Shock wave enhancement method for shock tube

A technology of shock tube and shock wave, which is applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve problems such as dependence and inability to directly expand the application of shock waves

Active Publication Date: 2017-05-31
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the results rely on the calorimetric complete gas model and cannot be directly extended to higher intensity shock waves

Method used

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  • Shock wave enhancement method for shock tube
  • Shock wave enhancement method for shock tube
  • Shock wave enhancement method for shock tube

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Embodiment Construction

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0018] The embodiment of the present invention provides a shock wave enhancement method for a shock tube, which can accurately and effectively increase the incident shock wave intensity, improve the performance of the shock wave tube, and enable it to simulate more extreme strong shock waves or high temperature and high pressure environments .

[0019] figure 1 It is a flowchart of a shock wave enhancement method for a shock tube according to an e...

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Abstract

The invention discloses a shock wave enhancement method for a shock tube, and belongs to the field of fluid mechanics. The shock wave enhancement method includes the steps: performing perfect gas equivalent assumption for the enthalpy value of shocked gas to obtain a moving shock wave basic relation after high-temperature gas effect modification; acquiring the shock dynamics theory after high-temperature gas effect modification according to the moving shock wave basic relation after high-temperature gas effect modification; designing a wall surface contraction line of a contraction section of the shock tube according to the shock dynamics theory after high-temperature gas effect modification, and enhancing shock waves by the shock tube with the wall surface contraction line contraction section. The wall surface contraction line after high-temperature gas effect modification is designed, incident plane shock waves with low strength can be continuously enhanced in a contraction duct and finally enter a straight duct with a small section for propagation in a plane form, and planar shock waves with higher strength and without obvious post-wave disturbance are obtained.

Description

technical field [0001] The invention relates to the field of fluid mechanics, in particular to a shock wave enhancement method for a shock tube. Background technique [0002] At present, whether it is academic research related to shock waves or practical applications related to aerospace, high-speed flow, explosion and shock, more and more strong shock wave problems need to be faced. A shock tube is a device that generates a shock wave and uses the incident shock wave to compress the experimental gas to simulate the required working conditions, and increasing the intensity of the incident shock wave is one of the key technologies to improve the performance of the shock tube. [0003] The literature "A method for generating strong shock waves" (Hertzberg A) pointed out that the method of increasing the shock wave intensity in the shock tube is mainly to increase the pressure ratio and sound velocity ratio of the gas in the driving section and the gas in the driven section, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20
Inventor 詹东文李祝飞朱雨建翟志刚杨基明罗喜胜
Owner UNIV OF SCI & TECH OF CHINA
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