CN-121994620-A - Detachable multiphase medium explosion flame flow field testing device and method

CN121994620ACN 121994620 ACN121994620 ACN 121994620ACN-121994620-A

Abstract

The invention discloses a detachable multiphase medium explosion flame flow field testing device and method, comprising a driving section, an observing section, a driven section and/or a bent pipe section, wherein a supporting and moving module is arranged at the bottoms of the driving section, the observing section, the driven section and the bent pipe section and used for supporting and moving each section, an ignition flange is arranged at the starting end of the combined testing device, a flange blind plate is arranged at the tail end of the combined testing device, an explosion-proof membrane is arranged between each section, an ignition electrode is arranged on the ignition flange and used for igniting a combustible medium at the starting end, the driving section is used for filling combustible gas, the driven section and the bent pipe section are used for filling combustible solid/liquid, a plurality of testing holes and observing windows are arranged on the driving section, the driven section and the bent pipe section and are respectively used for pressure monitoring positions and image monitoring to obtain flame front propagation time so as to obtain flame front speed, and the observing section is used for monitoring and acquiring flame flow field changes. The invention can clearly and intuitively record the propagation condition of the flame flow field.

Inventors

Zong Shizeng
LI SHUO
XIONG XINYU

Assignees

南京理工大学

Dates

Publication Date: 20260508
Application Date: 20260305

Claims (8)

1. The detachable multiphase medium explosion flame flow field testing device is characterized by comprising a driving section, an observation section, a driven section and/or a bent section; the bottom of the driving section, the observing section, the driven section and the bent pipe section is provided with a supporting and moving module for supporting and moving each section to fulfill different testing purposes; The starting end of the combined testing device is provided with an ignition flange, and the tail end of the combined testing device is provided with a flange blind plate for creating a closed environment for the multiphase medium; the ignition flange is provided with an ignition electrode for igniting the combustible medium at the starting end; the driving section is used for filling combustible gas, and the driven section and the bent section are used for filling combustible solid/liquid; The driving section, the driven section and the bent pipe section are provided with a plurality of test holes and observation windows which are respectively used as pressure monitoring positions and image monitoring to obtain the propagation time of the flame front so as to obtain the flame front speed; The observation section is used for monitoring and acquiring flame flow field changes.
2. The detachable multiphase medium explosion flame flow field testing device according to claim 1 is characterized by comprising a driving section, an observation section, a driven section and a bent section which are sequentially connected to obtain flame front speed change and explosion internal pressure change, wherein the driving section, the observation section and the driven section are sequentially connected to complete a multiphase medium explosion flame flow field change process and a pressure-time curve in a closed container, and the driving section, the bent section and the observation section are sequentially connected to obtain the influence of limited space change on the flame flow field when the multiphase medium explodes.
3. The detachable multi-phase medium explosion flame flow field testing device according to claim 1, wherein a sensor base is arranged on the testing hole and is used for being connected with a pressure sensor.
4. The removable multi-phase medium explosion flame flow field testing device of claim 1, wherein the test holes are disposed axially with the corresponding segments.
5. The detachable multi-phase medium explosion flame flow field testing device according to claim 1, wherein a square glass window is arranged at the observation section.
6. The detachable multiphase medium explosion flame flow field testing device according to claim 1, wherein the driving section is provided with a ball valve for injecting combustible gas, and a pressure gauge for controlling the ratio of the combustible gas to be injected.
7. A method of multi-phase medium detonation flame flow field testing utilizing the removable multi-phase medium detonation flame flow field testing device of any of claims 1-6, comprising: connecting the sections according to the test requirement, and placing the explosion-proof membrane; filling the driving section with combustible gas, and filling other sections with combustible solid/liquid according to the requirement; the ignition at the driving section is completed by the ignition electrode, Shooting the change condition of the flame flow field through an observation window and an observation section; monitoring pressure change conditions at different positions in the device and the time for a flame front to propagate to different observation windows; the flame flow field is influenced by the evolution condition of the flame flow field of the camera, the pressure-time curve and the limited space bending.
8. The method of testing a multi-phase medium explosion flame flow field according to claim 7, wherein the flame front speed calculation method is as follows: ; Wherein, the The velocity of the flame front, T is the time difference between propagation of the flame front to the adjacent two viewing windows, which is the distance between the adjacent two viewing windows.

Description

Detachable multiphase medium explosion flame flow field testing device and method Technical Field The invention relates to the field of explosion and impact dynamics tests, in particular to a detachable multiphase medium explosion flame flow field testing device and method. Background Aiming at the explosion characteristics of multiphase medium mixture, different explosion pressures can be generated by the reaction of different combustible medium proportions, and the differences of the explosion characteristics can be caused by different ignition environments and different combustible medium contents. In addition, the explosion-limited space and the whole environment structure are reasonably controlled, and the flame front propagation speed in the multi-phase medium explosion process can be adjusted, so that the generation and development of explosion pressure are effectively weakened. Therefore, the multiphase combustible medium explosion under the environments of different limited space mutation and flame propagation structure mutation needs to be systematically researched, the pressure change characteristics are researched, and the flame propagation rule is observed. The existing researches focus on simplifying conditions, and the systematic exploration of the blasting behavior of the multiphase medium under the complex working condition is still lacking. Disclosure of Invention The invention aims to provide a detachable multiphase medium explosion flame flow field testing device and method, so as to clearly and intuitively record the propagation condition of a flame flow field, the flame front speed change and the internal pressure change condition of an explosion system, and the device is used for completing the combination of different mediums, limiting the influence of space change on the explosion characteristics of a hybrid, and solving the problems in the background technology. The technical solution for realizing the purpose of the invention is as follows: a detachable multiphase medium explosion flame flow field testing device comprises a driving section, an observation section, a driven section and/or a bent section; the bottom of the driving section, the observing section, the driven section and the bent pipe section is provided with a supporting and moving module for supporting and moving each section to fulfill different testing purposes; The starting end of the combined testing device is provided with an ignition flange, and the tail end of the combined testing device is provided with a flange blind plate for creating a closed environment for the multiphase medium; the ignition flange is provided with an ignition electrode for igniting the combustible medium at the starting end; the driving section is used for filling combustible gas, and the driven section and the bent section are used for filling combustible solid/liquid; The driving section, the driven section and the bent pipe section are provided with a plurality of test holes and observation windows which are respectively used as pressure monitoring positions and image monitoring to obtain the propagation time of the flame front so as to obtain the flame front speed; the observation section is used for monitoring and acquiring flame flow field changes. Compared with the prior art, the invention has the remarkable advantages that: The invention can be used for developing flame-explosion experiments of different combustible media by changing the flame flow field evolution law of the explosion of the multiphase media through the mutually communicated and detachable different types of test sections and changing the limited space, is convenient for cleaning the environment in the tube by the multifunctional detachable device, is convenient for test personnel to use, is convenient for the ignition electrode to be arranged at the center of the front end of the driving section and is used for completing the ignition operation of the combustible media, separates the combustible media from the combustible solid/liquid by the devices such as an explosion-proof diaphragm, a flange blind plate and the like, and can be used for exploring the influence of shock waves on the heterogeneous media sundries during secondary explosion and exploring the specific influence of the limited space abnormal shapes such as an elbow, a straight tube and the like on the flame change and exploring the dynamic flow field evolution process and the coupling mechanism thereof during the multi-phase medium flame-explosion by recording the flame propagation path and the flame front speed change. Drawings The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings: FIG. 1 is a schematic diagram of