Determination of temperature and concentration of a vapor–gas mixture in a wake of water droplets moving through combustion products

Determination of temperature and concentration of a vapor–gas mixture in a wake of water droplets moving through combustion products

Détails bibliographiques
Parent link:Journal of Engineering Thermophysics.— , 1991-
Vol. 25, iss. 3.— 2016.— [P. 337–351]
Auteur principal: Antonov D. V. Dmitry Vladimirovich
Collectivités auteurs: Национальный исследовательский Томский политехнический университет Энергетический институт Кафедра теоретической и промышленной теплотехники, Национальный исследовательский Томский политехнический университет Энергетический институт Кафедра автоматизации теплоэнергетических процессов
Autres auteurs: Kuznetsov G. V. Geny Vladimirovich, Strizhak P. A. Pavel Alexandrovich
Résumé:Title screen
Characteristic temperatures and concentrations of a vapor–gas mixture in a wake of water droplets moving through combustion products (initial temperature 1170 K) were determined using the Ansys Fluent mathematical modeling package. We investigated two variants of motion: motion of two droplets (with sizes from 1 mm to 3 mm), consecutive and parallel, and motion of five staggered droplets. The influence of the relative position of droplets and also of distances between them (varied from 0.01 mm to 5 mm) on temperatures and concentrations of water vapor was established. The distances determine the relation between the evaporation areas and the total volume occupied by a droplet aggregate in the gas medium. The results of modeling for conditions that take into account vaporization on the droplet surface at average constant values of evaporation rate and also with consideration of the change in the latter, depending on the droplet temperature field, are compared. We determined conditions under which the modeling results are comparable for the assumption of a constant vaporization rate and with regard to the dependence of the latter on temperature. The earlier hypothesis on formation of a buffer vapor layer (“thermal protection”) around a droplet, which decreases the thermal flow from the external gas medium, was validated.
Langue:anglais
Publié: 2016
Sujets:
электронный ресурс
труды учёных ТПУ
Accès en ligne:http://dx.doi.org/10.1134/S1810232816030048
Format: Électronique Chapitre de livre
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=650231

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