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Device for testing powder combustion characteristics in vacuum condition

A technology of combustion characteristics and testing equipment, which is applied in the direction of fuel oil testing, chemical analysis by means of combustion, material inspection products, etc., to achieve the effect of saving scientific research funds and reliable testing

Inactive Publication Date: 2009-03-11
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a propellant combustion characteristic test under vacuum conditions in view of the deficiency that the existing propellant combustion measuring device can only measure a single characteristic quantity (combustion speed or combustion temperature) of the propellant combustion characteristic under atmospheric pressure. Device that can simultaneously test the burning speed, surface temperature and combustion heat of gunpowder under vacuum and low pressure conditions

Method used

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  • Device for testing powder combustion characteristics in vacuum condition
  • Device for testing powder combustion characteristics in vacuum condition
  • Device for testing powder combustion characteristics in vacuum condition

Examples

Experimental program
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Effect test

example 1

[0037] Example 1: Using a thermocouple with a diameter of 7 μm to measure a ternary mixture (45% C 3 h 8 N 4 o 4 , 45%C 4 h 10 N 4 o 4 , 15% C 3 h 12 N 4 o 4 )+3%NC (nitrocellulose) sample flame temperature as shown in Table 2, the sample diameter is 10mm, no dark area can be seen on the image taken by the high-speed camera 6, indicating complete combustion.

[0038] Table 2 Combustion temperature of a certain gunpowder sample measured by thermocouple

[0039]

example 2

[0040] Example 2: The burning speeds of three propellant samples were obtained under different vacuum pressures, see Table 3.

[0041] Table 3 Burning rates of different powder samples measured under different vacuum pressures

[0042]

example 3

[0043] Example 3: Under the pressure of 200Pa, the gunpowder sample composed of 57% nitrocellulose, 28% nitroglycerin, 11% dinitrotoluene and 4% other components was tested, and the highest temperature on the burning surface of the sample was measured to be 300°C. Based on this, the heat of combustion is calculated to be 292.6kJ / g.

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Abstract

The invention discloses a testing device of gunpowder combustion characteristics in vacuum, which mainly comprises a combustion chamber, a vacuum pump, an electric heater, a thermoelectric couple, a high speed camera and a data acquisition and processing system; wherein, the vacuum pump provides vacuum environment for the combustion chamber; by controlling the heating current and the heating time of the electric heater, different ignition isoperibols can be provided for tested gunpowder samples in the combustion chamber; and the data acquisition and processing system collects the test data generated by the thermoelectric couple and the gunpowder combustion images shot by the high speed camera when the tested gunpowder samples combust, and finally obtains the combustion characteristics of the tested gunpowder samples through corresponding processing and calculation. The invention not only can be used for testing the parameters such as combustion speed, combustion surface temperature and combustion heat and the like of the gunpowder in vacuum, but also can be used for the generation and collection of the combustion products of the gunpowder under different vacuum conditions. The invention has the overriding advantages of high integration level, obtaining various parameters by one testing and low testing expenses.

Description

technical field [0001] The invention belongs to the technical field of propellants and explosives, and mainly relates to a propellant combustion characteristic testing device, in particular to a propellant combustion characteristic testing device under vacuum conditions. Background technique [0002] The combustion characteristic of gunpowder is one of the basic properties of gunpowder, which is characterized by the burning speed and burning temperature of gunpowder. There are target line method, ultrasonic method, etc. to measure the burning speed of gunpowder. The target line method is a commonly used test method, and the measuring device using this method is mainly used to measure the burning speed of gunpowder under a pressure not greater than 30MPa. The device mainly includes a combustion chamber, a nitrogen pressurization system and an on-off signal recording system. The combustion chamber is a cylindrical pressure-resistant container made of special steel, which con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/22G01N31/12
Inventor 郑林赵宏立靳建伟刘来东李先张邹邹杨丽侠
Owner XIAN MODERN CHEM RES INST
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