本文選題：微滴噴射　切入點：納米銀　出處：《機械設計與制造》2016年10期 　論文類型：期刊論文

【摘要】：微滴噴射均勻液滴噴射過程受到多種因素的制約,包括壓力波幅值、液滴物性(黏度、表面張力等)、噴嘴尺寸等。為深入理解微滴噴射過程機理,基于流體體積法建立了均勻液滴噴射數(shù)值模型,研究了壓電驅動電壓幅值對低粘度納米銀墨水穩(wěn)定噴射行為的影響。通過數(shù)值仿真,給出了驅動電壓幅值與液滴斷裂長度、液滴飛行速度的數(shù)值關系,以及液滴飛行速度與衛(wèi)星液滴的變化關系。采用27μm噴嘴直徑的工業(yè)噴頭構建微滴噴射系統(tǒng),低粘度納米銀墨水為噴射材料,通過觀測噴印到光面相紙的液滴尺寸及衛(wèi)星液滴數(shù)量對數(shù)值模型進行實驗驗證。結果表明,液滴飛行速度取決于驅動電壓幅值,液滴尺寸分布及衛(wèi)星液滴數(shù)量取決于液滴飛行速度,與數(shù)值模型相吻合。通過數(shù)值模型仿真,針對納米銀墨水物性指標匹配合適的驅動電壓幅值,生成均勻液滴流,對微液滴成型的工業(yè)化應用具有重要的理論指導意義。
[Abstract]:The process of droplet injection is restricted by many factors, including the amplitude of pressure wave, the properties of droplet (viscosity, surface tension, etc.), the size of nozzle and so on. Based on the fluid volume method, a numerical model of uniform droplet injection is established, and the effect of piezoelectric driving voltage amplitude on the stable spray behavior of low viscosity nano-silver ink is studied. The driving voltage amplitude and the liquid drop breaking length are given by numerical simulation. The numerical relationship of droplet velocity and the relationship between droplet velocity and satellite droplet. A micro droplet injection system was constructed with an industrial nozzle with a diameter of 27 渭 m. The low viscosity nano-silver ink was used as the injection material. The numerical model is verified by observing the size of droplet and the number of satellite droplets. The results show that the speed of droplet flying depends on the amplitude of driving voltage. The size distribution of the droplet and the number of the satellite droplets depend on the droplet flying speed, which are consistent with the numerical model. Through the simulation of the numerical model, the proper driving voltage amplitude is matched according to the physical properties of the nano-silver ink, and the uniform droplet flow is generated. It has important theoretical guidance significance for the industrial application of micro droplet molding.
【作者單位】： 中國科學院沈陽自動化研究所;中國科學院大學;
【基金】：國家863計劃項目(2014AA052102)
【分類號】：TH16

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本文編號：1587011