Planar laser-induced fluorescence diagnostics of water droplets heating and evaporation at high-temperature; Applied Thermal Engineering; Vol. 127
| Parent link: | Applied Thermal Engineering Vol. 127.— 2017.— [P. 141-156] |
|---|---|
| Main Author: | |
| Corporate Author: | |
| Other Authors: | |
| Summary: | Title screen Gas-steam-droplet technologies are widely used in systems operating at high temperatures ranging between 400 and 2000 C, namely: fire-fighting systems, thermal fluid cleaning, fuel compounding, industrial waste gasification and evaporation systems for advanced fuel components, cleaning of thermally loaded surfaces of power equipment, etc. System parameters are usually selected empirically via multiple tests and continuous trial operation of appropriate units, aggregates, assemblies, and installations. This situation is caused by insufficient basic knowledge of conditions and parameters of hightemperature (over 500 C) heating and evaporation of water and water-based emulsions, solutions, and slurries. Limited information is available regarding the evaporation rates dependent on the temperature of gaseous medium. Consequently, the up-to-date evaporation models allow the researchers to achieve adequate values (in good agreement with the experiment) of evaporation rates at air temperatures not exceeding 300-400 C. The paper presents a set of experiments on water droplets with the size ranging from 1 to 2 mm, which is used to create the information database on high-temperature evaporation parameters. The approach to measuring the evaporation rate involves observation of the droplet size or more exactly its mean radius, and recording the time of its existence. A high-speed video camera and Tema Automotive software with different tracking algorithms are used for experimental observations. During gas heating, the distribution of highly non-homogeneous and non-steady temperature field in evaporating water droplets is detected by the hardware and software cross-correlation system and Planar Laser-induced Fluorescence optical diagnostics. Instantaneous and medium evaporation rates are computed for the whole period of the droplet lifetime. Highly nonlinear evaporation rate dependences are suggested for gas temperatures and the water droplet surface, size, and time of gas heating. Режим доступа: по договору с организацией-держателем ресурса |
| Language: | English |
| Published: |
2017
|
| Subjects: | |
| Online Access: | https://doi.org/10.1016/j.applthermaleng.2017.08.040 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=655519 |
MARC
| LEADER | 00000naa0a2200000 4500 | ||
|---|---|---|---|
| 001 | 655519 | ||
| 005 | 20250319134314.0 | ||
| 035 | |a (RuTPU)RU\TPU\network\21702 | ||
| 090 | |a 655519 | ||
| 100 | |a 20170908d2017 k||y0rusy50 ba | ||
| 101 | 0 | |a eng | |
| 135 | |a drcn ---uucaa | ||
| 181 | 0 | |a i | |
| 182 | 0 | |a b | |
| 200 | 1 | |a Planar laser-induced fluorescence diagnostics of water droplets heating and evaporation at high-temperature |f R. S. Volkov, P. A. Strizhak | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: p. 156 (40 tit.)] | ||
| 330 | |a Gas-steam-droplet technologies are widely used in systems operating at high temperatures ranging between 400 and 2000 C, namely: fire-fighting systems, thermal fluid cleaning, fuel compounding, industrial waste gasification and evaporation systems for advanced fuel components, cleaning of thermally loaded surfaces of power equipment, etc. System parameters are usually selected empirically via multiple tests and continuous trial operation of appropriate units, aggregates, assemblies, and installations. This situation is caused by insufficient basic knowledge of conditions and parameters of hightemperature (over 500 C) heating and evaporation of water and water-based emulsions, solutions, and slurries. Limited information is available regarding the evaporation rates dependent on the temperature of gaseous medium. Consequently, the up-to-date evaporation models allow the researchers to achieve adequate values (in good agreement with the experiment) of evaporation rates at air temperatures not exceeding 300-400 C. The paper presents a set of experiments on water droplets with the size ranging from 1 to 2 mm, which is used to create the information database on high-temperature evaporation parameters. The approach to measuring the evaporation rate involves observation of the droplet size or more exactly its mean radius, and recording the time of its existence. A high-speed video camera and Tema Automotive software with different tracking algorithms are used for experimental observations. During gas heating, the distribution of highly non-homogeneous and non-steady temperature field in evaporating water droplets is detected by the hardware and software cross-correlation system and Planar Laser-induced Fluorescence optical diagnostics. Instantaneous and medium evaporation rates are computed for the whole period of the droplet lifetime. Highly nonlinear evaporation rate dependences are suggested for gas temperatures and the water droplet surface, size, and time of gas heating. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Applied Thermal Engineering | ||
| 463 | |t Vol. 127 |v [P. 141-156] |d 2017 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a high-temperature gases | |
| 610 | 1 | |a water droplet | |
| 610 | 1 | |a evaporation rate | |
| 610 | 1 | |a non-homogeneous and non-steady temperature field | |
| 610 | 1 | |a planar laser-induced fluorescence | |
| 610 | 1 | |a высокотемпературные газы | |
| 610 | 1 | |a капли | |
| 610 | 1 | |a воды | |
| 610 | 1 | |a испарение | |
| 610 | 1 | |a температурные поля | |
| 610 | 1 | |a флуоресценция | |
| 700 | 1 | |a Volkov |b R. S. |c specialist in the field of power engineering |c Associate Professor of the Tomsk Polytechnic University, candidate of technical Sciences |f 1987- |g Roman Sergeevich |3 (RuTPU)RU\TPU\pers\33926 |9 17499 | |
| 701 | 1 | |a Strizhak |b P. A. |c Specialist in the field of heat power energy |c Doctor of Physical and Mathematical Sciences (DSc), Professor of Tomsk Polytechnic University (TPU) |f 1985- |g Pavel Alexandrovich |3 (RuTPU)RU\TPU\pers\30871 |9 15117 | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет (ТПУ) |b Энергетический институт (ЭНИН) |b Кафедра автоматизации теплоэнергетических процессов (АТП) |3 (RuTPU)RU\TPU\col\18678 |
| 801 | 2 | |a RU |b 63413507 |c 20170908 |g RCR | |
| 856 | 4 | |u https://doi.org/10.1016/j.applthermaleng.2017.08.040 | |
| 942 | |c CF | ||