Experimental Research on Pressure Drop Characteristics of Flow Damper in Advanced Accumulator
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摘要: 通过开展先进安注箱阻尼器压降特性实验，获得了阻尼器两种不同形式的压降特性，研究了不同几何参数对压降系数的影响规律，并且拟合了压降系数关系式。结果表明：在实验参数范围内，漩涡压降系数随雷诺数增加而逐渐增大，交混压降系数随大/小管流量比的增加，先快速减小而后缓慢增加。小管宽度和阻尼器直径对漩涡压降系数有一定程度影响，大小管夹角、阻尼器直径和大管宽度对交混压降系数有影响，小管宽度对交混压降系数影响不明显。漩涡压降系数关系式预测值与实验值偏差在±10%以内，交混压降系数关系式预测值与实验值偏差较大。Abstract: Two different types of pressure drop characteristics of flow damper were obtained through the test of pressure drop characteristics of flow damper in advanced accumulator. The influence law of different geometric parameters on the pressure drop coefficient is studied, and the relationship of pressure drop coefficient is fitted. The results show that in the range of experimental parameters, the vortex pressure drop coefficient increases gradually with the increase of Reynolds number, and the mixing pressure drop coefficient decreases rapidly and then increases slowly with the increase of the flow ratio of large tube to small tube. The small tube width and flow damper diameter have a certain influence on the vortex pressure drop coefficient. The inclination of large and small tubes, the flow damper diameter and the large tube width have an effect on the mixing pressure drop coefficient, while the small tube width has no obvious effect on the mixing pressure drop coefficient. The deviation between the predicted value of the vortex pressure drop coefficient relationship and the experimental value is within ±10%, and the deviation between the predicted value of the mixing pressure drop coefficient relationship and the experimental value is large.
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Key words:
- Flow damper /
- Pressure drop characteristic /
- Experimental research
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图 3 漩涡压降系数随入口雷诺数的变化曲线
Figure 3. Variation Curve of Vortex Pressure Drop Coefficient with Inlet Reynolds Number
图 4 不同小管宽度对漩涡压降系数的影响（ D =780 mm）
Figure 4. Influence of Different Small Tube Widths on Vortex Pressure Drop Coefficient（ D =780 mm）
图 5 不同阻尼器直径对漩涡压降系数的影响（ b =45 mm）
Figure 5. Influence of Different Flow Damper Diameters on Vortex Pressure Drop Coefficient (b =45 mm)
图 6 漩涡压降系数关系式预测值与实验值对比
Figure 6. Comparison between Predicted Value and Experimental Value of Vortex Pressure Drop Coefficient Relationship
图 7 交混压降系数随出口管雷诺数的变化曲线
Figure 7. Variation Curve of Mixing Pressure Drop Coefficient with Reynolds number of Outlet Pipe
图 8 不同大小管夹角对交混压降特性的影响规律
Figure 8. Influence Law of Different Large/Small Tube Inclination on Mixing Pressure Drop Characteristics
图 9 不同阻尼器直径对交混压降特性的影响规律
Figure 9. Influence Law of Different Flow Damper Diameters on Mixing Pressure Drop Characteristics
图 10 不同大管宽度对交混压降特性的影响规律
Figure 10. Influence Law of Different Large Tube Widths on Mixing Pressure Drop Characteristics
图 11 不同小管宽度对交混压降特性的影响规律
Figure 11. Influence Law of Different Small Tube Widths on Mixing Pressure Drop Characteristics
图 12 交混压降系数关系式预测值与实验值对比
Figure 12. Comparison between Predicted Value and Experimental Value of Mixing Pressure Drop Coefficient Relationship
表 1 阻尼器本体几何参数表
Table 1. Geometrical Parameters of Flow Damper Body
名称 数值 漩涡室直径D/mm 600、780、900 小管宽度b/mm 40、45、50 大管宽度B/mm 100、165、200 大小管夹角θ 90°、110°、130° 小管与切线夹角Φ 0° 大管与切线夹角Ψ 180°−θ 出口管内径d/mm 90 
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表 2 实验参数的不确定度
Table 2. Uncertainty of Experimental Parameters
名称 不确定度 温度/℃ 0.47 压力/kPa 9.225 流量/% 0.55 $\xi $/% 2.6
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