Investigation of the mobile impulse hydraulic and pneumatic fire fighting device for extinguishing small-scale fires

Vladimiras Suslavičius

Doctoral dissertation

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Technological sciences, transport engineering (03T)

The dissertation investigates the problems of supplying fire-extinguishing fluids for extiguishing small-scale fires. The research objects include extinguishing fluid (water) transportation by technological devices using the compressed air power and ensuring the efficiency of using the water for liquidating the initial ignition spots, and the dynamic and hydrodynamic processes. These devices play an important role in controlling fire outbreaks with much less extinguishing media than the resources required to control big-scale fires. The analysis of the processes and the investigation peformed allows us to choose suitable technical characteristics for technological equipment, which could be used not only by fire and rescue services, but also be applied for fire protection in various means of transport, e.g. ships, rail transport, flying apparatuses and military and special vehicles. The primary purpose of this dissertation is to create the mathematical models that describe the ongoing dynamic and hydrodynamic processes, allowing us to determine the required phisycal parameters of the devices. The dissertation also aims to determine the parameters of water for extinguishing sprays.

The approaches used in the work serve the following major tasks: to define the parameters of the atomized water suitable for extinguishing small-scale fires, to construct the mathematical models of the hydraulic and pneumatic impulse extinguisher and to create a dynamic model of the firefighting device with the new features.

In the dissertation, the main drawbacks of the currently used technological devices and the research carried out to eliminate them are described. The main parameters of the atomized water transported through these fire extinguishing devices are determined. The developed mathematical models allow us to analyse the ongoing dynamic and hydrodynamic processes. Taking into account the drawbacks of the available hydraulic and pneumatic extinguishers and based on the results of the performed experimental research, the author offered the device model with new characteristics and developed a mathematical model of its operation This allows the device to be used for the intended purpose and to increase fire extinguishing efficiency, decreasing a harmful effect on the user.

Based on the research data and the developed mathematical models described in the dissertation, it is also possible to create extinguishing devices, using the compressed air for water transportation to the site of the fire. They may change fire-extinguishing systems currently found in various transport facilities, which use the materials producing a harmful effect on the environment.

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160×230 mm
134 p.
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