Experimental study of the spray characteristics of twin-fluid atomization: Focusing on the annular flow regime
文献类型：期刊论文
| 作者 | Liu C(刘畅); Wu K(吴坤); Zhang, Zhenyu; Yuan YM(袁越明); Fan XJ(范学军)
|
| 刊名 | PHYSICS OF FLUIDS
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 34期号:12页码:21 |
| ISSN号 | 1070-6631 |
| DOI | 10.1063/5.0128231 |
| 通讯作者 | Wu, Kun(wukun@imech.ac.cn) |
| 英文摘要 | The characteristics of twin-fluid atomization operating in the annular flow regime were studied experimentally under various gas-to-liquid ratios (GLRs) and injection pressures. The macroscopic morphology of the spray was obtained by shadowgraph, while the droplet size and velocity were measured using a phase-Doppler particle analyzer technique. It was found that the spray cone angle increases almost linearly with the GLR, and the axial distance required for droplet coalescence to outweigh the breakup decreases with increasing GLR. The Sauter mean diameter (SMD) first decreases and then increases along the axial direction due to the competition between turbulent breakup and droplet coalescence. The droplet size follows a lognormal distribution; the droplet velocity distribution is closer to a lognormal distribution under large GLRs, while it follows normal distribution with GLR 1/4 3%. Regarding the radial distribution, low GLRs (3% and 5%) lead to a bimodal spatial velocity distribution, while for large GLRs, the droplet velocity decreases monotonically toward the far field. The spray tends to become more stable with increasing GLR and injection pressure P-inj, whereas the SMD increases with increasing P-inj. The underlying atomization mechanism in a twin-fluid injector in the annular flow state can be regarded as the disintegration of the initial liquid sheet by longitudinal Kelvin-Helmholtz instability followed by transverse Rayleigh-Taylor instability, which yields a direct proportionality of the droplet size to the initial liquid sheet thickness delta(L). Subsequently, for high Pinj, the gas core shrinks and DL increases, which results in an increased SMD but enhanced atomization efficiency delta(L)=SMD. |
| 分类号 | 一类/力学重要期刊 |
| WOS关键词 | LIQUID SHEET ; EFFERVESCENT ATOMIZER ; BREAKUP ; AIR ; MECHANISM ; JET ; INSTABILITY |
| 资助项目 | National Natural Science Foundation of China ; Foundation Research Funds of the Ministry of Industry and Information Technology ; Beijing Institute of Technology Research Fund Program for Young Scholars ; [51806013] ; [JCKY2019602D018] ; [WDZC-2019-JGKK-02] ; [2020CX04047] |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000916458500005 |
| 资助机构 | National Natural Science Foundation of China ; Foundation Research Funds of the Ministry of Industry and Information Technology ; Beijing Institute of Technology Research Fund Program for Young Scholars |
| 其他责任者 | Wu, Kun |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/91528]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Liu C,Wu K,Zhang, Zhenyu,et al. Experimental study of the spray characteristics of twin-fluid atomization: Focusing on the annular flow regime[J]. PHYSICS OF FLUIDS,2022,34(12):21. |
| APA | 刘畅,吴坤,Zhang, Zhenyu,袁越明,&范学军.(2022).Experimental study of the spray characteristics of twin-fluid atomization: Focusing on the annular flow regime.PHYSICS OF FLUIDS,34(12),21. |
| MLA | 刘畅,et al."Experimental study of the spray characteristics of twin-fluid atomization: Focusing on the annular flow regime".PHYSICS OF FLUIDS 34.12(2022):21. |
入库方式： OAI收割
来源：力学研究所
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