【作者】 纪雪薇； 谭述君；

【Author】 Ji Xuewei;Tan Shujun;School of Aeronautics and Astronautics, Dalian University of Technology;

【机构】 大连理工大学航空航天学院；

【摘要】 为了有效抑制液体火箭的Pogo振动,目前国内外通常采用的方法是在输送管路上安装蓄压器。随着中国运载火箭规模进一步加大所需要的蓄压器容积也更大,与贮气式蓄压器相比注气式蓄压器可以更好地适应低温环境,容积大,且工作寿命长,工艺性和维护性好,所以需要对注气式蓄压器方案以及关键技术进行研究。对国内尚未应用的新型注气式蓄压器开展了研究。在建立了注气式蓄压器动力学模型的基础上,采用矩阵法计算了注气式蓄压器对推进系统稳定性的影响,并且对两种蓄压器进行了性能对比。结果表明注气式蓄压器具有更好地改变固有频率的作用,可以降低推进系统一阶频率,提高二阶频率;注气式蓄压器比贮气式蓄压器能够更有效地改变推进系统频率以避免Pogo振动的产生。为注气式蓄压器的设计、研制、使用提供了参考。更多还原

【Abstract】 In order to effectively suppress the pogo vibration of liquid rocket, the common method at home and abroad is to install the accumulator on the transmission pipeline. With the further expansion of the scale of China’s launch vehicle, the required accumulator volume is also larger. Compared with the gas storage accumulator, the gas injection accumulator can better adapt to the low temperature environment,with large volume, long working life, good processability and maintainability. Therefore, it is necessary to study the scheme and key technology of the gas injection accumulator. A new type of gas injected accumulator which has not been used in China is studied. Based on the dynamic model of gas injected accumulator, the influence of gas injected accumulator on the stability of propulsion system is calculated by matrix method, and the performance of two kinds of accumulator is compared. The results show that the gas injected accumulator can change the natural frequency, reduce the first-order frequency and increase the second-order frequency of the propulsion system; The air injection accumulator can change the frequency of propulsion system more effectively than the air storage accumulator to avoid pogo vibration.And the optimization design of the volume and inertia parameters of the gas injection accumulator is carried out, which provides a reference for the design, development and use of the gas injection accumulator.更多还原