Experimental study on interaction of water mist spray with high-velocity gas jet

Zhu, Paikun; Wang, X.S.; Li, G.C.; Liu, Yangpeng; Kong, Xiangxiao; Huang, Yuanqing; Zhao, Xiang Di; Yuan, Jingjie

doi:10.1016/j.firesaf.2017.08.005

Cited by 16 publications

(3 citation statements)

References 24 publications

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“…Most notably, the experiment did not allow quantification of spray concentrations and only provided approximate values of wetted areas. Advanced methods are available for rigorously validating nozzle properties such as direct image correlation (Take, 2015) and particle image velocimetry (Zhu et al, 2017) but these require specialised tools not available to the authors at the time of performing the study. Nonetheless, for the purposes of guiding the preliminary design of the PSC, the low-cost experimental approach used in this study was useful for validating general flow behaviour of the nozzle.…”

Section: Limitations and Future Workmentioning

confidence: 99%

Design of a Smart Prefabricated Sanitising Chamber for Covid-19 Using Computational Fluid Dynamics

Abu-Zidan

Nguyen

Mendis

et al. 2021

Journal of Civil Engineering and Management

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The novel coronavirus (SARS-CoV-2) has spread at an unprecedented rate, resulting in a global pandemic (COVID-19) that has strained healthcare systems and claimed many lives. Front-line healthcare workers are among the most at risk of contracting and spreading the virus due to close contact with infected patients and settings of high viral loads. To provide these workers with an extra layer of protection, the authors propose a low-cost, prefabricated, and portable sanitising chamber that sprays individuals with sanitising fluid to disinfect clothing and external surfaces on their person. The study discusses computer-aided design of the chamber to improve uniformity of sanitiser deposition and reduce discomfort due to excessive moisture. Advanced computational fluid dynamics is used to simulate the dispersion and deposition of spray particle, and the resulting wetting pattern on the treated person is used to optimise the chamber design.

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Section: Limitations and Future Workmentioning

confidence: 99%

Design of a Smart Prefabricated Sanitising Chamber for Covid-19 Using Computational Fluid Dynamics

Abu-Zidan

Nguyen

Mendis

et al. 2021

Journal of Civil Engineering and Management

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“…It can reduce the explosion overpressure by about 78%, while the blast wave propagation velocity was reduced about 55%. Furthermore, the spray coverage of water mist, which has droplet sizes of 50-150 mm, has a better suppression effect on gas diffusion, 22 and reduces the flame length generated by a gas explosion. 23 In addition, Roosendans et al 24 increased the potassium carbonate concentration in water and found that flame velocity and explosion overpressure mitigation occurred.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of propane explosion with applied water mist

Chen

Weng

et al. 2021

Journal of Fire Sciences

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This article discusses the overpressure of a gas explosion and the performance of applying water mist for explosion suppression. According to the experimental results, the larger the opening area, the more difficult it is for pressure to accumulate, resulting in lower overpressure of a gas explosion. When the opening was opened under a high air speed environment, the amount of entrained air was greater. Consequently, the occurrence time of the explosion was shorter than at a low air speed. Despite the water mist nozzle being installed outside the enclosure, a propane gas explosion still occurred regardless of the amount of water mist used, failing to suppress the explosion. However, the water mist nozzle installed inside the enclosure supplied an adequate amount of water mist that could wash a part of the propane, resulting in the fuel concentration dropping below the lower explosion limit, hindering the occurrence of an explosion.

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“…The atomizing nozzle was developed in the automotive internal combustion engine industry, and it was introduced to other industries as people acquired increasing knowledge of spray characteristics. Zhang et al 12 performed numerical simulations on air-atomizing nozzles in an oil field; Meroney 13 conducted numerical simulations on the water spray interaction with dense gas plumes; Fabiano et al 14 presented experimental and theoretical investigations on liquid spray curtains, in the context of absorbing and dispersing hazardous gaseous releases; Sun et al 15 used numerical simulation tools to analyze the deposition characteristics of droplets; Zhu et al 16 conducted a series of small-scale experiments by means of a two-dimensional (2D) particle image velocimetry technique to address the lack of understanding of the dynamical behaviors and interacting mechanisms between water mist spray and high-velocity leakage gas jets. In recent years, sprays have been introduced to reduce dust.…”

Section: Introductionmentioning

confidence: 99%

Study on Parameters of a New Gas–Water Spray in Ore Pass Dedusting Based on Experiment and Numerical Simulation

Wang

Jiang

et al. 2020

ACS Omega

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To solve the problem of ore unloading dust in ore pass crosscuts, the atomization characteristics of a new gas–water spray and the effect of the ore discharge airflow on the spray effect were studied by experiments, and the installation position of the spray nozzle in the crosscut was determined by numerical simulation. The results show that when the gas–water flow ratio is 100–150, the atomization effect is the best. In this situation, the droplet size can be less than 28 μm. The impact airflow induced by ore unloading has a great influence on the size of the spray droplets, and the dust-collecting ability of the spray is negatively correlated with the impinging airflow. The best location for the spray is 5 m away from the wellhead. At this position, the impact airflow is less than 1.5 m/s, which can ensure that the total dustfall rate of the gas–water spray is 67% and that of the respiratory dust is 34%.

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Experimental study on interaction of water mist spray with high-velocity gas jet

Cited by 16 publications

References 24 publications

Design of a Smart Prefabricated Sanitising Chamber for Covid-19 Using Computational Fluid Dynamics

Design of a Smart Prefabricated Sanitising Chamber for Covid-19 Using Computational Fluid Dynamics

Evaluation of propane explosion with applied water mist

Study on Parameters of a New Gas–Water Spray in Ore Pass Dedusting Based on Experiment and Numerical Simulation

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