Influence of Surface Roughness on a Highly Loaded Axial Compressor Stage Performance at Low Reynolds Number
In the present study, a numerical simulation was conducted to investigate the influence of surface roughness on the aerodynamic performance of a 1.5-stage highly loaded axial compressor at low Reynolds number. It was especially considered how the roughness Reynolds number (k+) affected the change of...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/1208492 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832561366511124480 |
|---|---|
| author | Hongzhi Cheng Mingyang Wang Chuangxin Zhou Shengfeng Zhao Xingen Lu Junqiang Zhu |
| author_facet | Hongzhi Cheng Mingyang Wang Chuangxin Zhou Shengfeng Zhao Xingen Lu Junqiang Zhu |
| author_sort | Hongzhi Cheng |
| collection | DOAJ |
| description | In the present study, a numerical simulation was conducted to investigate the influence of surface roughness on the aerodynamic performance of a 1.5-stage highly loaded axial compressor at low Reynolds number. It was especially considered how the roughness Reynolds number (k+) affected the change of the inlet and outlet conditions, the growth of the separation bubble (LSB), the status of the limiting streamline, and the patterns of the wake. Regarding the roughness settings, five roughness magnitudes and four roughness locations were mainly studied. The results showed that at low Re, surface roughness mainly improved the stage performance by reducing the length and width of the LSB as well as the rotor tip vorticity, delaying the occurrence of three-dimensional flow separation and increasing the turbulence level near the wall. However, it also aggravated the incoordination between the subsequent stages to a certain extent, which limited further improvement of the overall aerodynamic performance. Generally, with k+ increasing, the compressor aerodynamic performance improved and achieved the best at k+=137.8. The maximum increases in the total pressure ratio, peak efficiency, and chocked mass flow were approximately 4.01%, 5.34%, and 2.24%, respectively. In addition, for all the four roughness locations, the roughness covering from the leading edge to 50% of the axial chord length on the suction surface had a relatively evident advantage in improving the compressor peak efficiency because of the better control of the LSB and wall shear stress. |
| format | Article |
| id | doaj-art-7ec9d4859586463f90bbb376ae1a621c |
| institution | Kabale University |
| issn | 1687-5966 1687-5974 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-7ec9d4859586463f90bbb376ae1a621c2025-02-03T01:25:11ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742021-01-01202110.1155/2021/12084921208492Influence of Surface Roughness on a Highly Loaded Axial Compressor Stage Performance at Low Reynolds NumberHongzhi Cheng0Mingyang Wang1Chuangxin Zhou2Shengfeng Zhao3Xingen Lu4Junqiang Zhu5Key Laboratory of Light-Duty Gas-Turbine, Institute of Engineering Thermo-Physics, Chinese Academy of Sciences, Beijing, ChinaKey Laboratory of Light-Duty Gas-Turbine, Institute of Engineering Thermo-Physics, Chinese Academy of Sciences, Beijing, ChinaKey Laboratory of Light-Duty Gas-Turbine, Institute of Engineering Thermo-Physics, Chinese Academy of Sciences, Beijing, ChinaKey Laboratory of Light-Duty Gas-Turbine, Institute of Engineering Thermo-Physics, Chinese Academy of Sciences, Beijing, ChinaKey Laboratory of Light-Duty Gas-Turbine, Institute of Engineering Thermo-Physics, Chinese Academy of Sciences, Beijing, ChinaKey Laboratory of Light-Duty Gas-Turbine, Institute of Engineering Thermo-Physics, Chinese Academy of Sciences, Beijing, ChinaIn the present study, a numerical simulation was conducted to investigate the influence of surface roughness on the aerodynamic performance of a 1.5-stage highly loaded axial compressor at low Reynolds number. It was especially considered how the roughness Reynolds number (k+) affected the change of the inlet and outlet conditions, the growth of the separation bubble (LSB), the status of the limiting streamline, and the patterns of the wake. Regarding the roughness settings, five roughness magnitudes and four roughness locations were mainly studied. The results showed that at low Re, surface roughness mainly improved the stage performance by reducing the length and width of the LSB as well as the rotor tip vorticity, delaying the occurrence of three-dimensional flow separation and increasing the turbulence level near the wall. However, it also aggravated the incoordination between the subsequent stages to a certain extent, which limited further improvement of the overall aerodynamic performance. Generally, with k+ increasing, the compressor aerodynamic performance improved and achieved the best at k+=137.8. The maximum increases in the total pressure ratio, peak efficiency, and chocked mass flow were approximately 4.01%, 5.34%, and 2.24%, respectively. In addition, for all the four roughness locations, the roughness covering from the leading edge to 50% of the axial chord length on the suction surface had a relatively evident advantage in improving the compressor peak efficiency because of the better control of the LSB and wall shear stress.http://dx.doi.org/10.1155/2021/1208492 |
| spellingShingle | Hongzhi Cheng Mingyang Wang Chuangxin Zhou Shengfeng Zhao Xingen Lu Junqiang Zhu Influence of Surface Roughness on a Highly Loaded Axial Compressor Stage Performance at Low Reynolds Number International Journal of Aerospace Engineering |
| title | Influence of Surface Roughness on a Highly Loaded Axial Compressor Stage Performance at Low Reynolds Number |
| title_full | Influence of Surface Roughness on a Highly Loaded Axial Compressor Stage Performance at Low Reynolds Number |
| title_fullStr | Influence of Surface Roughness on a Highly Loaded Axial Compressor Stage Performance at Low Reynolds Number |
| title_full_unstemmed | Influence of Surface Roughness on a Highly Loaded Axial Compressor Stage Performance at Low Reynolds Number |
| title_short | Influence of Surface Roughness on a Highly Loaded Axial Compressor Stage Performance at Low Reynolds Number |
| title_sort | influence of surface roughness on a highly loaded axial compressor stage performance at low reynolds number |
| url | http://dx.doi.org/10.1155/2021/1208492 |
| work_keys_str_mv | AT hongzhicheng influenceofsurfaceroughnessonahighlyloadedaxialcompressorstageperformanceatlowreynoldsnumber AT mingyangwang influenceofsurfaceroughnessonahighlyloadedaxialcompressorstageperformanceatlowreynoldsnumber AT chuangxinzhou influenceofsurfaceroughnessonahighlyloadedaxialcompressorstageperformanceatlowreynoldsnumber AT shengfengzhao influenceofsurfaceroughnessonahighlyloadedaxialcompressorstageperformanceatlowreynoldsnumber AT xingenlu influenceofsurfaceroughnessonahighlyloadedaxialcompressorstageperformanceatlowreynoldsnumber AT junqiangzhu influenceofsurfaceroughnessonahighlyloadedaxialcompressorstageperformanceatlowreynoldsnumber |