Temperature and velocity fields of the gas-vapor flow near evaporating water droplets

Temperature and velocity fields of the gas-vapor flow near evaporating water droplets

Detalles Bibliográficos
Parent link:International Journal of Thermal Sciences
Vol. 134.— 2018.— [P. 337-354]
Autor Principal: Volkov R. S. Roman Sergeevich
Corporate Authors: Национальный исследовательский Томский политехнический университет Инженерная школа энергетики Научно-образовательный центр И. Н. Бутакова (НОЦ И. Н. Бутакова), Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Outros autores: Kuznetsov G. V. Geny Vladimirovich, Strizhak P. A. Pavel Alexandrovich
Summary:Title screen
Experimental studies of unsteady temperature and velocity fields of the gas-vapor flow in the immediate vicinity of evaporating water droplets were performed in the interests of developing high-temperature (over 300°С) gas-vapor-droplet applications. The formation time of virtually homogeneous (temperature variations of under 2–3°С) temperature fields of evaporating water droplets was established using Particle Image Velocimetry, Laser Induced Phosphorescence, Planar Laser Induced Fluorescence. We observed highly inhomogeneous and unsteady temperature and velocity fields of the gas-vapor mixture and determined the lateral and transversal dimensions of the aerodynamic and thermal traces of evaporating water droplets. The degree of impact of several parameters on the latter was evaluated: initial temperature (20–500?°C) and velocity of the incoming flow (0.5–5?m/s), as well as the initial droplet size (1–2?mm). The role of evaporation and convective heat exchange between a droplet and gases in forming of thermal and aerodynamic trace was analyzed. The heat flow density was found to vary nonlinearly with time (in the immediate vicinity of an evaporating droplet), and the impact of droplet trace temperature and velocity on the heat flow density was evaluated. Both advantages and limitations of the used techniques are established in terms of reliable plotting of unsteady temperature and velocity fields of gas-vapor mixture in the trace of evaporating water droplets, considering the heating lag of the latter.
Режим доступа: по договору с организацией-держателем ресурса
Idioma:inglés
Publicado: 2018
Subjects:
электронный ресурс
труды учёных ТПУ
капля
высокотемпературные газы
трассировка
фосфоресценция
флуоресценция
Acceso en liña:https://doi.org/10.1016/j.ijthermalsci.2018.08.029
Formato: Electrónico Capítulo de libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=658436

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