Temperature measurements in a string of three closely spaced droplets before the start of puffing/micro-explosion: Experimental results and modelling

Dmitry Antonov; Roman Volkov; Roman  Fedorenko; Pavel  Strizhak; Gullaume  Castanet; Sergei Sazhin

doi:10.1016/j.ijheatmasstransfer.2021.121837

Temperature measurements in a string of three closely spaced droplets before the start of puffing/micro-explosion: Experimental results and modelling

Dmitry Antonov, Roman Volkov, Roman Fedorenko, Pavel Strizhak, Gullaume Castanet, Sergei Sazhin

Research output: Contribution to journal › Article › peer-review

Abstract

The results of experimental and theoretical investigation of the mutual effects of three composite Diesel fuel/water droplets, one behind the other, on their puffing/micro-explosion are presented. The analysis is focused not only on finding the time instant when puffing/micro-explosion starts, but also on the investigation of time evolution of temperature at the water-fuel interface before the development of puffing/micro-explosion. The experimentally observed temperatures at the water-fuel interface are shown to increase almost linearly with time for the lead, middle and downstream droplets. Assuming that puffing/micro-explosion starts when the temperature at this interface reaches the water nucleation temperature, the values of the latter temperature as a function of the heating rate were found from the experimental data. The results are shown to be consistent with the earlier found correlation for this temperature for all three droplets. Time to puffing/micro-explosion is shown to decrease with increasing gas temperature; this time for the lead droplet is always shorter than that of the middle and downstream droplets, and the difference between them decreases as the distance between droplets increases. The experimental results are interpreted in terms of the previously developed model based on the assumption that the water sub-droplet is located exactly in the centre of the Diesel fuel droplet and that this process is triggered when the temperature at the water/fuel interface attains the water nucleation temperature. The effect of interaction between lead, middle and downstream droplets is considered via modifications to the Nusselt (Nu) and Sherwood (Sh) numbers for these droplets due to the interaction between them.

Original language	English
Article number	121837
Number of pages	40
Journal	International Journal of Heat and Mass Transfer
Volume	181
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2021.121837
Publication status	Published - 20 Aug 2021

Bibliographical note

Funding Information:
The authors are grateful: to the National Research Tomsk Polytechnic University (project VIU-ISHFVP-60/2019) which supported P.A. Strizhak (who contributed to the formulation of the problem and analysis of the results) and R.S. Volkov (who contributed to the development of the experimental setup); for scholarships from the President of the Russian Federation (Grants SP-447.2021.1 and MN-7/2260) which supported D. Antonov and R. Fedorenko (who performed the experiments, applied the model to their analysis and prepared the first draft of the paper); to the Universit? de Lorraine and the Institut Carnot Ic?el for the CALICO (Combustion d'A?rosols LIquides Complexes) grant which supported G. Castanet (who contributed to the development of the model, the simulations and preparation of the text of the paper), and to the Russian Science Foundation (Grant 21-19-00876), which supported S.S. Sazhin (who contributed to the development of the model, analysis of the results and preparation of the text of the paper).

Funding Information:
The authors are grateful: to the National Research Tomsk Polytechnic University (project VIU-ISHFVP-60/2019) which supported P.A. Strizhak (who contributed to the formulation of the problem and analysis of the results) and R.S. Volkov (who contributed to the development of the experimental setup); for scholarships from the President of the Russian Federation (Grants SP-447.2021.1 and MN-7/2260) which supported D. Antonov and R. Fedorenko (who performed the experiments, applied the model to their analysis and prepared the first draft of the paper); to the Université de Lorraine and the Institut Carnot Icéel for the CALICO (Combustion d’Aérosols LIquides Complexes) grant which supported G. Castanet (who contributed to the development of the model, the simulations and preparation of the text of the paper), and to the Russian Science Foundation (Grant 21-19-00876), which supported S.S. Sazhin (who contributed to the development of the model, analysis of the results and preparation of the text of the paper).

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

Composite droplets
puffing
micro-explosion
heating,
evaporation
droplets in a row
Heating
Micro-explosion
Droplets in a row
Evaporation
Puffing

Access to Document

10.1016/j.ijheatmasstransfer.2021.121837

Fedor-Group-12July21-cleanAccepted author manuscript, 7.08 MBLicence: CC BY-NC-ND

Cite this

@article{7e00c43c99924d57b5ff770316b9e729,

title = "Temperature measurements in a string of three closely spaced droplets before the start of puffing/micro-explosion: Experimental results and modelling",

abstract = "The results of experimental and theoretical investigation of the mutual effects of three composite Diesel fuel/water droplets, one behind the other, on their puffing/micro-explosion are presented. The analysis is focused not only on finding the time instant when puffing/micro-explosion starts, but also on the investigation of time evolution of temperature at the water-fuel interface before the development of puffing/micro-explosion. The experimentally observed temperatures at the water-fuel interface are shown to increase almost linearly with time for the lead, middle and downstream droplets. Assuming that puffing/micro-explosion starts when the temperature at this interface reaches the water nucleation temperature, the values of the latter temperature as a function of the heating rate were found from the experimental data. The results are shown to be consistent with the earlier found correlation for this temperature for all three droplets. Time to puffing/micro-explosion is shown to decrease with increasing gas temperature; this time for the lead droplet is always shorter than that of the middle and downstream droplets, and the difference between them decreases as the distance between droplets increases. The experimental results are interpreted in terms of the previously developed model based on the assumption that the water sub-droplet is located exactly in the centre of the Diesel fuel droplet and that this process is triggered when the temperature at the water/fuel interface attains the water nucleation temperature. The effect of interaction between lead, middle and downstream droplets is considered via modifications to the Nusselt (Nu) and Sherwood (Sh) numbers for these droplets due to the interaction between them.",

keywords = "Composite droplets, puffing, micro-explosion, heating,, evaporation, droplets in a row, Heating, Micro-explosion, Droplets in a row, Evaporation, Puffing",

author = "Dmitry Antonov and Roman Volkov and Roman Fedorenko and Pavel Strizhak and Gullaume Castanet and Sergei Sazhin",

note = "Funding Information: The authors are grateful: to the National Research Tomsk Polytechnic University (project VIU-ISHFVP-60/2019) which supported P.A. Strizhak (who contributed to the formulation of the problem and analysis of the results) and R.S. Volkov (who contributed to the development of the experimental setup); for scholarships from the President of the Russian Federation (Grants SP-447.2021.1 and MN-7/2260) which supported D. Antonov and R. Fedorenko (who performed the experiments, applied the model to their analysis and prepared the first draft of the paper); to the Universit? de Lorraine and the Institut Carnot Ic?el for the CALICO (Combustion d'A?rosols LIquides Complexes) grant which supported G. Castanet (who contributed to the development of the model, the simulations and preparation of the text of the paper), and to the Russian Science Foundation (Grant 21-19-00876), which supported S.S. Sazhin (who contributed to the development of the model, analysis of the results and preparation of the text of the paper). Funding Information: The authors are grateful: to the National Research Tomsk Polytechnic University (project VIU-ISHFVP-60/2019) which supported P.A. Strizhak (who contributed to the formulation of the problem and analysis of the results) and R.S. Volkov (who contributed to the development of the experimental setup); for scholarships from the President of the Russian Federation (Grants SP-447.2021.1 and MN-7/2260) which supported D. Antonov and R. Fedorenko (who performed the experiments, applied the model to their analysis and prepared the first draft of the paper); to the Universit{\'e} de Lorraine and the Institut Carnot Ic{\'e}el for the CALICO (Combustion d{\textquoteright}A{\'e}rosols LIquides Complexes) grant which supported G. Castanet (who contributed to the development of the model, the simulations and preparation of the text of the paper), and to the Russian Science Foundation (Grant 21-19-00876), which supported S.S. Sazhin (who contributed to the development of the model, analysis of the results and preparation of the text of the paper). Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

month = aug,

day = "20",

doi = "10.1016/j.ijheatmasstransfer.2021.121837",

language = "English",

volume = "181",

journal = "International Journal of Heat and Mass Transfer",

issn = "0017-9310",

}

TY - JOUR

T1 - Temperature measurements in a string of three closely spaced droplets before the start of puffing/micro-explosion

T2 - Experimental results and modelling

AU - Antonov, Dmitry

AU - Volkov, Roman

AU - Fedorenko, Roman

AU - Strizhak, Pavel

AU - Castanet, Gullaume

AU - Sazhin, Sergei

N1 - Funding Information: The authors are grateful: to the National Research Tomsk Polytechnic University (project VIU-ISHFVP-60/2019) which supported P.A. Strizhak (who contributed to the formulation of the problem and analysis of the results) and R.S. Volkov (who contributed to the development of the experimental setup); for scholarships from the President of the Russian Federation (Grants SP-447.2021.1 and MN-7/2260) which supported D. Antonov and R. Fedorenko (who performed the experiments, applied the model to their analysis and prepared the first draft of the paper); to the Universit? de Lorraine and the Institut Carnot Ic?el for the CALICO (Combustion d'A?rosols LIquides Complexes) grant which supported G. Castanet (who contributed to the development of the model, the simulations and preparation of the text of the paper), and to the Russian Science Foundation (Grant 21-19-00876), which supported S.S. Sazhin (who contributed to the development of the model, analysis of the results and preparation of the text of the paper). Funding Information: The authors are grateful: to the National Research Tomsk Polytechnic University (project VIU-ISHFVP-60/2019) which supported P.A. Strizhak (who contributed to the formulation of the problem and analysis of the results) and R.S. Volkov (who contributed to the development of the experimental setup); for scholarships from the President of the Russian Federation (Grants SP-447.2021.1 and MN-7/2260) which supported D. Antonov and R. Fedorenko (who performed the experiments, applied the model to their analysis and prepared the first draft of the paper); to the Université de Lorraine and the Institut Carnot Icéel for the CALICO (Combustion d’Aérosols LIquides Complexes) grant which supported G. Castanet (who contributed to the development of the model, the simulations and preparation of the text of the paper), and to the Russian Science Foundation (Grant 21-19-00876), which supported S.S. Sazhin (who contributed to the development of the model, analysis of the results and preparation of the text of the paper). Publisher Copyright: © 2021 Elsevier Ltd

PY - 2021/8/20

Y1 - 2021/8/20

N2 - The results of experimental and theoretical investigation of the mutual effects of three composite Diesel fuel/water droplets, one behind the other, on their puffing/micro-explosion are presented. The analysis is focused not only on finding the time instant when puffing/micro-explosion starts, but also on the investigation of time evolution of temperature at the water-fuel interface before the development of puffing/micro-explosion. The experimentally observed temperatures at the water-fuel interface are shown to increase almost linearly with time for the lead, middle and downstream droplets. Assuming that puffing/micro-explosion starts when the temperature at this interface reaches the water nucleation temperature, the values of the latter temperature as a function of the heating rate were found from the experimental data. The results are shown to be consistent with the earlier found correlation for this temperature for all three droplets. Time to puffing/micro-explosion is shown to decrease with increasing gas temperature; this time for the lead droplet is always shorter than that of the middle and downstream droplets, and the difference between them decreases as the distance between droplets increases. The experimental results are interpreted in terms of the previously developed model based on the assumption that the water sub-droplet is located exactly in the centre of the Diesel fuel droplet and that this process is triggered when the temperature at the water/fuel interface attains the water nucleation temperature. The effect of interaction between lead, middle and downstream droplets is considered via modifications to the Nusselt (Nu) and Sherwood (Sh) numbers for these droplets due to the interaction between them.

AB - The results of experimental and theoretical investigation of the mutual effects of three composite Diesel fuel/water droplets, one behind the other, on their puffing/micro-explosion are presented. The analysis is focused not only on finding the time instant when puffing/micro-explosion starts, but also on the investigation of time evolution of temperature at the water-fuel interface before the development of puffing/micro-explosion. The experimentally observed temperatures at the water-fuel interface are shown to increase almost linearly with time for the lead, middle and downstream droplets. Assuming that puffing/micro-explosion starts when the temperature at this interface reaches the water nucleation temperature, the values of the latter temperature as a function of the heating rate were found from the experimental data. The results are shown to be consistent with the earlier found correlation for this temperature for all three droplets. Time to puffing/micro-explosion is shown to decrease with increasing gas temperature; this time for the lead droplet is always shorter than that of the middle and downstream droplets, and the difference between them decreases as the distance between droplets increases. The experimental results are interpreted in terms of the previously developed model based on the assumption that the water sub-droplet is located exactly in the centre of the Diesel fuel droplet and that this process is triggered when the temperature at the water/fuel interface attains the water nucleation temperature. The effect of interaction between lead, middle and downstream droplets is considered via modifications to the Nusselt (Nu) and Sherwood (Sh) numbers for these droplets due to the interaction between them.

KW - Composite droplets

KW - puffing

KW - micro-explosion

KW - heating,

KW - evaporation

KW - droplets in a row

KW - Heating

KW - Micro-explosion

KW - Droplets in a row

KW - Evaporation

KW - Puffing

UR - http://www.scopus.com/inward/record.url?scp=85113641833&partnerID=8YFLogxK

U2 - 10.1016/j.ijheatmasstransfer.2021.121837

DO - 10.1016/j.ijheatmasstransfer.2021.121837

M3 - Article

SN - 0017-9310

VL - 181

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

M1 - 121837

ER -

Temperature measurements in a string of three closely spaced droplets before the start of puffing/micro-explosion: Experimental results and modelling

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this