A high-pressure gas generating device and a high-pressure and accurate combustion characteristic testing system

Abstract

The invention discloses a high-pressure gas generating device and a high-pressure and accurate combustion characteristic testing system, and relates to the field of research and testing devices for fuel premixed combustion characteristics, wherein the high-pressure gas generating device includes a casing, a high-pressure cylinder, a piston device and a purification device, and a piston The device is equipped with a leather cup that can reciprocate in the high-pressure cylinder. Through the reciprocating movement of the cup, the actual atmosphere can be directly pressurized into high-pressure gas. A cooling device is installed inside the high-pressure cylinder and the shell, combined with a purification device It can directly produce high-pressure clean and high-pressure gas with suitable temperature to meet the experimental requirements of fuel premixing characteristics research. The high-pressure and accurate combustion characteristics testing system includes a bomb containing bomb, a high-pressure air intake system, a gas fuel intake system and a liquid fuel intake system, which can realize blending experiments of various gas fuels and liquid fuels. The high-pressure air intake system includes the above-mentioned high-pressure gas generating device, which can provide higher and more stable initial pressure for premixed combustion.

Description

technical field [0001] The invention relates to the field of fuel premixed combustion characteristic research and testing devices, in particular to a high-pressure gas generator and a high-pressure and accurate combustion characteristic testing system. Background technique [0002] Fuels (such as hydrogen, methane, acetylene, gasoline, etc.) are the cornerstone of social development and an important source of energy in human production and life. Understanding the premixed combustion characteristics of various fuels is crucial to how to better apply or control combustion . For example, on the basis of fully grasping the combustion characteristics of fuel, controlling and optimizing the combustion process can improve the power performance and fuel economy of internal combustion engines, and control the emission of pollutants. [0003] When studying the premixed combustion characteristics of fuel, the stoichiometric ratio at the initial moment, the initial pressure, the initia...

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Problems solved by technology

[0005] First, the partial pressure method is still used in the air distribution process, and the air intake is usually controlled manually through a needle valve. It is difficult to accurately control the air intake during the experiment, causing experimental errors and affecting the accuracy of the experimental results; especially When conducting high-pressure experiments, there is a great potential safety hazard for the experimenters who control the intake air

[0006] Second, because the pressure upper limit of ordinary air compressors is low, N2 and O2 high-pressure mixed gas cylinders are generally used to supply gas during high-pressure experiments. In fact, in this mixed gas cylinder, due to the filling process and the filling gas Changes in purity lead to changes in the ratio of the final synthesis gas, resulting in an unstable ratio of nitrogen and oxygen in the mixed gas, which greatly interferes with the accuracy of the experiment; Due to the pressure change, temperature change and other influencing factors in the gas distribution process, there will be a proportional error in the final mixture, which will affect the accuracy of the experimental results.

In addition, in the form of gas supply from this mixed gas cylinder, the gas used in the experiment is actually artificial synthetic air, which is different from the actual atmospheric composition, which will cause the results of the constant volume incendiary bomb simulation research to not fully represent The actual combustion performance of the fuel in the internal combustion engine; at the same time, because the high-pressure experiment consumes a lot of air, the use of gas cylinders will make the experiment cost higher

[0007] Third, in the actual experiment, the intake air volume of different molecular weight fuels under the same working conditions is very different. The volume ratio is about 6.67, that is, the required intake pressure ratio is as high as 6.67. The constant volume combustion test device in the prior art lacks corresponding considerations when performing gas distribution, and it is difficult to achieve accurate gas distribution in fact, which affects the experiment. accuracy of results

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