Propellant powder variable capacity burning rate testing device

Abstract

The invention discloses a propellant powder variable capacity burning rate testing device, belonging to the explosive property test field. The technical characteristics include that a pressure sensor is respectively arranged on the wall of a combustion chamber and a piston, the piston and a piston cavity are in slide fit, a piston rod fixedly connected with the piston is used for leading the connecting wire of the sensor in the piston to the outside of the piston cavity, and ignition cartridge bag and propellant powder to be tested are placed in the combustion chamber; when in test, the propellant powder to be tested is burned in the combustion chamber and the piston is pushed to move, the two pressure sensors respectively record pressure curves of combustion chamber fixed position and piston bottom, namely curve p1-t and curve p2-t, and a high speed camera record piston rod moving stroke-time curve, namely L-t curve; and computing and processing are carried out by virtue of a data acquisition and processing system, thus finally obtaining the burning rate pressure coefficient and burning rate pressure index of propellant powder to be tested. The invention not only solves the problem of measuring propellant powder variable capacity burning rate but also solves the technical problem that cartridge bottom pressure measurement is simulated.

Description

technical field [0001] The invention belongs to the field of propellant performance testing, and mainly relates to a propellant combustion performance test device, in particular to a device capable of testing the burning rate of barrel weapon propellant under the condition of airtight variable capacity. Background technique [0002] The propellant is the power source for the barrel weapon to complete the projectile launch. Its combustion performance directly determines the initial velocity of the projectile, the life of the weapon barrel and the stability of the barrel weapon launch. In the development process of gunpowder for body-tube weapons, the burning rate of propellant is generally tested by the closed detonator test method to evaluate the combustion performance of propellant. Since the airtight detonator used in the test is a constant volume test device, there are generally 100ml, 200ml, 500ml and 800ml models, these different types of airtight detonators can test th...

AI Technical Summary

Problems solved by technology

Therefore, there are following problems in testing the burning speed of propellant with the explosive device test method: (1) the propellant burns under the state of constant volume, which is too different from the variable volume process in the actual application process; (2) when the propellant burns, Basically keep a static state, which is inconsistent with the actual application of the propellant burning at a certain speed

From the technical information retrieved so far, there is no public report on the burning rate test of the propellant under the condition of airtight variable volume

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