Shock wave converging device for chemical shock tube, and chemical shock tube

By designing a shock wave converging device, the incident shock wave is converted into a parallel shock wave, which solves the problem of insufficient shock wave intensity in the shock tube, realizes constant pressure zone measurement in chemical reaction kinetics research, and improves the accuracy and reliability of data measurement.

WO2026137130A1PCT designated stage Publication Date: 2026-07-02TIANJIN UNIV
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
TIANJIN UNIV
Filing Date
2024-12-23
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Existing technologies are difficult to generate strong shock waves in shock tubes and are costly, and traditional methods cannot provide a constant pressure zone for combustion characteristic determination in chemical reaction kinetics studies.

Method used

Design a shock wave converging device, including a first conversion tube, an inclined straight tube, and a second conversion tube, to convert the incident shock wave into a parallel shock wave through different curved surface configurations, ensuring the formation of a constant pressure zone within the test section and enhancing the shock wave intensity.

Benefits of technology

This achieved enhanced shock wave intensity and created a constant pressure zone within the test section, improving the accuracy and reliability of pressure measurement and exceeding the theoretical value of traditional shock tubes.

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Abstract

A shock wave converging device for a chemical shock tube, and a chemical shock tube. The device comprises at least one shock wave converging tube (100). The shock wave converging tube (100) comprises: a first conversion tube (110), wherein an input end of the first conversion tube (110) is connected to a driven section, the first conversion tube (110) is configured to convert, when an incident shock wave is inputted at the driven section, the incident shock wave into an oblique shock wave, and the projection of an inner wall of the first conversion tube (110) on a target plane is a concave curve; an oblique straight tube (120), wherein an input end of the oblique straight tube (120) is connected to an output end of the first conversion tube (110), the oblique straight tube (120) is configured to perform shock wave enhancement processing on the oblique shock wave to obtain an enhanced shock wave, and the projection of an inner wall of the oblique straight tube (120) on the target plane is an oblique line segment; and a second conversion tube (130), wherein an input end of the second conversion tube (130) is connected to the oblique straight tube (120), the second conversion tube (130) is configured to convert the enhanced shock wave into a parallel shock wave, and the projection of an inner wall of the second conversion tube (130) on the target plane is a convex curve.
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