CAFL(Control Air Flow lab) is designed to study the flow of gas inside the duct, the law of the whole process of gas jet entering space through the duct and discharging into the atmosphere, and the calculation method of dynamic parameters, so as to provide important data for the design of the duct system.

CFD software is short for Computational fluid Dynamics software, which is specially used for the analysis, calculation and prediction of flow field. Through CFD software, the phenomena occurring in the flow field can be analyzed and displayed, the performance can be predicted in a relatively short time, and the design effect can be achieved by changing various parameters.
CFD is developed along with the development of computer technology and numerical computing technology. Simply put, CFD is equivalent to "virtual" experiments on the computer to simulate the actual flow of fluid. The basic principle is to solve the differential equation of controlling fluid flow numerically, and get the discrete distribution of the flow field in the continuous region, so as to approximate the fluid flow situation.

Flame retardant technology - flame retardant treatment of fibers
Flame retardant mechanism: The flame retardant treatment of fiber is to add a flame retardant to some of the raw silk (such as polyester, cotton fiber, acrylic fiber) that is itself flammable, so that it can inhibit the free group in the combustion process; Or change the thermal decomposition process of fiber, accelerate dehydration carbonization; Some are to make the flame retardant decompose and release non-flammable gas covering the fiber surface, which plays the role of isolating air.
Flame retardant treatment method:
Improve the thermal stability of fiber forming polymers

By introducing aromatic ring or aromatic heterocyclic ring into the macromolecular chain of the fiber forming polymer, the rigidity of the molecular chain, the density of the macromolecular chain and the cohesion of the macromolecular chain are increased

Flame retardant modification of raw silk
Copolymerization method: In the synthesis process of fiber forming polymers, the compounds containing phosphorus, halide, sulfur and other flame retardant elements are introduced into the macromolecular chain as a copolymer monomer (reactive flame retardant), and then the material with strong flame retardancy is added to the fiber.