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- 저자 : ( Shun Jie Yang ) (검색결과 1 건)
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Ethanol and Water Atomization of Like- and Unlike-Doublet Impinging Jets
( Wei Hsiang Lai ),( Shun Jie Yang ),( Wen Non Huang ) 한국액체미립화학회 2005 한국액체미립화학회 학술강연회 논문집 Vol.2005 No.-
The objective of the present study is to further investigate the general influence of the physical properties and environment effects on the mean drop size generated by like- and unlike-doublet impinging jets with 95% ethanol and purified water. The orifice of the injector element are 0.3, 0.5, and 0.7 mm in diameter, with depth-to-diameter ratio of 10, the impinging angle is set to be 60°, 90° and 120° respectively. In order to measure the mean drop size, the jet velocity is varied from 2 m/s to 30 m/s, the environment pressure is designated as 1, 2, 5 and 9 bar. Results show that in liquid shape mode, the larger impinging angle, the lower jet velocity threshold of mode transition is observed. Regarding the liquid film size, an empirical equation can be used to calculate the ψ angle, and the equation induced by Ibrahim et al.(1991) can figure out the film length by multiply a constant, which is related to the viscosity. The SMD of unlike-doublet impinging is highly influenced by the surface tension. High ambient pressure has no effect on film size, but it causes the liquid shape change mode in lower jet velocity.
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