The invention provides a comprehensive experiment platform for testing pyrolysis and combustion characteristics and fire spreading characteristics of powder. The comprehensive experiment platform comprises: a support frame, a sealing device, a measuring device, a heating device, a camera device, a tail gas treatment device, a temperature monitoring device and an igniter, the heating device and thetemperature monitoring device can process the powder and monitor the environment temperature in real time; the measuring device can precisely detect the mass loss of the powder in the combustion andpyrolysis process, the camera device can detect the powder combustion change condition and the flame form of the powder in the combustion process, and the tail gas treatment device can treat waste gasgenerated by combustion. The platform is convenient to operate, and can provide a combustion and pyrolysis experiment environment with an air circulation condition for the powder.

Comprehensive experiment platform for testing pyrolysis and combustion characteristics and fire spreading characteristics of powder

The invention belongs to the technical field of magnesium alloy application, and relates to a test system and a method for testing magnesium alloy combustion risk. The test system comprises a flame combustion test unit, an airflow adjusting device and an image and data acquisition unit. According to the flame combustion test unit, combustible gas is taken as fuel, and a heat flow densimeter mounted at a nozzle port of a combustor can detect the heat flow density of flame and provide airflow scouring and flame heating environmental conditions; the image and data acquisition unit is adopted to realize image acquisition of the whole combustion behavior process; airflow for simulating the environment is provided through the airflow adjusting device; the data acquisition unit composed of a thermocouple, a temperature data recorder and a weighing sensor can complete real-time measurement of the temperature and the mass of a sample. The method can simulate the whole process of magnesium alloycombustion generation, expansion and extinguishment under the real working condition, achieves the quick evaluation of the combustion risk of the magnesium alloy and the coated sample piece, and facilitates the revealing of the combustion behavior of the magnesium alloy and the making of fireproof measures.

Test system and method for testing combustion risk of magnesium alloy

The invention belongs to the technical field of aviation engines, and relates to a titanium alloy combustion test device and a test method thereof. The test device includes a combustion chamber, a fiber laser, a gas supply pipe, an exhaust pipe, a gas cylinder set, a mass flow controller, a check valve, a gas heater, an intake valve, a pressure control valve, an exhaust valve, a camera, and an infrared temperature sensor, a pressure sensor, a thermocouples, a sample heating device, a sample holder, a computer and the like. The gas cylinder set is used as a gas source, the gas heater heats thegas, the mass flow controller and the pressure control valve control the pressure in the combustion chamber, the sample heating device heats a sample, the fiber laser ignites the sample, a titanium alloy material/component combustion test with simulation conditions of a gas temperature to be 500 to 600 DEG C, the pressure to be 1.0 to 1.5 MPa and the sample temperature to be 600 to 900 DEG C can be realized, a computer program is adopted to control the test parameters such as the ignition time, and the test precision is higher. The test device has a compact structure, the mounting is convenient, the test cost is low, the urgent needs for aircraft engine titanium alloy combustion characteristic evaluation at preset and in the future can be met, and the application prospect is wide.

Titanium alloy combustion test device and test method thereof

The invention belongs to the technical field of titanium alloy applications, and relates to a laser ignition test device for a titanium fire prevention coating and a test method thereof. The laser ignition test device is composed of a combustion chamber, a laser device, a gas supply assembly, an exhaust assembly, a gas pumping assembly, a pressure sensor, a temperature sensor, a video camera and the like. The test method comprises the steps that a combustion chamber is vacuumized firstly, then gases output from an oxygen cylinder and an air cylinder are mixed and then introduced into the combustion chamber, oxygen concentration of the premixed gas is precisely controlled by means of a mass-flow controller, and a laser beam is irradiated onto the surface of a titanium fire prevention coating sample via a laser incident window of the combustion chamber to realize the ignition combustion of the sample, wherein the laser emergent time is continuously adjustable. The laser ignition test device adopts a laser local temperature heating method to perform an ignition test on the titanium fire prevention coating, thereby minimizing the damage of a heat source on the titanium alloy surface coating, and greatly improving the reliability of the test method; and the test device has the advantages of compact structure, small occupied area, easy operation and high safety, and has broad application prospects.

Mi Guangbao

Papers

Titanium alloy combustion test device and test method thereof

Laser ignition test device for titanium fire prevention coating and test method thereof