CAJ | 학술논문

建立了一维非稳态传热、传质、裂纹扩展方程,对复合固体推进剂在静电激励下的危险性反应过程进行了数值模拟研究.计算了使一种HTPB推进荆发生危险的临界放电能量为0.74 J,与文献报道值0.76 J接近,说明本数值计算模型比较准确.在模型验证的基础上,考察了某推进剂的特征参数,如断裂韧性、裂纹扩展速度、固相分解热、燃速及静电放电时间对该推进剂发生危险时的临界放电能量和功率的影响规律.研究表明,放电时间、断裂韧性、裂纹扩展速度、燃速对推进荆发生危险变化的临界能量影响较大,断裂韧性越大、裂纹扩展速度越低、燃速越高的推进荆越容易在静电激励下发生危险.
건립료일유비은태전열、전질、렬문확전방정,대복합고체추진제재정전격려하적위험성반응과정진행료수치모의연구.계산료사일충HTPB추진형발생위험적림계방전능량위0.74 J,여문헌보도치0.76 J접근,설명본수치계산모형비교준학.재모형험증적기출상,고찰료모추진제적특정삼수,여단렬인성、렬문확전속도、고상분해열、연속급정전방전시간대해추진제발생위험시적림계방전능량화공솔적영향규률.연구표명,방전시간、단렬인성、렬문확전속도、연속대추진형발생위험변화적림계능량영향교대,단렬인성월대、렬문확전속도월저、연속월고적추진형월용역재정전격려하발생위험.
One dimension unsteady equation of heat and mass transfer, crack propagation equations were established to simu-late the electrostatic hazard process of composite solid propellant. The calculation result shows that the critical electrostatic dischar-ging energy to ignite a HTPB propellant is 0.74 J, which fits the reported value 0.76 J well. The model was proved to be correct. Based on the model verification, the effects of propellant properties, such as fracture toughness,crack propagation velocity, heat of vaporization, burning rate and electrostatic discharging time, on the electrostatic hazards were studied. According to the simulation the effects of discharging time, crack propagation velocity, burning rate on the critical energy are greater. And the propellants with higher fracture toughness, lower crack propagation velocity, faster burning rate, tend to be dangerous in the stimulation of static e-lectricity.