{"title":"水滴撞击加热甘油表面的实验研究","authors":"S. Jin, W. Zhang, Z. Guo, Y. Yuan, Z. Shi, J. Yan","doi":"10.1134/s0015462823601870","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The phenomena of droplet impact on the heated liquid surface are difficult to unify due to complexity of the interaction, but this process has significance for the study such as direct fuel injection in internal-combustion engines or pool fire suppression. A series of experiments on a water droplet impacting on the heated glycerol surface are carried under various surface temperatures (111.4°C ≤ <i>T</i><sub>gly</sub> ≤ 270.6°C) and impact Weber number (50.5 ≤ We ≤ 297.9). Four regimes, including penetration, crater–jet, vapor explosion and crater–jet–vapor explosion, are discussed in detail. With increase in the <i>T</i><sub>gly</sub> and We, the phenomena transform easier from penetration to crater–jet. The jet formation is affected by the interaction of vapor explosion (<i>T</i><sub>gly</sub> ≥ 222.3°C) and this process is mainly caused by two factors: the vapor explosion appears at the liquid-liquid interface and the vapor explosion time is equal to 4.8–15.8 ms. Increase in <i>T</i><sub>gly</sub> and We prolongs the crater evolution process and leads to growth of the maximum dimensionless crater depth (<i>h</i><sub>max</sub>). The contribution index shows that <i>h</i><sub>max</sub> is significantly increased by the vapor explosion and continued to increase for the higher We. Furthermore, the secondary breakup of droplets is observed at <i>T</i><sub>gly</sub> ≥ 222.3°C and this phenomenon mainly includes the processes of puffing, sputtering, vaporization and deformation.</p>","PeriodicalId":560,"journal":{"name":"Fluid Dynamics","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Experimental Study on a Water Droplet Impacting on the Heated Glycerol Surface\",\"authors\":\"S. Jin, W. Zhang, Z. Guo, Y. Yuan, Z. Shi, J. Yan\",\"doi\":\"10.1134/s0015462823601870\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<h3 data-test=\\\"abstract-sub-heading\\\">Abstract</h3><p>The phenomena of droplet impact on the heated liquid surface are difficult to unify due to complexity of the interaction, but this process has significance for the study such as direct fuel injection in internal-combustion engines or pool fire suppression. A series of experiments on a water droplet impacting on the heated glycerol surface are carried under various surface temperatures (111.4°C ≤ <i>T</i><sub>gly</sub> ≤ 270.6°C) and impact Weber number (50.5 ≤ We ≤ 297.9). Four regimes, including penetration, crater–jet, vapor explosion and crater–jet–vapor explosion, are discussed in detail. With increase in the <i>T</i><sub>gly</sub> and We, the phenomena transform easier from penetration to crater–jet. The jet formation is affected by the interaction of vapor explosion (<i>T</i><sub>gly</sub> ≥ 222.3°C) and this process is mainly caused by two factors: the vapor explosion appears at the liquid-liquid interface and the vapor explosion time is equal to 4.8–15.8 ms. Increase in <i>T</i><sub>gly</sub> and We prolongs the crater evolution process and leads to growth of the maximum dimensionless crater depth (<i>h</i><sub>max</sub>). The contribution index shows that <i>h</i><sub>max</sub> is significantly increased by the vapor explosion and continued to increase for the higher We. Furthermore, the secondary breakup of droplets is observed at <i>T</i><sub>gly</sub> ≥ 222.3°C and this phenomenon mainly includes the processes of puffing, sputtering, vaporization and deformation.</p>\",\"PeriodicalId\":560,\"journal\":{\"name\":\"Fluid Dynamics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2024-01-31\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Fluid Dynamics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1134/s0015462823601870\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MECHANICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fluid Dynamics","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1134/s0015462823601870","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MECHANICS","Score":null,"Total":0}
引用次数: 0
摘要
摘要 由于相互作用的复杂性,水滴撞击受热液体表面的现象很难统一,但这一过程对内燃机燃料直接喷射或水池灭火等研究具有重要意义。在不同的表面温度(111.4°C ≤ Tgly ≤ 270.6°C)和冲击韦伯数(50.5 ≤ We ≤ 297.9)条件下,对水滴冲击加热的甘油表面进行了一系列实验。详细讨论了穿透、陨石坑-喷射、蒸汽爆炸和陨石坑-喷射-蒸汽爆炸等四种情况。随着 Tgly 和 We 的增加,现象更容易从穿透转变为火山口喷射。喷流的形成受到汽爆(Tgly ≥ 222.3°C)相互作用的影响,而这一过程主要由两个因素造成:汽爆出现在液-液界面,汽爆时间等于 4.8-15.8 ms。Tgly 和 We 的增加延长了陨石坑的演化过程,并导致最大无量纲陨石坑深度(hmax)的增加。贡献指数表明,hmax 在汽爆作用下显著增加,并在 We 越大时继续增加。此外,在 Tgly ≥ 222.3°C 时观察到液滴的二次破裂,这种现象主要包括膨化、溅射、汽化和变形过程。
Experimental Study on a Water Droplet Impacting on the Heated Glycerol Surface
Abstract
The phenomena of droplet impact on the heated liquid surface are difficult to unify due to complexity of the interaction, but this process has significance for the study such as direct fuel injection in internal-combustion engines or pool fire suppression. A series of experiments on a water droplet impacting on the heated glycerol surface are carried under various surface temperatures (111.4°C ≤ Tgly ≤ 270.6°C) and impact Weber number (50.5 ≤ We ≤ 297.9). Four regimes, including penetration, crater–jet, vapor explosion and crater–jet–vapor explosion, are discussed in detail. With increase in the Tgly and We, the phenomena transform easier from penetration to crater–jet. The jet formation is affected by the interaction of vapor explosion (Tgly ≥ 222.3°C) and this process is mainly caused by two factors: the vapor explosion appears at the liquid-liquid interface and the vapor explosion time is equal to 4.8–15.8 ms. Increase in Tgly and We prolongs the crater evolution process and leads to growth of the maximum dimensionless crater depth (hmax). The contribution index shows that hmax is significantly increased by the vapor explosion and continued to increase for the higher We. Furthermore, the secondary breakup of droplets is observed at Tgly ≥ 222.3°C and this phenomenon mainly includes the processes of puffing, sputtering, vaporization and deformation.
期刊介绍:
Fluid Dynamics is an international peer reviewed journal that publishes theoretical, computational, and experimental research on aeromechanics, hydrodynamics, plasma dynamics, underground hydrodynamics, and biomechanics of continuous media. Special attention is given to new trends developing at the leading edge of science, such as theory and application of multi-phase flows, chemically reactive flows, liquid and gas flows in electromagnetic fields, new hydrodynamical methods of increasing oil output, new approaches to the description of turbulent flows, etc.