Ignition of an organic water–coal fuel droplet floating in a heated-air flow; Thermal Engineering; Vol. 64, iss. 1

Ignition of an organic water–coal fuel droplet floating in a heated-air flow; Thermal Engineering; Vol. 64, iss. 1

Bibliographic Details
Parent link:Thermal Engineering
Vol. 64, iss. 1.— 2017.— [P. 53-60]
Corporate Author: Национальный исследовательский Томский политехнический университет (ТПУ) Энергетический институт (ЭНИН) Кафедра автоматизации теплоэнергетических процессов (АТП)
Other Authors: Valiullin T. R. Timur Radisovich, Strizhak P. A. Pavel Alexandrovich, Shevyrev S. A. Sergey Aleksandrovich, Bogomolov A. R. Aleksandr Romanovich
Summary:Title screen
Ignition of an organic water–coal fuel (CWSP) droplet floating in a heated-air flow has been studied experimentally. Rank B2 brown-coal particles with a size of 100 ?m, used crankcase Total oil, water, and a plasticizer were used as the main CWSP components. A dedicated quartz-glass chamber has been designed with inlet and outlet elements made as truncated cones connected via a cylindrical ring. The cones were used to shape an oxidizer flow with a temperature of 500–830 K and a flow velocity of 0.5–5.0 m/s. A technique that uses a coordinate-positioning gear, a nichrome thread, and a cutter element has been developed for discharging CWSP droplets into the working zone of the chamber. Droplets with an initial size of 0.4 to 2.0 mm were used. Conditions have been determined for a droplet to float in the oxidizer flow long enough for the sustainable droplet burning to be initiated. Typical stages and integral ignition characteristics have been established. The integral parameters (ignition-delay times) of the examined processes have been compared to the results of experiments with CWSP droplets suspended on the junction of a quick-response thermocouple. It has been shown that floating fuel droplets ignite much quicker than the ones that sit still on the thermocouple due to rotation of an CWSP droplet in the oxidizer flow, more uniform heating of the droplet, and lack of heat drainage towards the droplet center. High-speed video recording of the peculiarities of floatation of a burning fuel droplet makes it possible to complement the existing models of water–coal fuel burning. The results can be used for a more substantiated modeling of furnace CWSP burning with the ANSYS, Fluent, and Sigma-Flow software packages.
Режим доступа: по договору с организацией-держателем ресурса
Language:English
Published: 2017
Subjects:
электронный ресурс
труды учёных ТПУ
топливо
суспензии
капли
частицы
флотация
зажигание
Online Access:http://dx.doi.org/10.1134/S0040601517010098
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=654495

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