水面无人艇是海上有人/无人协同作战体系中重要的一环,对装备的保障性、可维修性要求较高,因此亟需建立与其装备体系相匹配的装备保障体系。为解决水面无人艇的保障体系设计问题,应用基于模型的系统工程(Model Based System Engineering...水面无人艇是海上有人/无人协同作战体系中重要的一环,对装备的保障性、可维修性要求较高,因此亟需建立与其装备体系相匹配的装备保障体系。为解决水面无人艇的保障体系设计问题,应用基于模型的系统工程(Model Based System Engineering,MBSE)方法,面向典型应用场景构建水面无人艇装备保障体系的多视图模型,并给出水面无人艇装备保障体系在仿真推演过程中的关键要素和基本流程,初步构建可靠性-能力-效能综合评估指标体系,实现了“作战任务-保障任务-保障能力需求-保障体系结构”的闭环验证,为水面无人艇装备体系和装备保障体系的协同设计和高效运用提供参考。展开更多
We investigate experimentally and analytically the combustion behavior of a high-metal magnesium-based hydro- reactive fuel under high temperature gaseous atmosphere. The fuel studied in this paper contains 73% magnes...We investigate experimentally and analytically the combustion behavior of a high-metal magnesium-based hydro- reactive fuel under high temperature gaseous atmosphere. The fuel studied in this paper contains 73% magnesium powders. An experimental system is designed and experiments are carried out in both argon and water vapor atmo- spheres. It is found that the burning surface temperature of the fuel is higher in water vapor than that in argon and both of them are higher than the melting point of magnesium, which indicates the molten state of magnesium particles in the burning surface of the fuel. Based on physical considerations and experimental results, a mathematical one-dimensional model is formulated to describe the combustion behavior of the high-metal magnesium-based hydro-reactive fuel. The model enables the evaluation of the burning surface temperature, the burning rate and the flame standoff distance each as a function of chamber pressure and water vapor concentration. The results predicted by the model show that the burning rate and the surface temperature increase when the chamber pressure and the water vapor concentration increase, which are in agreement with the observed experimental trends.展开更多
文摘水面无人艇是海上有人/无人协同作战体系中重要的一环,对装备的保障性、可维修性要求较高,因此亟需建立与其装备体系相匹配的装备保障体系。为解决水面无人艇的保障体系设计问题,应用基于模型的系统工程(Model Based System Engineering,MBSE)方法,面向典型应用场景构建水面无人艇装备保障体系的多视图模型,并给出水面无人艇装备保障体系在仿真推演过程中的关键要素和基本流程,初步构建可靠性-能力-效能综合评估指标体系,实现了“作战任务-保障任务-保障能力需求-保障体系结构”的闭环验证,为水面无人艇装备体系和装备保障体系的协同设计和高效运用提供参考。
基金Project supported by the Young Scientist Fund of the National Natural Science Foundation of China(Grant No.51006118)
文摘We investigate experimentally and analytically the combustion behavior of a high-metal magnesium-based hydro- reactive fuel under high temperature gaseous atmosphere. The fuel studied in this paper contains 73% magnesium powders. An experimental system is designed and experiments are carried out in both argon and water vapor atmo- spheres. It is found that the burning surface temperature of the fuel is higher in water vapor than that in argon and both of them are higher than the melting point of magnesium, which indicates the molten state of magnesium particles in the burning surface of the fuel. Based on physical considerations and experimental results, a mathematical one-dimensional model is formulated to describe the combustion behavior of the high-metal magnesium-based hydro-reactive fuel. The model enables the evaluation of the burning surface temperature, the burning rate and the flame standoff distance each as a function of chamber pressure and water vapor concentration. The results predicted by the model show that the burning rate and the surface temperature increase when the chamber pressure and the water vapor concentration increase, which are in agreement with the observed experimental trends.
