多孔介质对风洞管道内压缩波传播的影响

周廷波; 于馨凝; 周国龙; 贾乐凡; 张家忠

doi:10.11729/syltlx20220115

多孔介质对风洞管道内压缩波传播的影响

doi: 10.11729/syltlx20220115

1.
中国空气动力研究与发展中心设备设计与测试技术研究所，绵阳　621000
2.
成都流体动力创新中心，成都　610072
3.
西安交通大学能源与动力工程学院，西安　710048

详细信息

作者简介:
周廷波：（1980—），男，贵州遵义人，硕士，高级工程师。研究方向：风洞气动设计及试验研究。通信地址：四川省绵阳市涪城区二环路南段6号（621000）。E-mail：ztb1124@sina.com

通讯作者:
E-mail：jzzhang@mail.xjtu.edu.cn

中图分类号: O354.1
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- 被引次数: 0
出版历程
- 收稿日期: 2022-11-01
- 修回日期: 2023-03-31
- 录用日期: 2023-04-17
- 刊出日期: 2023-06-25

Influences of porous media on propagation of compression wave in wind tunnel

1.
Facility Design and Instrumentation Institute, China Aerodynamics Research and Development Center, Mianyang　621000, China
2.
Chengdu Fluid Dynamics Innovation Center, Chengdu　610072, China
3.
School of energy and power engineering, Xi’an Jiaotong University, Xi’an　710048, China

摘要

摘要: 磁浮飞行风洞运行中产生的压缩波在风洞管道内传播至风洞端面后反射，可能在测试段与模型发生碰撞，干扰试验结果。为了消除压缩波对风洞试验的影响，采用在风洞管道内部铺设多孔介质的方式降低风洞内压缩波强度，依据现有的多孔介质压降模型推导管道内压缩波通过多孔介质区域压降规律方程，并根据方程内影响多孔介质消波能力的参数进行了数值模拟。结果表明：多孔介质对不同强度压缩波均有相似比例的压降作用，其消波能力随压缩波强度、多孔介质惯性阻力系数及厚度的增大而增大；但当多孔介质惯性阻力系数及厚度增大时，部分压缩波不能通过多孔介质而是被其反射，反射压缩波强度也随惯性阻力系数及厚度的增大而增大。增加层数可以在不改变多孔介质其他参数的情况下降低反射压缩波强度，提高多孔介质的总体消波能力；多孔介质可以在较宽的环境压力（0.0001～1 atm）内保持良好的消波能力。
- 压缩波 /
- 多孔介质 /
- 磁浮飞行风洞
Abstract: Generated during the operation of the maglev flight tunnel and reflected at the end of the tunnel, the compression wave may collide with the model at the test section and interfere with the test results. In order to attenuate the influence of compression wave during the tunnel test, the method of laying porous media inside the tunnel pipe is used to reduce the intensity of the compression wave. According to the existing porous media pressure drop equation, the equations describing the compressional wave pressure drop law through porous media in the tunnel pipe were derived. The parameters on which the wave elimination ability of porous media in the equation depend were analyzed by numerical simulation. The results show that the porous media has the same proportion of the pressure drop effect on the compression wave within different strengths. Its wave elimination ability increases with the increase of the compression wave strength, inertial resistance coefficient and porous media thickness. However, with the increase of the inertial resistance coefficient and thickness, a part of the compression wave is reflected instead of passing through the porous media. The strength of the reflected compressional wave also increases with the increase of the inertial resistance coefficient and thickness. Dividing the porous media into multiple layers can reduce the strength of the reflected compressional wave while other parameters of the porous media remain unchanged, so as to improve the overall wave elimination ability of the porous media. Porous media could maintain favourable wave elimination ability under a wide range of ambient pressure changes (0.0001-1 atm).
- compression wave /
- porous media /
- maglev flight tunnel

HTML全文

图 1 几何模型

Figure 1. Geometric model

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图 2 网格划分

Figure 2. Grid division

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图 3 网格无关性分析

Figure 3. Grid independence test

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图 4 不同压缩波强度下多孔介质消波性能

Figure 4. Wave attenuation performance of porous media with different compressional wave strengths

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图 5 不同强度压缩波通过多孔介质的压降

Figure 5. Pressure drop of compressional wave passing through porous media with different strengths

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图 6 不同强度压缩波通过多孔介质的压降百分比

Figure 6. Pressure drop（percentage） of compressional wave passing through porous media with different strengths

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图 7 不同惯性阻力系数下多孔介质消波性能

Figure 7. Wave attenuation performance of porous media with different C₂

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图 8 不同厚度多孔介质的消波性能

Figure 8. Wave attenuation performance of porous media with different thickness

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图 9 不同层数多孔介质的消波性能

Figure 9. Wave attenuation performance of porous media with different layers

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图 10 不同环境压力时多孔介质的消波性能

Figure 10. Wave attenuation performance of porous media with different ambient pressure

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图 11 环境压力0.0001 atm时多孔介质的消波性能

Figure 11. Wave attenuation performance of porous media at 0.0001 atm

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