Device and method for studying droplet evaporation and combustion characteristics in turbulent mode

Abstract

The invention discloses a device and a method for studying droplet evaporation and combustion characteristics in a turbulent mode. The device comprises a combustion chamber, a temperature controller,a high speed camera, a data acquisition instrument, a computer, a high pressure gas cylinder and the like. The combustion chamber is an area where droplets complete evaporation or combustion, and is connected to the temperature controller and the computer. The temperature controller controls a current flowing through a heating wire, and then controls a temperature of the combustion chamber. The high speed camera records an evaporation or combustion process of the droplets. The data collector records gas phase temperature changes around the droplets during the combustion process. The high pressure gas cylinder is connected to the combustion chamber and inflates the combustion chamber to achieve high pressure and different atmosphere environments in the combustion chamber. By using the device and the method for studying the droplet evaporation and combustion characteristics in the turbulent mode, the temperature of the combustion chamber can be arbitrarily adjusted and maintained, and turbulent flow and high pressure environments in the combustion chamber can be realized so as to ensure a diversity of experimental variables and accuracy of experimental results.

Description

technical field [0001] The invention belongs to the technical field of combustion experiment equipment, and in particular relates to a device and method for studying the evaporation and combustion characteristics of droplets in a turbulent flow mode. Background technique [0002] Nanofluid fuel is a new type of fuel, which is composed of nanoscale metal particles and liquid hydrocarbon fuel base fluid. Current research shows that the addition of nano-metal particles can not only significantly increase the calorific value of the fuel, but also reduce the ignition delay time and ignition temperature of the fuel to a certain extent, so that the fuel shows great potential for rapid ignition and rapid combustion. However, the addition of nanometals complicates the fuel evaporation and combustion process. In addition, in order to ensure the stable suspension of nano-metal particles in hydrocarbon fuels, surfactants must be added. The addition of surfactants has a great impact on ...

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Problems solved by technology

[0004] At present, the experimental devices used by some scientific research institutions are mainly designed for normal pressure and natural flow conditions. However, the actual use of fuel droplets is mostly in high-pressure and turbulent flow environments, so the test results cannot explain the actual use of droplets. Performance under working conditions

In addition, the equipment used to study evaporation and combustion processes is mostly different. After completing one of the research projects, it needs to be completely dismantled and then re-built a new experimental platform. This process often involves moving high-pressure gas cylinders, which is not only a waste of time, And there is a big security risk

[0005] The Chinese patent application number: 201810377478.4 discloses a fuel droplet ignition temperature measurement device for visualization experiments. The device realizes droplet ignition by heating the ignition wire, but cannot study the temperature of the droplet at a certain fixed temperature. evaporation process

The Chinese patent application number 201810377401.7 discloses an observation droplet evaporation and combustion device. Although it is convenient for observation and photography, it does not involve high pressure and turbulent flow conditions

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