同轴双通道气流式雾化喷嘴初次雾化过程

CAO Xiankui; XU Jianliang; LI Weifeng; LIU Haifeng; YU Zunhong

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同轴双通道气流式雾化喷嘴初次雾化过程

更新时间：2025-12-10

- 同轴双通道气流式雾化喷嘴初次雾化过程
- CIESC Journal Issue 11, (2006)
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- Online First：25 November 2006，
  
  Published：25 November 2006
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CAO Xiankui, XU Jianliang, LI Weifeng, et al. 同轴双通道气流式雾化喷嘴初次雾化过程[J]. CIESC Journal, 2006, (11).
DOI：

CAO Xiankui, XU Jianliang, LI Weifeng, et al. 同轴双通道气流式雾化喷嘴初次雾化过程[J]. CIESC Journal, 2006, (11). DOI：

摘要

对同轴双通道气流式雾化喷嘴的初次雾化过程进行了实验研究，发现在初次雾化过程中，初始微小扰动经过一段距离（即未扰动长度）后，在液体射流表面发展成为可以观察到的不稳定波.当气速Ug超过一临界值（大约25 m·s-1）时，在不稳定波的波峰附近，形成小的突起，这些突起迅速被拉成细长液丝，液丝进一步破裂成液滴，最终导致液体的初次雾化.同时得到不稳定波长λm与环隙通道出口气速Ug、中心通道出口水速UL的关系为λm＝68.60 U-0.79gU-0.24L;未扰动长度Lu与气速Ug、水速UL的关系为Lu＝783.8 U-1.54gU-0.16L.

Abstract

The primary atomization process of coaxial two-channel air-blast atomizer was investigated experimentally.During the coaxial air-blast atomization process

small initial disturbances were amplified after a certain length (called an undisturbed length

Lu) and evolved into unstable waves eventually

which could be observed on the surface of the liquid jet.Above a critical gas exit velocity (about 25 m·s-1)

liquid ligaments were produced at the wave crests and further stretched into the air stream.Finally

the liquid ligaments broke up into droplets

leading to the primary atomization of liquid jet.The relationship between instability wavelength λm and the air velocity Ug and water velocity UL was λm=68.60 U-0.79gU-0.24L.And the relationship between the undisturbed length Lu and the air velocity Ug and water velocity was Lu=783.8 U-1.54gU-0.16L.

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