In this research, we obtain gas–vapor mixture temperature fields generated by blending droplets and high-temperature combustion products. Similar experiments are conducted for droplet injection into heated air flow. This kind of measurement is essential for high-temperature and high-speed processes in contact heat exchangers or in liquid treatment chambers, as well as in firefighting systems. Experiments are conducted using an optical system based on Laser-Induced Phosphorescence as well as two types of thermocouples with a similar measurement range but different response times (0.1–3 s) and accuracy (1–5 °C). In our experiments, we inject droplets into the heated air flow (first scheme) and into the flow of high-temperature combustion products (second scheme). We concentrate on the unsteady inhomogeneous temperature fields of the gas–vapor mixture produced by blending the above-mentioned flows and monitoring the lifetime of the relatively low gas temperature after droplets passes through the observation area. The scientific novelty of this research comes from the first ever comparison of the temperature measurements of a gas–vapor–droplet mixture obtained by contact and non-contact systems. The advantages and limitations of the contact and non-contact techniques are defined for the measurement of gas–vapor mixture temperature.

Thermocouple

10.3390/app10072212

Cite

Citations (8)

Differences in the ignition characteristics of coal–water slurries and composite liquid fuel

Solid Fuel Chemistry (2016)

Ksenia Vershinina Dmitrii O. Glushkov Г. В. Кузнецов П. А. Стрижак

Coal water

Inert

Liquid fuel

10.3103/s0361521916020117

Cite

Citations (34)

Ignition of a metallized composite solid propellant by a group of hot particles

Combustion Explosion and Shock Waves (2016)

Dmitrii O. Glushkov Г. В. Кузнецов П. А. Стрижак

Ammonium perchlorate

Particle (ecology)

Autoignition temperature

10.1134/s0010508216060095

Cite

Citations (3)

Differences of two-component droplets breakup at the high temperatures

Journal of the Energy Institute (2019)

Д.В. Антонов Г. В. Кузнецов П. А. Стрижак

Weber number

10.1016/j.joei.2019.02.005

Cite

Citations (16)

Modeling of a Double Gas Hydrate Particle Ignition

Applied Sciences (2022)

Olga Gaidukova S.Y. Misyura Dmitrii Razumov П. А. Стрижак

This paper presents the numerical research findings for the conditions and characteristics of methane-propane hydrate particle ignition. The curves of the ignition delay times of a hydrate particle versus its size and ambient temperature were obtained. The effect of the rates of phase transformations (evaporation and dissociation) on the hydrate particle ignition behavior was analyzed. Following the mathematical modeling of the processes under study using different heating schemes of gas hydrates, the patterns of processes developing in a particle during the induction period were identified. It was established that the ignition behavior of methane, propane, and other gases was significantly different from that of other gases produced from hydrate decomposition. The established differences form the basis for predicting the characteristics of gas hydrate ignition at different power plants.

Clathrate hydrate

Propane

Particle (ecology)

10.3390/app12125953

Cite

Citations (10)

Smoke deposition and extraction in compartment fires with different ignition sources

Process Safety and Environmental Protection (2024)

Г. В. Кузнецов А. О. Жданова Р. С. Волков A.S. Sviridenko П. А. Стрижак

Compartment (ship)

Deposition

10.1016/j.psep.2024.05.010

Cite

Citations (0)

Research of the thermal contact conditions influence on the results of superficial thermocouples measurements

St Petersburg State Polytechnical University Journal (2015)

Yuliana K. Atroshenko Irina P. Ozerova П. А. Стрижак

В работе приведены результаты численных исследований процессов теплопереноса в системе «измеряемая среда -поверхностный термоэлектрический преобразователь».С помощью разработанной модели теплопереноса выполнено исследование влияния на результаты измерений величины воздушного зазора между термоэлектрическим преобразователем и поверхностью тела, температура которого измеряется.Показано, что величина воздушного зазора оказывает существенное влияние на необходимую продолжительность нагрева чувствительного элемента (минимальное время измерений).Установлены предельно допустимые значения величин этих

Thermocouple

10.5862/jest.214.11

Cite

Citations (2)