基于局部射流提升粒子分离器分砂性能的方法

程飞; 孙姝; 谢买祥; 张悦; 谭慧俊

doi:10.13224/j.cnki.jasp.20210549

基于局部射流提升粒子分离器分砂性能的方法

doi: 10.13224/j.cnki.jasp.20210549

程飞^1,,
孙姝²,
谢买祥³,
张悦¹,
谭慧俊^1,*, ,

1.
南京航空航天大学能源与动力学院，南京 210016
2.
南京航空航天大学民航/飞行学院，南京 210016
3.
中国航发湖南动力机械研究所，湖南株洲 412002

基金项目: 国家自然科学基金（51806102，51906104，12025202，U20A2070，11772156）；国家科技重大专项（J2019-Ⅱ-0014-0035）

详细信息

作者简介:
程飞（1996-），男，硕士生，主要从事内流气体动力学研究

通讯作者:
谭慧俊（1975-），男，教授、博士生导师，博士，主要从事内流气体动力学研究。E-mail：thj@263.net

中图分类号: V211.48
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- 被引次数: 0
出版历程
- 收稿日期: 2021-09-27
- 网络出版日期: 2023-03-04

Method of improving sand separation performance of particle separator based on local jet

CHENG Fei^1
,,
SUN Shu²,
XIE Maixiang³,
ZHANG Yue¹,
TAN Huijun^{1,*
, ,}

1.
College of Energy and Power， Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China
2.
Civil Aviation/Flight Academy， Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China
3.
Hunan Aviation Powerplant Research Institute， Aero Engine Corporation of China，Zhuzhou Hunan 412002，China

摘要

摘要:
针对整体式惯性粒子分离器对小粒径砂尘分离效率低下的问题，提出了一种通过引入局部射流形成气动鼓包，以提升粒子分离器对小粒径砂尘分离效率的方法，并通过仿真验证了该方法的有效性。研究发现：气动鼓包的形成对小粒径砂尘的分离效率提升明显，在出口总压恢复下降不超过0.5%的前提下能将AC砂的分离效率提高3.6%，最高可提升7%；引入射流能有效提升粒径在9 μm及以下砂尘的分离效率，并且，砂尘粒径越小，其提升效果也越低，对于9 μm粒径砂尘，可将其分离效率提升至100%；射流引入位置应设置在中心体鼓包壁面上，且在一定范围内，射流角度与来流夹角越大、射流压强越大，对小粒径砂尘分离效率的提升效果也就越高。
- 分离效率 /
- 粒子分离器 /
- 气动鼓包 /
- 气固两相流 /
- 小粒径砂尘
Abstract:
In view of the problem that the inertial particle separator has low separation efficiency of sands with small diameter sand, a method was proposed to improve the small diameter sand separation efficiency by introducing local jet to form pneumatic bulge, and the effectiveness of the method was verified by simulation. Results showed that, the formation of pneumatic bulge can significantly improve the small diameter sand separation efficiency, and the separation efficiency of AC sands can be increased by 3.6%, or up to 7%, under the premise that the total pressure recovery at the outlet was no more than 0.5%; the introduction of jet can effectively improve the separation efficiency of sands with diameter of 9 μm and below, and the smaller diameter indicated the lower lifting effect. For sands with diameter of 9 μm, the separation efficiency can be increased to 100%; the injection position of the jet should be set on the wall surface of the centrosome bulge, and within a certain range, the greater angle between the jet and incoming flow and the greater jet pressure indicated the higher improvement effect on the small diameter sand separation efficiency.
- separation efficiency /
- particle separator /
- pneumatic bulge /
- gas-solid two-phase flow /
- small diameter sand

HTML

图 1 模型尺寸

Figure 1. Model size

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图 2 网格分布

Figure 2. Grid division

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图 3 砂尘粒径分布规律曲线

Figure 3. Regular curve of sand and dust particle size distribution

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图 4 沿程静压对比

Figure 4. Static pressure comparison along the way

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图 5 初始流场特性

Figure 5. Characteristics of initial flow field

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图 6 初始流场的AC砂运动轨迹

Figure 6. Tracks of AC sands in initial flow field

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图 7 初始流场的C砂运动轨迹

Figure 7. Tracks of C sands in initial flow field

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图 8 引入射流后的流场特性

Figure 8. Characteristics of flow field with jet

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图 9 引入射流前后的小粒径砂尘运动轨迹

Figure 9. Tracks of small diameter sands before and after the introduction of jet

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图 10 引入射流前后的小粒径砂尘分离效率

Figure 10. Separation efficiencies of small diameter sands before and after the introduction of jet

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图 11 射流位置

Figure 11. Positions of jet

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图 12 射流引入位置对砂尘轨迹的影响

Figure 12. Effect of jet introduction position on sand and dust trajectory

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图 13 4种射流引入角度

Figure 13. Four jet introduction angles

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图 14 射流引入角度对砂尘轨迹的影响

Figure 14. Effect of jet introduction angle on sand and dust trajectory

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图 15 射流压力对砂尘轨迹的影响

Figure 15. Effect of jet pressure on sand and dust trajectories

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表 1 性能参数

Table 1. Performance parameter

参数	定义
清除比β	$\,\beta = { {q} }_{ m,{\rm{s}}} / q_{ m ,{\rm{c}}}$
主流出口总压恢复系数σ	$\sigma ={ { p_{ {\rm{c} } } ^ * } }/{ { {p_0} } }$
砂尘分离效率η	$\eta = {m_{{\rm{s}}} }/ （{m_{\rm{c}}} + {m_{{\rm{s}}} }） \times100\text{%}$

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表 2 气动参数对比

Table 2. Comparison of aerodynamic parameters

参数	试验	CFD
q_m,c/（kg/s）	2.268	2.268
β	0.179	0.179
σ	0.991	0.992

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表 3 AC砂分离效率对比

Table 3. Comparison of AC sand separation efficiency

参数	试验	CFD
q_m,c/（kg/s）	2.268	2.268
β	0.156	0.156
η/%	77.7	77.9

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表 4 C砂分离效率对比

Table 4. Comparison of C sand separation efficiency

参数	试验	CFD
q_m,c/（kg/s）	2.268	2.268
β	0.167	0.167
η/%	91.4	96.7

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表 5 射流引入位置对分离器性能参数的影响

Table 5. Effect on separator performance of different jet positions

参数	无射流	a位置	b位置	c位置
η_{9 μm}/%	63.79	97.14	100	93.71
η_ac/%	81.74	83.31	84.59	82.45
σ	0.993	0.995	0.990	0.991
q_m,j/q_m,c	0	0.041	0.041	0.042

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表 6 射流角度对分离器性能参数的影响

Table 6. Effect on separator performance of different jet angles

参数	θ₁	θ₂	θ₃	θ₄
η_{9 μm}/%	77.14	100	100	100
η_ac/%	81.97	84.59	87.73	88.22
σ	0.992	0.990	0.987	0.985
q_m,j/q_m,c	0.044	0.041	0.042	0.039

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表 7 射流压力对分离器性能参数的影响

Table 7. Effect on performance of separator with different jet pressures

参数	p₀	p₁	p₂	p₃
η_{9 μm}/%	93	100	100	100
η_ac/%	82.44	85.31	87.73	88.71
σ	0.990	0.988	0.987	0.986
q_m,j/q_m,c	0.018	0.033	0.042	0.049

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