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- 저자 : ( Deng Sang Lai ) (검색결과 1 건)
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Characteristics of Twin-Fluid Micro-Atomizer with Internal Mixing Mechanisms
( Muh Rong Wang ),( K. H. Yang ),( J. S. Chiu ),( Deng Sang Lai ),( T. S. Leu ),( Sheng Chih Shen ) 한국액체미립화학회 2005 한국액체미립화학회 학술강연회 논문집 Vol.2005 No.-
The twin-fluid atomizer has three micro channels fabricated via MEMS bulk micro-machining processes, one for the liquid supply and two for introducing the atomization gas. The effects of the length scale of the micro-channels on the atomization performance are investigated. The orifice hydraulic diameter (dH) of the micro atomizer is 45μm. Malvern Insitec RT-Sizer is used to measure the particle size. Results show that the twin-fluid micro-atomizer with internal mixing mechanisms can produce fine spray with Sauter Mean Diameter of 5μm under the gas pressure of 5kg/cm2 and liquid flow rate of 0.1ml/min, a performance better than the micro atomizers reported in the literature. Flow visualization through a microscope shows that the micro-spray is unstable when the two impinging gas flows are staggered inside the atomizer. The micro-spray began to twist by these two impinging gas flows when the gas pressure goes up to 2 kg/cm2. The twisting angle and the cone angle of the spray remain constant when the gas pressure is more than 3 kg/cm2. Significant decrease in the particle size takes place when the gas pressure is more than 4kg/cm2. The atomization efficiency of the twin-fluid micro-atomizer with internal mixing mechanism is several times higher than other type of twin-fluid atomizers.
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