Sensitivity Analysis of Scallop Damper Seal Design Parameters for Leakage and Static Performance
The leakage characteristics and static stiffness of scallop damper seals have a significant impact on rotor vibration and stability. A parameter sensitivity analysis model for geometrical parameters in scallop damper seals was developed using a design of experiments (DOE) approach. The method employ...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
|
| Series: | Aerospace |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2226-4310/11/12/1052 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846106488794251264 |
|---|---|
| author | Minglong Yao Wanfu Zhang Qianqian Zhao Qianlei Gu Liyun Zhang Jianing Yin |
| author_facet | Minglong Yao Wanfu Zhang Qianqian Zhao Qianlei Gu Liyun Zhang Jianing Yin |
| author_sort | Minglong Yao |
| collection | DOAJ |
| description | The leakage characteristics and static stiffness of scallop damper seals have a significant impact on rotor vibration and stability. A parameter sensitivity analysis model for geometrical parameters in scallop damper seals was developed using a design of experiments (DOE) approach. The method employed a central composite design, integrating factorial, axial, and center points to assess non-linear effects efficiently. And the effects of radial clearance, cavity depth, and length–diameter ratios on leakage performance and rotor stability were investigated. The leakage rate, flow-induced force, and static stiffness coefficient for 15 different combinations of geometric parameters at eccentricities of 0.2 and 0.4 were numerically calculated. The results show that eccentricity has little effect on leakage and its parameter sensitivity. Larger cavity depths and length–diameter ratios are beneficial for seal leakage performance. The tangential force increases with increasing eccentricity but decreases with increasing radial clearance, while it first decreases and then increases with the increase in the cavity depth and length–diameter ratios. Additionally, the radial force decreases with the increase in the length-to-diameter ratio and increases first and then decreases with the increase in radial clearance. The parameter level in this study is defined as the ratio of the actual parameter value to the maximum parameter value. Static direct stiffness reaches its maximum value at a radial clearance level of 30.2%. It remains positive within a cavity depth range of 92.3~100%, as well as a length–diameter ratio range of 0~20.3%. The static cross-coupled stiffness gradually decreases with the increase in radial clearance but first decreases and then increases with the increase in the cavity depth or length–diameter ratio levels. The research results presented in this paper can serve as a reference for the analysis of the performance and design of scallop damper seals. |
| format | Article |
| id | doaj-art-64ab49b9b3814a6d944b63e628c1f303 |
| institution | Kabale University |
| issn | 2226-4310 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Aerospace |
| spelling | doaj-art-64ab49b9b3814a6d944b63e628c1f3032024-12-27T14:02:39ZengMDPI AGAerospace2226-43102024-12-011112105210.3390/aerospace11121052Sensitivity Analysis of Scallop Damper Seal Design Parameters for Leakage and Static PerformanceMinglong Yao0Wanfu Zhang1Qianqian Zhao2Qianlei Gu3Liyun Zhang4Jianing Yin5School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaSchool of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaPower China Jiangxi Electric Power Construction Co., Ltd., Nanjing 210019, ChinaSchool of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaSchool of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaSchool of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaThe leakage characteristics and static stiffness of scallop damper seals have a significant impact on rotor vibration and stability. A parameter sensitivity analysis model for geometrical parameters in scallop damper seals was developed using a design of experiments (DOE) approach. The method employed a central composite design, integrating factorial, axial, and center points to assess non-linear effects efficiently. And the effects of radial clearance, cavity depth, and length–diameter ratios on leakage performance and rotor stability were investigated. The leakage rate, flow-induced force, and static stiffness coefficient for 15 different combinations of geometric parameters at eccentricities of 0.2 and 0.4 were numerically calculated. The results show that eccentricity has little effect on leakage and its parameter sensitivity. Larger cavity depths and length–diameter ratios are beneficial for seal leakage performance. The tangential force increases with increasing eccentricity but decreases with increasing radial clearance, while it first decreases and then increases with the increase in the cavity depth and length–diameter ratios. Additionally, the radial force decreases with the increase in the length-to-diameter ratio and increases first and then decreases with the increase in radial clearance. The parameter level in this study is defined as the ratio of the actual parameter value to the maximum parameter value. Static direct stiffness reaches its maximum value at a radial clearance level of 30.2%. It remains positive within a cavity depth range of 92.3~100%, as well as a length–diameter ratio range of 0~20.3%. The static cross-coupled stiffness gradually decreases with the increase in radial clearance but first decreases and then increases with the increase in the cavity depth or length–diameter ratio levels. The research results presented in this paper can serve as a reference for the analysis of the performance and design of scallop damper seals.https://www.mdpi.com/2226-4310/11/12/1052scallop damper sealdesign of experimentsflow-induced forcesstatic stiffness coefficientsleakage flow rate |
| spellingShingle | Minglong Yao Wanfu Zhang Qianqian Zhao Qianlei Gu Liyun Zhang Jianing Yin Sensitivity Analysis of Scallop Damper Seal Design Parameters for Leakage and Static Performance Aerospace scallop damper seal design of experiments flow-induced forces static stiffness coefficients leakage flow rate |
| title | Sensitivity Analysis of Scallop Damper Seal Design Parameters for Leakage and Static Performance |
| title_full | Sensitivity Analysis of Scallop Damper Seal Design Parameters for Leakage and Static Performance |
| title_fullStr | Sensitivity Analysis of Scallop Damper Seal Design Parameters for Leakage and Static Performance |
| title_full_unstemmed | Sensitivity Analysis of Scallop Damper Seal Design Parameters for Leakage and Static Performance |
| title_short | Sensitivity Analysis of Scallop Damper Seal Design Parameters for Leakage and Static Performance |
| title_sort | sensitivity analysis of scallop damper seal design parameters for leakage and static performance |
| topic | scallop damper seal design of experiments flow-induced forces static stiffness coefficients leakage flow rate |
| url | https://www.mdpi.com/2226-4310/11/12/1052 |
| work_keys_str_mv | AT minglongyao sensitivityanalysisofscallopdampersealdesignparametersforleakageandstaticperformance AT wanfuzhang sensitivityanalysisofscallopdampersealdesignparametersforleakageandstaticperformance AT qianqianzhao sensitivityanalysisofscallopdampersealdesignparametersforleakageandstaticperformance AT qianleigu sensitivityanalysisofscallopdampersealdesignparametersforleakageandstaticperformance AT liyunzhang sensitivityanalysisofscallopdampersealdesignparametersforleakageandstaticperformance AT jianingyin sensitivityanalysisofscallopdampersealdesignparametersforleakageandstaticperformance |