지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국유체기계학회 International Journal of Fluid Machinery and Systems International Journal of Fluid Machinery and Systems Vol.10 No.2
- 발행연도
- 2017.6
- 수록면
- 176 - 188 (13page)
- DOI
- 10.5293/IJFMS.2017.10.2.176
이용수
초록· 키워드
오류제보하기
The nozzle-flapper valves are widely applied as a pilot stage in aerospace and military system. A subject of the analysis presented in this work is to find out a reasonable range of null clearance between the nozzle and flapper. This paper has presented a numerical flow coefficient simulation. In every design point, a parameterized model is created for flow coefficient simulation and cavitation under different conditions with varying gap width and inlet pressure. Moreover, a new test device has been designed to measure the flow coefficient and for visualized cavitation. The numerical simulation and test results both indicate that cavitation intensity gets fierce initially and shrinks finally as the gap width varies from small to large. From the curve, the flow coefficient mostly has experienced three stages: linear throttle section, transition section and saturation section. The appropriate deflection of flapper is recommended to make the gap width drop into the linear throttle section. The flapper–nozzle null clearance is optionally recommended near the range of D<SUB>N</SUB>/16. Finally through simulation it is also concluded that the inlet pressure plays a little role in the influence on the flow coefficient.
목차
Abstract
1. Introduction
2. Theoretical background
3. Numerical simulation
4. Experimental design and setup
5. Results and analysis of the simulation and tests
6. Conclusion
References
참고문헌 (18)
참고문헌 신청
[학술지(정기간행물)] - Zhu Y / 2016 / Design criterion involving comprehensive performance characteristics of nozzle-flapper valves / Proceedings of the Institution of Mechanical Engineers Part I Journal of Systems & Control Engineering 230 (5) : 452 ~ 466
[학술지(정기간행물)] - Khodaii z. / 2016 / Modeling the effects of the external acceleration on the two stage flapper-nozzle servo electrohydraulic valves / MODARES MECHANICAL ENGINEERING 15 (11) : 1 ~ 8
[학술대회논문] - Chen Q. / 2004 / CFD Simulation of a Hydraulic Servo Valve With Turbulent Flow and Cavitation / ASME/JSME 2004 Pressure Vessels and Piping Conference : 27 ~ 30
[학술지(정기간행물)] - Aung N Z, Li S. / 2014 / A numerical study of cavitation phenomenon in a flapper-nozzle pilot stage of an electrohydraulic servo-valve with an innovative flapper shape / Energy Conversion & Management 77 (110) : 31 ~ 39
[학술지(정기간행물)] - Aung N Z. / 2014 / CFD analysis of flow forces and energy loss characteristics in a flapper–nozzle pilot valve with different null clearances / Energy Conversion & Management 83 (7) : 284 ~ 295
[학술지(정기간행물)] - Khodaii z. / 2016 / Modeling the effects of the external acceleration on the two stage flapper-nozzle servo electrohydraulic valves / MODARES MECHANICAL ENGINEERING 15 (11) : 1 ~ 8
[학술대회논문] - Chen Q. / 2004 / CFD Simulation of a Hydraulic Servo Valve With Turbulent Flow and Cavitation / ASME/JSME 2004 Pressure Vessels and Piping Conference : 27 ~ 30
[학술지(정기간행물)] - Aung N Z, Li S. / 2014 / A numerical study of cavitation phenomenon in a flapper-nozzle pilot stage of an electrohydraulic servo-valve with an innovative flapper shape / Energy Conversion & Management 77 (110) : 31 ~ 39
[학술지(정기간행물)] - Aung N Z. / 2014 / CFD analysis of flow forces and energy loss characteristics in a flapper–nozzle pilot valve with different null clearances / Energy Conversion & Management 83 (7) : 284 ~ 295
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