CO2用于气动弹射的可行性分析

针对传统气动弹射介质空气做功能力不足的问题,提出采用CO_2作为新型气动弹射介质。基于质量守恒和能量守恒定律建立了以CO_2为弹射介质的弹射热力模型,并使用该模型对比分析了CO_2和空气作为弹射介质对于弹射性能的影响。得到了弹射过程中高低压室内介质状态以及飞行器运动参数的动态变化过程。与空气相比,CO_2具有更大的做功能力。相同的热力状态下弹射相同质量的飞行器,使用CO_2可获得更大的出筒速度。CO_2作为弹射工质对于大质量的飞行器优势明显,在不减小出筒速度的情况下,使用CO_2可使负载质量提升50%以上,验证了CO_2作为弹射工质的可行性。

Feasibility Analysis of CO2 Used in Pneumatic Catapult

Aiming at the problem of insufficient functional power of traditional pneumatic catapult medium air, it is proposed to use carbon dioxide as a new catapult medium. Based on the law of mass conservation and energy conservation, the pneumatic catapult thermodynamic model with carbon dioxide as the catapult medium is established, and the effects of carbon dioxide and air as the catapult medium on the catapult performance are analyzed using the model. The dynamic change process of the medium state in the high and low pressure chambers and the movement parameters of the aircraft during the catapult process are obtained. Compared with air, carbon dioxide has greater power. Using carbon dioxide to eject aircraft of the same mass under the same thermal state can achieve a greater exit speed. The aircraft with a larger mass can fully utilize the power of carbon dioxide, and the load mass can be increased by more than 50% with the use of carbon dioxide without decreasing the exit speed. The feasibility of carbon dioxide as a working medium for pneumatic catapult is verified.