In order to study the influence of acceleration on the internal ballistic performance of solid rocket motors, the combustion experiment must be performed in a set acceleration field environment. During the experiment, the frequency converter is first operated to make the transmission shaft of the test stand reach the set rotation speed and provide the required acceleration field. In order to scientifically analyze and compare the experimental results, it is required to use the same tablet-type charge engine and keep the loading parameters constant, that is, the size and shape of the charge, the nozzle material and throat diameter, the structure of the igniter, and the amount of charge. No change. The engine is mounted on the interface part and its position must fully satisfy the condition that the acceleration vector is perpendicular to the charge burning surface.
The influence of acceleration on the interior ballistic performance of solid rocket motors: The performance of solid rocket motors changed significantly under acceleration conditions. The average combustion chamber pressure p increased by 36% and the burning time t decreased by 20%. Other parameters also changed somewhat. There are many reasons for this change, but the dominant one is the acceleration sensitivity of aluminum-containing composite propellants, and the core problem is the acceleration sensitivity of propellant burning rate. The change of burning rate is the decisive factor in the change of the ballistic performance of solid rocket motors. There are many factors that affect the burning rate change, such as aluminum powder content, particle size and shape; oxidant content, particle size and grading ratio; static burning rate value; acceleration and the azimuth of its vector-directed burning surface;combustion chamber pressure; combustion Indoor flow field and nozzle flow field. To analyze this problem scientifically, three tools are needed: the pocket model, the particle dynamics model and the combustion model model are related to each other. The pocket model is the premise, which explains the influence of AP on the agglomeration and combustion process of aluminum particles. . The particle dynamics model is the basis of the analysis. It is a study of the conditions required to agglomerate the force of the aluminum particles and the conditions for the particles to fly away or remain in the fuel surface under the acceleration field. The combustion model is to discuss the thermodynamic process after particles stay on the burning surface.
Impeller feeder is one elements of Hammer Mill,grain enter into and out of the hamer mill through the impell feeder ,so it can be used as one part in animal feed mills,poultry feed mills,pig feed plant,chicken feed plant,oil plants.
Working principle
The raw material enters the machinery through the inlet and is conveyed upward by the impeller feeder. It then gets into the self-cleaning magnets and finally enters the hammer mill. The impeller feeder consists of impeller, gear motor, self-cleaning magnets, air adjustment door, etc.
Poultry Feeding Equipment,Impeller Feeder,Cow Feed Impeller Feeder,Pellet Impeller Feeder
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