Gunpowder combustion property test device under pressure reduction condition

A technology of pressure drop and combustion characteristics, applied in the direction of fuel oil testing, material inspection products, etc., can solve the problems of less pressure points and narrow initial pressure range of gunpowder flameout environment, and achieve the effect of saving scientific research funds

Inactive Publication Date: 2012-12-26
XIAN MODERN CHEM RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a propellant combustion characteristic testing device under pressure drop conditions in view of the problems of narrow initial pressure range and few pressure points in the final propellant extinguishing environment in existing experimental devices similar to propellant pressure drop combustion

Method used

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  • Gunpowder combustion property test device under pressure reduction condition
  • Gunpowder combustion property test device under pressure reduction condition
  • Gunpowder combustion property test device under pressure reduction condition

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0035] Example 1: At different maximum pressure P H and different maximum rate of descent , the pressure drops to P K =0.1MPa, that is, under 1 atmospheric pressure, the combustion state of the propellant sample (56% of nitrocellulose, 28% of nitroglycerin, 11% of dinitrotoluene, and other 5%) of a test diameter of 7.5mm and a length of 15mm is shown in Table 1 .

[0036] Table 1

[0037]

example 2

[0038] Example 2: At different maximum pressure P H (30MPa and 100MPa), different maximum rate of descent , the pressure drops to P K >0.1MPa means greater than 1 atmospheric pressure, h=P K / P H =(0.08~0.5), the combustion state of the propellant sample (56% of nitrocellulose, 28% of nitroglycerin, 11% of dinitrotoluene, other 5%) of 7.5mm in test diameter and 15mm in length is shown in Table 2.

[0039] Table 2

[0040]

example 3

[0041] Example 3: A kind of diameter is 8mm, length is 15mm the burning velocity and flame-out time of double-base drug sample under different pressure drop rates are shown in table 3.

[0042] table 3

[0043]

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Abstract

The invention discloses a gunpowder combustion property test device under pressure reduction condition, wherein, a watch window, a pressure discharge component, a pressure sensor and an igniting component are arranged on a combustion chamber of the device; the pressure discharge component is communicated with a pressure gas buffer tank which is filled with certain-pressure nitrogen and a high-speed camera can shoot combustion process of gunpowder sample through optical lens and the watch window; when the gas pressure in the combustion chamber reaches the pressure-proof critical value of the pressure discharge component by the combustion of gunpowder sample, the pressure discharge component discharges the gas in the combustion chamber into the pressure gas buffer tank; a data collection system collects and records the data output by the pressure sensor and the high-speed camera; and an operator can obtain related property parameters of the gunpowder sample based on analysis and calculation of recorded data. The invention can measure the combustion speed, flameout state and parameters of gunpowder under different pressures and pressure reduction rates and has the outstanding advantages of high measurement pressure, large regulating range of pressure reduction rate, low test cost and wide application scope.

Description

technical field [0001] The invention belongs to the technical field of propellants and explosives, and relates to a device for testing the unsteady state combustion characteristics of propellant, in particular to a device for testing the propellant combustion characteristics under the condition of pressure drop. Background technique [0002] In the field of practical application of gunpowder, the combustion of gunpowder is mostly carried out in an unsteady state, such as the ignition process, combustion (oscillating combustion) under pressure changes, and the combustion and flameout of gunpowder in the airflow are all unsteady combustion processes. . Unsteady combustion may be triggered by any external conditions, that is, any external conditions that destroy the relationship of steady combustion can cause unsteady combustion. In the various p-t curves obtained from the propellant combustion test, it can be clearly found that the unsteady combustion phenomenon is caused by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/22
Inventor 赵宏立刘来东靳建伟赵风起李先赵瑛张邹邹杨丽侠徐司雨赵宝明
Owner XIAN MODERN CHEM RES INST
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