| Experimental estimation of turbulence modulation in droplet-laden two-phase jet | |
| Wu, Hao1,2; Zhang, Zhenyu1; Zhang, Fujun1; Wu K(吴坤)3; Roberts, William L.2 | |
| Corresponding Author | Zhang, Zhenyu([email protected]) |
| Source Publication | PHYSICAL REVIEW FLUIDS
 |
| 2023-09-05 | |
| Volume | 8Issue:9Pages:27 |
| ISSN | 2469-990X |
| Abstract | The effect of liquid droplets generated from air-assisted atomization on gas flow characteristics was studied experimentally. A phase/Doppler particle analyzer was used to measure velocity and size distributions of continuous and dispersed phases in the dropletladen two-phase flow. A comparison of mean gas velocity with and without droplets indicates the expected influence of dispersed phase on the carrier phase, i.e., two-way coupling. The flow characterization result shows the presence of liquid droplets contributes to the increase of gas-phase flow velocity in the spray field. The effect of liquid droplets on gas-phase turbulence is manifested in three ways. First, the presence of droplets leads to the increase in fluctuation velocity of gas-phase flow. Subsequently, it is observed that the range of fluctuation velocities in the gas phase is expanded in two-phase flow compared with single-phase flow. In the region characterized by a steep velocity gradient, the initial gas fluctuation velocities in two-phase flow demonstrate a notable enhancement of 20% compared with single-phase flow. Furthermore, the presence of droplets induces axial stretching within the shear region of the gas phase, and this stretching effect is particularly pronounced in cases of higher fuel-injection durations, primarily due to the influence of droplet gravity. The data obtained from the analysis of velocity gradient and fluctuation velocity within the two-phase flow field reveal a distinct segmental linear relationship, deviating from previous findings reported in the literature and highlighting a deeper understanding of the underlying mechanisms in current two-phase flow systems. |
| DOI | 10.1103/PhysRevFluids.8.094301 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001070817900003 |
| WOS Keyword | PARTICLE-SIZE ; FLOW ; ATOMIZATION ; CHANNEL ; SPRAY ; INTENSITY ; COARSE |
| WOS Research Area | Physics |
| WOS Subject | Physics, Fluids & Plasmas |
| Funding Project | National Natural Science Foundation of China[12072194] ; National Natural Science Foundation of China[51806013] ; foundation research funds of the Ministry of Industry and Information Technology[JCKY2019602D018] ; Beijing Institute of Technology Research Fund Program for Young Scholars[2020CX04047] |
| Funding Organization | 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 |
| Classification | 二类 |
| Ranking | 3+ |
| Contributor | Zhang, Zhenyu |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/93006 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China; 2.King Abdullah Univ Sci & Technol, Clean Combust Res Ctr, Thuwal, Saudi Arabia; 3.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Wu, Hao,Zhang, Zhenyu,Zhang, Fujun,et al. Experimental estimation of turbulence modulation in droplet-laden two-phase jet[J]. PHYSICAL REVIEW FLUIDS,2023,8,9,:27.Rp_Au:Zhang, Zhenyu |
| APA | Wu, Hao,Zhang, Zhenyu,Zhang, Fujun,吴坤,&Roberts, William L..(2023).Experimental estimation of turbulence modulation in droplet-laden two-phase jet.PHYSICAL REVIEW FLUIDS,8(9),27. |
| MLA | Wu, Hao,et al."Experimental estimation of turbulence modulation in droplet-laden two-phase jet".PHYSICAL REVIEW FLUIDS 8.9(2023):27. |
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| Jp2023A099.pdf（4042KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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