http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
혼 타입 초음파 분산기 팁 발생입자 특성 및 나노유체 물성에의 영향
강치훈(Chi-Hoon Kang),강용태(Yong-Tae Kang),구준모(June-Mo Koo) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
The horn type ultrasonic homogenizer is used in the nanofluid dispersion process owing to its high power density delivered to the fluid causing cavitation effects. However, it is found that the horn tip made of titanium-vanadium-alumina alloy comes off from the body and entrains into nanofluids, which could affect the thermal properties of nanofluids. From the SEM/EDX analysis, it is found that the entrained particle is mainly composed of titanium. The amount of entrained particles is found to increase with the sonication power and duration. The post-sonication size of the entrained particles ranges mainly 300-400㎚ under the 20% of the maximum power condition, and 100-200㎚ at the maximum power condition. Particles grow in size with time to precipate to the bottom. In this study, the characteristics of the entrained particles are identified and the effects of the entrained particles on the thermal properties of nanofluids are investigated.