Experimental Determination of Conditions for the Explosive Fragmentation of a Heterogeneous Water Droplet in Heating in a High-Temperature Gas Medium

Experimental Determination of Conditions for the Explosive Fragmentation of a Heterogeneous Water Droplet in Heating in a High-Temperature Gas Medium

Bibliographische Detailangaben
Parent link:Journal of Engineering Physics and Thermophysics
Vol. 90, iss. 3.— 2017.— [P. 625-633]
1. Verfasser: Kuznetsov G. V. Geny Vladimirovich
Körperschaften: Национальный исследовательский Томский политехнический университет (ТПУ) Энергетический институт (ЭНИН) Кафедра автоматизации теплоэнергетических процессов (АТП), Национальный исследовательский Томский политехнический университет (ТПУ) Энергетический институт (ЭНИН) Кафедра теоретической и промышленной теплотехники (ТПТ)
Weitere Verfasser: Piskunov M. V. Maksim Vladimirovich, Strizhak P. A. Pavel Alexandrovich
Zusammenfassung:Title screen
An experimental study has been made of the processes of warming up, evaporation, and boiling of a heterogeneous (with a solid graphite particle) droplet of water in a flow of high-temperature (500–800 K) combustion products. The mechanism of explosive fragmentation (breakup) of the heterogeneous droplet with enhancement of vaporization on internal interfaces (during the nucleation of vapour bubbles at the graphite-particle surface) has been established. The characteristic times of heating of the heterogeneous droplet (2.5–4 mm in size) with an inclusion (in the shape of a cylindrical disk of diameter and height 2 mm) to explosive-fragmentation conditions have been determined. The times of complete evaporation of a liquid film from the inclusion during the implementation of the process of vaporization from the free exterior surface of the droplet have also been given. A significant difference of the conditions and characteristics of the investigated processes from the "graphite substrate–water droplet" system has been shown. Conditions under which the controlling share of heat to internal interfaces of the heterogeneous droplet is supplied through the liquid film or the inclusion have been determined.
Режим доступа: по договору с организацией-держателем ресурса
Veröffentlicht: 2017
Schlagworte:
электронный ресурс
труды учёных ТПУ
высокотемпературные газы
капли
вода
испарение
high-temperature gases
water
droplet
group of droplets
evaporation
Online-Zugang:http://dx.doi.org/10.1007/s10891-017-1608-8
Format: Elektronisch Buchkapitel
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=655130

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