Pressure Characteristics Analysis of the Deflector Jet Pilot Stage Under Dynamic Skewed Velocity Distribution
The velocity distribution at the deflector jet outlet significantly influences the pressure characteristics of the pilot stage, thereby affecting the dynamic performance of the servo valve. Conventional mathematical models fail to account for the influence of dynamic velocity distribution on pilot s...
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MDPI AG
2025-07-01
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| Series: | Aerospace |
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| Online Access: | https://www.mdpi.com/2226-4310/12/7/638 |
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| _version_ | 1839616783499132928 |
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| author | Zhilin Cheng Wenjun Yang Liangcai Zeng Lin Wu |
| author_facet | Zhilin Cheng Wenjun Yang Liangcai Zeng Lin Wu |
| author_sort | Zhilin Cheng |
| collection | DOAJ |
| description | The velocity distribution at the deflector jet outlet significantly influences the pressure characteristics of the pilot stage, thereby affecting the dynamic performance of the servo valve. Conventional mathematical models fail to account for the influence of dynamic velocity distribution on pilot stage pressure characteristics, resulting in significant deviations from actual situations. As the deflector shifts, the secondary jet velocity distribution transitions from a symmetric to an asymmetric dynamic profile, altering the pressure within the receiving chambers. To address this, a dynamic skewed velocity distribution model is proposed to more accurately capture the pressure characteristics. The relationship between the skewness coefficient and deflector displacement is established, and the pressure calculation method for the receiving chambers is refined accordingly. A comparative analysis shows that the proposed model aligns most closely with computational fluid dynamics results, achieving a 98% match in velocity distribution and a maximum pressure error of 1.43%. This represents an improvement of 84.98% over the normal model and 82.35% over the uniform model, confirming the superior accuracy of the dynamic skewed model in pilot stage pressure calculation. |
| format | Article |
| id | doaj-art-c488ee5fb43d4575a33fecb7909a3f4d |
| institution | Matheson Library |
| issn | 2226-4310 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Aerospace |
| spelling | doaj-art-c488ee5fb43d4575a33fecb7909a3f4d2025-07-25T13:09:11ZengMDPI AGAerospace2226-43102025-07-0112763810.3390/aerospace12070638Pressure Characteristics Analysis of the Deflector Jet Pilot Stage Under Dynamic Skewed Velocity DistributionZhilin Cheng0Wenjun Yang1Liangcai Zeng2Lin Wu3Key Laboratory of Metallurgical Equipment and Control Technology, Ministry of Education, School of Mechanical Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaKey Laboratory of Metallurgical Equipment and Control Technology, Ministry of Education, School of Mechanical Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaKey Laboratory of Metallurgical Equipment and Control Technology, Ministry of Education, School of Mechanical Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaKey Laboratory of Metallurgical Equipment and Control Technology, Ministry of Education, School of Mechanical Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe velocity distribution at the deflector jet outlet significantly influences the pressure characteristics of the pilot stage, thereby affecting the dynamic performance of the servo valve. Conventional mathematical models fail to account for the influence of dynamic velocity distribution on pilot stage pressure characteristics, resulting in significant deviations from actual situations. As the deflector shifts, the secondary jet velocity distribution transitions from a symmetric to an asymmetric dynamic profile, altering the pressure within the receiving chambers. To address this, a dynamic skewed velocity distribution model is proposed to more accurately capture the pressure characteristics. The relationship between the skewness coefficient and deflector displacement is established, and the pressure calculation method for the receiving chambers is refined accordingly. A comparative analysis shows that the proposed model aligns most closely with computational fluid dynamics results, achieving a 98% match in velocity distribution and a maximum pressure error of 1.43%. This represents an improvement of 84.98% over the normal model and 82.35% over the uniform model, confirming the superior accuracy of the dynamic skewed model in pilot stage pressure calculation.https://www.mdpi.com/2226-4310/12/7/638deflector jet servo valvedynamic skewed velocity distributionflow field analysispressure characteristics |
| spellingShingle | Zhilin Cheng Wenjun Yang Liangcai Zeng Lin Wu Pressure Characteristics Analysis of the Deflector Jet Pilot Stage Under Dynamic Skewed Velocity Distribution Aerospace deflector jet servo valve dynamic skewed velocity distribution flow field analysis pressure characteristics |
| title | Pressure Characteristics Analysis of the Deflector Jet Pilot Stage Under Dynamic Skewed Velocity Distribution |
| title_full | Pressure Characteristics Analysis of the Deflector Jet Pilot Stage Under Dynamic Skewed Velocity Distribution |
| title_fullStr | Pressure Characteristics Analysis of the Deflector Jet Pilot Stage Under Dynamic Skewed Velocity Distribution |
| title_full_unstemmed | Pressure Characteristics Analysis of the Deflector Jet Pilot Stage Under Dynamic Skewed Velocity Distribution |
| title_short | Pressure Characteristics Analysis of the Deflector Jet Pilot Stage Under Dynamic Skewed Velocity Distribution |
| title_sort | pressure characteristics analysis of the deflector jet pilot stage under dynamic skewed velocity distribution |
| topic | deflector jet servo valve dynamic skewed velocity distribution flow field analysis pressure characteristics |
| url | https://www.mdpi.com/2226-4310/12/7/638 |
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