碟形锥柱型药柱的燃烧规律  

Combustion laws of dished head conic-column grain

作　　者：杨艳羽 徐铭泽 费月 孙晓霞 黄金红 张以亭 高艳军 万峻成 YANG Yanyu;XU Mingze;FEI Yue;SUN Xiaoxia;HUANG Jinhong;ZHANG Yiting;GAO Yanjun;WAN Juncheng(Liaoning North Huafeng Special Chemical Limited Company,Fushun Liaoning 113003,China)

机构地区：[1]辽宁北方华丰特种化工有限公司,辽宁抚顺113003

出　　处：《航空动力学报》2024年第1期248-257,共10页Journal of Aerospace Power

摘　　要：装药设计方法影响发动机内弹道性能,为提高装药利用率,分别采用UG NX和MATLAB软件进行了建模和编程计算,得到了药柱燃烧过程中燃烧面积推移规律和残药率与设计参数的函数关系图,进行了算例分析。计算结果表明:以药柱外径D为基准,当环向槽圆弧半径r∈(0,0.05D),圆柱段内孔半径R_(2)∈(0.1D,0.4D),环向槽圆弧圆心旋转半径R_(3)∈(R_(2),0.42D),圆柱段长L_(2)∈(0.4D,1.53D)时,药柱燃烧呈现先增面性后减面性。残药率与r和R_(2)的变化趋势同为单调递减,残药率与L_(2)∈的变化趋势为单调递增,残药率与R_(3)的变化趋势为先增大后减小。从减轻质量,提高强度和提高产品加工制造的工艺性等方面综合考虑,建议优先选择碟形封头。计算结果与实际数据的最大相对误差为0.078%。Charge design methods affect the ballistic performance of the engine.In order to improve the charge utilization rate,UG NX and MATLAB software were used for modeling and programming of the calculation,and the function relationship diagram of the combustion surface,the residual drug rate and the design parameters during the combustion process of the drug column was obtained,and finally the example analysis was carried out.The results showed that when D was defined as the outer diameter of grain,and the relative radius of circular groove r was(0,0.05D),the relative radius of the hole in the cylindrical section R_(2) was(0.1D,0.4D),the relative radius of the circular center of the circular groove R_(3) was(R_(2),0.42D)and the length of the cylinder L_(2)was(0.4D,1.53D),the combustion law was progressive at first and then regressive.The waste grain rate and the change trend of r and R_(2) monotonically decreased,the waste grain rate and the change trend of L_(2) monotonically increased,and the waste grain rate and the change trend of R,first increased and then decreased.From the aspects of weight reduction,improvement of the strength,processing and manufacturing,it is recommended to give priority to the dished head.The maximum relative error between the calculated result and the actual data was 0.078%.

关 键 词：碟形锥柱型药柱 残药率 燃烧规律 固体火箭发动机 壁厚 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]