Propellant combustion smoke concentration testing device

Abstract

The invention discloses a propellant combustion smoke concentration testing device. The device is mainly composed of a closed combustion chamber, a pressure adjusting module, a test chamber, light sources, light intensity detection sensors, an ignition power source, a high-pressure gas source and a data acquisition and processing module. The pressure adjusting module adjusts the pressure in the closed combustion chamber and controls connection and disconnection of the closed combustion chamber and the test chamber. Symmetrical detection windows are arranged on the test cavity, and the light sources and the light intensity detection sensors are arranged on the two sides of the detection windows of the test cavity respectively; light intensity change when smoke passes through the test cavity is detected. Compared with a traditional smoke concentration testing device, the combustion chamber is separated from the test cavity, so that on the one hand, the structure of the closed combustionchamber is simple, and the difficulty of design and processing of the device is reduced; on the other hand, the requirement on the pressure resistance strength of the test cavity is low by dynamically testing smoke, and meanwhile, the test cavity is easy to clean and maintain. The device can be used for testing the combustion smoke concentration of propellants in a small dosage.

Description

technical field [0001] The invention relates to a propellant combustion smoke concentration testing device, in particular to a combustion smoke concentration testing device for propellant small-dose test samples. Background technique [0002] The solid propellant and its cladding materials produce a lot of smoke when the rocket engine is working, which will directly affect the guidance and stealth performance of the missile. Solid propellant smoke concentration is an important indicator that must be strictly controlled during the development and production of low characteristic signal propellants. Establishing a measurement and evaluation method for propellant smoke concentration is an important content in propellant formulation research and weapon model index requirements . [0003] In the field of propellant engine plume smoke testing, there is 801.1 "Solid Propellant Exhaust Plume Infrared Transmittance Test Smoke Channel Method" in the national military standard GJB 770...

AI Technical Summary

Problems solved by technology

On the one hand, this structure makes the processing of the closed combustion chamber more difficult, especially when the compressive strength of the closed combustion chamber is increased, it imposes strict requirements on the opening design of the combustion chamber and the mechanical properties of optical glass. Optical glass is weak link in its security

When the airtight combustion chamber is working, the interior needs to be filled with high-pressure nitrogen. Once the optical glass is broken, it will cause huge losses to the property and life safety of the device itself and the test laboratory.

On the other hand, it is more difficult to clean and maintain the optical glass in the closed combustion chamber

After the test device is used several times, the inner side of the optical glass on the closed combustion chamber will be polluted by the residue of propellant combustion smoke, which will cause the overall response performance of the device to deteriorate, and the inner side of the optical glass must be cleaned

Dismantling the optical glass for cleaning is not only time-consuming and laborious, but also easily affects the overall airtightness of the closed combustion chamber

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