收稿日期:
2024-01-25
修回日期:
2024-02-21
接受日期:
2024-03-20
出版日期:
2024-04-07
发布日期:
2024-04-03
通讯作者:
李军伟
E-mail:david78lee@bit.edu.cn
Shidi AI1, Junwei LI1(), Zhongliang TIAN2, Lei HAN3, Ningfei WANG1
Received:
2024-01-25
Revised:
2024-02-21
Accepted:
2024-03-20
Online:
2024-04-07
Published:
2024-04-03
Contact:
Junwei LI
E-mail:david78lee@bit.edu.cn
摘要:
飞行条件下固体火箭发动机常经历复杂过载情况,其内弹道骤然抬升或振荡偶有发生。为研究动态过载条件下固体火箭发动机燃烧室内压强特性,根据Greatrix燃速增强模型和考虑燃面退移的零维内弹道模型获得了过载与推进剂燃面质量流量关系曲线;基于该关系对柱锥内孔装药进行了复合过载下的内流场仿真,研究了横向过载加速度、横向振动及振动频率对发动机动态压强特性和旋涡流动的影响。结果表明,随着横向过载加速度与横向振动的增大,燃烧室内平衡压强抬升和压强振荡幅值随之增大,在工作压强为10.54 MPa时加速度每增加1g,横向过载加速度能提高0.02%压强振幅及0.35%平衡压强;横向振动频率从7 Hz上升至320 Hz过程中,压强振荡幅值逐渐减小,但在燃烧室声腔固有频率附近会因共振作用被放大,一阶共振(160 Hz)使压强振幅从0.16%提高到0.30%,为原振幅2倍;当复合过载频率与燃烧室声腔共振时,能量从推进剂表面传递进入燃烧室的过程更为有序。
中图分类号:
艾诗迪, 李军伟, 田忠亮, 韩磊, 王宁飞. 横向复合过载下固体火箭发动机压强振荡[J]. 航空学报, 2024, 45(22): 130233.
Shidi AI, Junwei LI, Zhongliang TIAN, Lei HAN, Ningfei WANG. Solid rocket motor pressure oscillations under lateral composite overloads[J]. Acta Aeronautica et Astronautica Sinica, 2024, 45(22): 130233.
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