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Pipeline system for directly observing influence of nanoparticles on detonation limit

A technology of nano-particles and pipeline systems, which is applied in the field of detonation tests, can solve the problems of unclear detonation attenuation and achieve good sealing effect

Active Publication Date: 2020-02-21
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

However, the attenuation effect of the physical properties, concentration, diameter, and distribution of nanoparticles on detonation is still unclear, and whether the existing failure criteria are still applicable under the influence of nanoparticles, and the suppression mechanism of nanoparticles for detonation still needs to be investigated. further analysis

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  • Pipeline system for directly observing influence of nanoparticles on detonation limit

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Embodiment Construction

[0014] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0015] The invention provides a piping system for directly observing the effect of nanoparticles on the detonation limit.

[0016] Such as figure 1 As shown, the system includes a high-voltage ignition system 2, a high-speed camera 3, a shading sheet 4, a convex lens 5, a concave mirror 6, a data box 7, a digital display recorder 8, a sensor 9, an observation window 10, a magnetic bead blowing device 11, A magnetic field generating system 12, a parallel light source 13 and a detonation tube 14, the front end of the detonation tube 14 is a premixed gas inlet 1, a high-voltage ignition system 2 is installed at the premixed gas inlet 1, and a sensor 9 and a sensor 9 are installed on the opening of the detonation tube 14 The data box 7 is connected to the d...

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Abstract

The invention provides a pipeline system for directly observing an influence of nanoparticles on a detonation limit. The pipeline system belongs to the technical field of detonation tests, and comprises a high-pressure ignition system, a data box, a digital display recorder, a sensor, an observation window, a magnetic bead blowing-in device, a magnetic field generation system and a detonation tube, wherein a premixed gas inlet is formed in the left side of the detonation pipe, the high-pressure ignition system is arranged at the premixed gas inlet, the sensor is installed on an opening in thedetonation pipe and connected with the digital display recorder by means of the data box, the observation window is formed in the side surface of the detonation pipe, a detonation wave structure can be directly observed by adopting a schlieren method, and the magnetic bead blowing-in device is arranged at the lower portion of the detonation pipe and connected with the magnetic field generation system. The pipeline system can measure a detonation wave propagation speed and an instantaneous pressure peak value of the nanoparticles under a near-limit condition and record the detonation wave structure.

Description

technical field [0001] The invention relates to the technical field of detonation tests, in particular to a pipeline system for directly observing the influence of nanoparticles on the detonation limit. Background technique [0002] The self-sustained combustion characteristics of detonation waves have brought serious explosion-proof safety problems to many flammable gas places, so it is of great significance to study the propagation mechanism of detonation. Boundary conditions have an influence on the detonation, and the detonation wave can reach 0.8V when it is far from the critical limit. CJ Above velocities propagate steadily, and a sudden velocity drop is usually observed as the detonation limit is approached. The reason why the detonation attenuates in the non-smooth tube is that the boundary has a weakening effect on the shear wave, and the influence of the shear wave on the self-sustained propagation of the detonation cannot be ignored. In practice, the detonation ...

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Application Information

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IPC IPC(8): G01N31/12
CPCG01N31/12
Inventor 赵焕娟严屹然董士铭牛淑贞张英华高玉坤黄志安张志博
Owner UNIV OF SCI & TECH BEIJING
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