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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.14 No.1
- 발행연도
- 2020.1
- 수록면
- 129 - 140 (12page)
이용수
초록· 키워드
오류제보하기
A new experimental method on simulating the combined action of cavitation erosion and abrasion was proposed to investigate the erosion mechanism of overflow structure induced by the said processes. An automatic sand mixing device was invented for high-pressure and high-speed flow based on the characteristics of Venturi cavitation generator and hydraulic Bernoulli principle. The experimental system for the combined action of cavitation erosion and abrasion was designed and constructed, and high-speed sand mixing flow only appeared in the test section. A series of tests on the combined and single action of cavitation erosion and abrasion on hydraulic concrete and cement was carried out by using the invented experimental device. Results show that the wear of concrete surface exhibited the combined characteristics of cavitation erosion and abrasion under their joint action. The damage degree of concrete surface under the combined action was more severe than that under a single action. The mass loss of concrete under the combined action was higher than sum of mass losses of concrete under two single actions. The promotion and enhancement between cavitation erosion and abrasion existed in high-speed sand mixing flow. A power exponential relationship was observed between erosion mass loss and flow speed, and the velocity indexes approximated 4.5. Small and light sand particles easily follow water flow. Thus, the strong coupling effect of cavitation erosion and abrasion resulted from the presence of small sand particles. Given the different mechanisms of cavitation erosion and abrasion, presenting the skeleton structure formed by cavitation erosion was notably difficult under the action of abrasion. Meanwhile, abrasion wear easily occurred under the impact of cavitation erosion, and this result is due to the mechanism of the combined action of both processes.
목차
Abstract
1. Introduction
2. New Experimental Method for the Combined Action of Cavitation Erosion and Abrasion
3. Test Device and Test Procedure
4. Test Device Performance and Test Effect
5. Influencing Factor of Erosion
6. Mechanism of Coupling Effect of Cavitation Erosion and Abrasion
7. Conclusions
References
참고문헌 (20)
참고문헌 신청
Ahmet Baylar / 2010 / Effect of Air Inlet Hole Diameter of Venturi Tube on Air Injection Rate / KSCE Journal of Civil Engineering 14(4):489~492
Chen, H. S. / 2009 / Cavitation damages on solid surfaces in suspensions containing spherical and irregular microparticles / Wear 266(1-2):345~348
Dular, M. / 2008 / Pit clustering in cavitation erosion / Wear 265(5-6):811~820
Horszczaruk, E. / 2005 / Abrasion resistance of high-strength concrete in hydraulic structures / Wear 259(1-6):62~69
Hu, X. G. / 2006 / Erosion wear of hydraulic concrete with low steel fiber content / Journal of Hydraulic Engineering 132:1331~1340
Chen, H. S. / 2009 / Cavitation damages on solid surfaces in suspensions containing spherical and irregular microparticles / Wear 266(1-2):345~348
Dular, M. / 2008 / Pit clustering in cavitation erosion / Wear 265(5-6):811~820
Horszczaruk, E. / 2005 / Abrasion resistance of high-strength concrete in hydraulic structures / Wear 259(1-6):62~69
Hu, X. G. / 2006 / Erosion wear of hydraulic concrete with low steel fiber content / Journal of Hydraulic Engineering 132:1331~1340
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UCI(KEPA) : I410-ECN-0101-2020-532-000371178