Effect of Slide Valve Gap Surface Roughness on Particle Transport Properties
Fuel electro-hydraulic servo valves are core components in the fuel control system of aero-engines, and their performance directly affects thrust regulation and power output precision. Due to the combustibility of the working medium in fuel systems and the lack of effective circulation filtration, t...
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MDPI AG
2025-07-01
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| author | Jin Zhang Ranheng Du Pengpeng Dong Kuohang Zhang Shengrong Wang Ying Li Kuo Zhang |
| author_facet | Jin Zhang Ranheng Du Pengpeng Dong Kuohang Zhang Shengrong Wang Ying Li Kuo Zhang |
| author_sort | Jin Zhang |
| collection | DOAJ |
| description | Fuel electro-hydraulic servo valves are core components in the fuel control system of aero-engines, and their performance directly affects thrust regulation and power output precision. Due to the combustibility of the working medium in fuel systems and the lack of effective circulation filtration, the retention of micron-sized particles within the valve gap can lead to valve spool jamming, which is a critical reliability issue. This study, based on fractal theory and the liquid–solid two-phase flow model, proposes a parametric model for non-ideal surface valve gaps and analyzes the dynamics of particles subjected to drag, lift, and buoyant forces on rough surfaces. By numerically analyzing flow field models with different roughness levels and comparing them with an ideal smooth gap model, the migration characteristics of particles were studied. To verify the accuracy of the model, an upscaled experimental setup was built based on similarity theory, and PIV experiments were conducted for validation. Experimental results show that the particle release position and valve surface roughness significantly affect particle migration time. The weight of the release position on particle migration time is 63%, while the impact of valve surface roughness is 37%. In models with different roughness levels, the particle migration time increases more rapidly for roughness values greater than Ra0.4, while for values less than Ra0.4, the increase in migration time is slower. Furthermore, the study reveals that particle migration trajectories are independent of flow velocity, with velocity only affecting particle migration time. This research provides theoretical support for enhancing the reliability of fuel electro-hydraulic servo valves and offers a new perspective for the design of highly reliable hydraulic components. |
| format | Article |
| id | doaj-art-74e2f6776df34a7bb0b015dee1ec2d75 |
| institution | DOAJ |
| issn | 2226-4310 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
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| series | Aerospace |
| spelling | doaj-art-74e2f6776df34a7bb0b015dee1ec2d752025-08-20T03:13:42ZengMDPI AGAerospace2226-43102025-07-0112760810.3390/aerospace12070608Effect of Slide Valve Gap Surface Roughness on Particle Transport PropertiesJin Zhang0Ranheng Du1Pengpeng Dong2Kuohang Zhang3Shengrong Wang4Ying Li5Kuo Zhang6School of Mechanical Engineering, Yanshan University, Qinhuangdao 066000, ChinaSchool of Mechanical Engineering, Yanshan University, Qinhuangdao 066000, ChinaHangzhou Applied Acoustics Research Institute, Hangzhou 310027, ChinaSchool of Mechanical Engineering, Yanshan University, Qinhuangdao 066000, ChinaAVIC Changchun Control Technology, Changchun 130102, ChinaSchool of Mechanical Engineering, Yanshan University, Qinhuangdao 066000, ChinaSchool of Mechanical Engineering, Yanshan University, Qinhuangdao 066000, ChinaFuel electro-hydraulic servo valves are core components in the fuel control system of aero-engines, and their performance directly affects thrust regulation and power output precision. Due to the combustibility of the working medium in fuel systems and the lack of effective circulation filtration, the retention of micron-sized particles within the valve gap can lead to valve spool jamming, which is a critical reliability issue. This study, based on fractal theory and the liquid–solid two-phase flow model, proposes a parametric model for non-ideal surface valve gaps and analyzes the dynamics of particles subjected to drag, lift, and buoyant forces on rough surfaces. By numerically analyzing flow field models with different roughness levels and comparing them with an ideal smooth gap model, the migration characteristics of particles were studied. To verify the accuracy of the model, an upscaled experimental setup was built based on similarity theory, and PIV experiments were conducted for validation. Experimental results show that the particle release position and valve surface roughness significantly affect particle migration time. The weight of the release position on particle migration time is 63%, while the impact of valve surface roughness is 37%. In models with different roughness levels, the particle migration time increases more rapidly for roughness values greater than Ra0.4, while for values less than Ra0.4, the increase in migration time is slower. Furthermore, the study reveals that particle migration trajectories are independent of flow velocity, with velocity only affecting particle migration time. This research provides theoretical support for enhancing the reliability of fuel electro-hydraulic servo valves and offers a new perspective for the design of highly reliable hydraulic components.https://www.mdpi.com/2226-4310/12/7/608force analysissurface morphologyparticle transportsimilarity theory |
| spellingShingle | Jin Zhang Ranheng Du Pengpeng Dong Kuohang Zhang Shengrong Wang Ying Li Kuo Zhang Effect of Slide Valve Gap Surface Roughness on Particle Transport Properties Aerospace force analysis surface morphology particle transport similarity theory |
| title | Effect of Slide Valve Gap Surface Roughness on Particle Transport Properties |
| title_full | Effect of Slide Valve Gap Surface Roughness on Particle Transport Properties |
| title_fullStr | Effect of Slide Valve Gap Surface Roughness on Particle Transport Properties |
| title_full_unstemmed | Effect of Slide Valve Gap Surface Roughness on Particle Transport Properties |
| title_short | Effect of Slide Valve Gap Surface Roughness on Particle Transport Properties |
| title_sort | effect of slide valve gap surface roughness on particle transport properties |
| topic | force analysis surface morphology particle transport similarity theory |
| url | https://www.mdpi.com/2226-4310/12/7/608 |
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