亚声速斜冲击喷流噪声控制技术试验研究

陈保; 李伟鹏; 吴飞; 羌晓青

doi:10.13224/j.cnki.jasp.20230035

亚声速斜冲击喷流噪声控制技术试验研究

doi: 10.13224/j.cnki.jasp.20230035

1.
上海交通大学航空航天学院，上海 200240
2.
中国航发沈阳发动机研究所，沈阳 110015

详细信息

作者简介:
陈保（1995-），男，博士生，主要从事喷流噪声研究

中图分类号: V211.7
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- 被引次数: 0
出版历程
- 收稿日期: 2023-01-15
- 网络出版日期: 2025-03-25

Experimental study on noise suppression technology of subsonic inclined impinging jet

1.
School of Aeronautics and Astronautics，Shanghai Jiao Tong University，Shanghai 200240，China
2.
Shenyang Engine Research Institute，Aero Engine Corporation of China，Shenyang 110015，China

摘要

摘要:
舰载机起飞过程中，发动机喷流冲击偏流板产生高强度噪声，危害了甲板人员听觉健康和设备结构安全。通过施加锯齿喷口和微结构冲击板，在亚声速喷流斜冲击试验条件下，研究了两种降噪措施对冲击喷流噪声的控制作用，分析了锯齿齿数、内切角和齿长对冲击喷流噪声特性的影响规律，探索研究了三角顺流沟槽、金字塔凸起、内嵌圆孔、三角横流沟槽这4种微结构冲击板对冲击喷流噪声指向性及强度的影响，考察了锯齿喷口与微结构冲击板之间的降噪叠加效应。研究结果表明：锯齿喷口有效地抑制了冲击喷流噪声，增大内切角可以提高降噪水平；微结构冲击板可以降低低频段噪声，其中三角横流沟槽板具有最好的抑制效果，在下游的总声压级最大降噪量达3.68 dB；组合降噪方案对下游噪声控制显著，且呈现出一定的非线性叠加机制。研究结论对于抑制舰载机冲击喷流噪声具有工程指导价值。
- 冲击喷流噪声 /
- 亚声速喷流 /
- 锯齿喷口 /
- 微结构冲击板 /
- 噪声控制
Abstract:
During taking off of carrier-based aircraft, the engine exhaust impinged on the jet blast deflector generates high-intensity noise, which endangers the hearing health of deck staff and the safety of equipment structure. Under the circumstance of subsonic cold jet impinging on a inclined plate, by taking advantage of chevron nozzles and micro structured inclined plates, the suppression effects of two noise suppression strategies on impinging jet noise were studied. The effects of the chevron nozzles on impinging jet noise characteristics, such as chevron number, chevron penetration and chevron length, were analyzed carefully. The effects on the directivity and intensity of impinging jet noise of the micro structured impinged plates, such as triangular streamwise grooves, pyramid bulges, embedded circular holes, and triangular crossing grooves, were explored. Investigation was carried out to assess the noise-suppressing superposition effects of multiple suppression strategies, which consisted of chevron nozzles and micro structured inclined plates. The experimental results showed that chevron nozzles efficiently suppressed impinging jet noise, and increasing chevron penetration can further improve the ability of noise reduction. Micro structured impinged plates can reduce noise in the low frequencies, and the triangular crossing groove plate had the best suppression effect, achieving a maximum reduction in the overall sound pressure levels of up to 3.68 dB at the downstream. The combined strategies of noise reduction significantly suppressed downstream noise levels, manifesting a distinct nonlinear superposition mechanism. The study conclusions had engineering guiding significance for suppressing impinging jet noise of carrier-based aircraft.
- impinging jet noise /
- subsonic jet /
- chevron nozzles /
- micro structured impinged plates /
- noise suppression

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图 1 试验环境测试现场

Figure 1. Experimental test site

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图 2 喷流斜冲击试验台

Figure 2. Experimental set-up of inclined jet impingement

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图 3 微结构冲击板模型

Figure 3. Experimental model of micro structured impinged plate

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图 4 远场噪声采集水平示意图

Figure 4. Horizontal schematic diagram of far-field noise measurement

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图 5 锯齿齿数对远场总声压级的影响

Figure 5. Effects of chevron number on the far-field OASPL

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图 6 锯齿齿数对远场噪声频谱的影响（θ=140°）

Figure 6. Effects of chevron number on far-field noise spectrum （θ=140°）

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图 7 锯齿内切角对远场总声压级的影响

Figure 7. Effects of chevron penetration on the far-field OASPL

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图 8 锯齿内切角对远场噪声频谱的影响（θ=140°）

Figure 8. Effects of chevron penetration on far-field noise spectrum （θ=140°）

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图 9 锯齿长度对声压级的影响

Figure 9. Effects of chevron length on the SPL

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图 10 微结构冲击板对远场总声压级的影响

Figure 10. Effects of micro structured impinged plate on the far-field OASPL

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图 11 微结构冲击板对远场噪声频谱的影响（θ=140°）

Figure 11. Effects of micro structured impinged plate on the far-field noise spectrum （θ=140°）

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图 12 组合降噪措施对远场总声压级的影响

Figure 12. Effects of multiple suppression strategy on the far-field OASPL

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图 13 组合降噪措施对远场噪声频谱的影响（θ=140°）

Figure 13. Effects of multiple suppression strategy on far-field noise spectrum （θ=140°）

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表 1 锯齿喷口参数列表

Table 1. Parameters of chevron nozzles

试验编号	齿数N	齿长L	内切角β/（°）
CN8-2D-0	8	0.2D	0
CN12-2D-0	12	0.2D	0
CN16-2D-0	16	0.2D	0
CN20-2D-0	20	0.2D	0
CN12-2D-4	12	0.2D	4
CN12-2D-8	12	0.2D	8
CN12-1D-0	12	0.1D	0
CN12-3D-0	12	0.3D	0

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表 2 微结构冲击板参数列表

Table 2. Parameters of micro structured impinged plate

试验编号	微结构类型	特征尺度L_w/mm
T-5	三角顺流沟槽	5
T-7	三角顺流沟槽	7
T-9	三角顺流沟槽	9
P-5	金字塔凸起	5
P-7	金字塔凸起	7
P-9	金字塔凸起	9
H-5	内嵌圆孔	5
H-7	内嵌圆孔	7
H-9	内嵌圆孔	9
T-cross-5	三角横流沟槽	5
T-cross-7	三角横流沟槽	7
T-cross-9	三角横流沟槽	9

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