hail ejection process

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图 2 冰雹受力示意图

Figure 2. Schematic diagram of force on hail

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图 3 开放构型计算域

Figure 3. Open configuration computing domain

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图 4 测量构型计算域

Figure 4. Measurement configuration calculation domain

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图 5 气固耦合计算流程示意图

Figure 5. Schematic diagram of gas-solid coupling calculation flow

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图 6 抛雹试验设备

Figure 6. Hail throwing test equipment

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图 7 冰雹连续投放原理示意图

Figure 7. Schematic diagram of continuous hail delivery principle

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图 8 抛射管结构示意图

Figure 8. Schematic diagram of projectile tube structure

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图 9 测量通道示意图

Figure 9. Schematic diagram of measurement channel

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图 10 气流及颗粒速度分布

Figure 10. Airflow and particle velocity distribution

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图 11 测量构型下冰雹速度分布

Figure 11. Hail velocity distribution in measurement configuration

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图 12 开放构型下冰雹速度分布

Figure 12. Hail velocity distribution in open configuration

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图 13 测量构型下冰雹相体积分数分布

Figure 13. Volume fraction distribution of hail phase in measurement configuration

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图 14 测量构型下气相体积分数分布

Figure 14. Volume fraction distribution of air phase in measurement configuration

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图 15 开放构型下冰雹相体积分数分布

Figure 15. Volume fraction distribution of hail phase in open configuration

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图 16 开放构型下气相体积分数分布

Figure 16. Volume fraction distribution of air phase in open configuration

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表 1 不同阻力模型计算结果对比

Table 1. Comparison of calculation results of different resistance models

对比参数	构型	模型1	模型2	模型3
流量/（kg/s）	测量构型	0.4062	0.3878	0.3936
流量/（kg/s）	开放构型	0.4068	0.3875	0.3918
速度/（m/s）	测量构型	74.36	83.66	83.09
速度/（m/s）	开放构型	75.56	82.63	83.25

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表 2 颗粒速度测量结果

Table 2. Particle velocity measurement results

序号	冰雹速度/（m/s）	序号	冰雹速度/（m/s）
1	75.03	5	66.09
2	63.88	6	69.12
3	67.75	7	66.43
4	64.76	8	73.37

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