军械保障指挥自动化系统效能评估指标体系研究

在对系统结构和功能进行详细分析的基础上,构建了某级军械指挥自动化系统效能评估指标体系模型,给出了各级指标的专家判断矩阵,对其一致性进行检验,得出了各评估指标的权重。     

Influence of propagation direction on operation performance of rotating detonation combustor with turbine guide vane

Due to the pressure gain combustion characteristics, the rotating detonation combustor (RDC) can enhance thermodynamic cycle efficiency. Therefore, the performance of gas-turbine engine can be further improved with this combustion technology. In the present study, the RDC operation performance with a turbine guide vane (TGV) is experimentally investigated. Hydrogen and air are used as propellants while hydrogen and air mass flow rate are about 16.1 g/s and 500 g/s and the equivalence ratio is about 1.0. A pre-detonator is used to ignite the mixture. High-frequency dynamic pressure transducers and silicon pressure sensors are employed to measure pressure oscillations and static pressure in the combustion chamber. The experimental results show that the steady propagation of rotating detonation wave (RDW) is observed in the combustion chamber and the mean propagation velocity is above 1650 m/s, reaching over 84% of theoretical Chapman-Jouguet detonation velocity. Clockwise and counterclockwise propagation directions of RDW are obtained. For clockwise propagation direction, the static pressure is about 15% higher in the combustor compared with counterclockwise propagation direction, but the RDW dominant frequency is lower. When the oblique shock wave propagates across the TGV, the pressure oscillations reduces significantly. In addition, as the detonation products flow through the TGV, the static pressure drops up to 32% and 43% for clockwise and counterclockwise propagation process respectively.     

火炮身管无损检测方法

为了延长火炮身管寿命,进一步提高射击精度。研究火炮身管缺陷检测技术,结合身管不同的损伤类型,通过比较不同的身管检测方法,讨论它们的优缺点和发展前景,并得出相控聚焦超声导波检测新技术的优越性,应用在火炮身管检测中,可占据优势地位,使其可以更好地投入到军队的实际应用中,提高作战效能。     

基于磁致伸缩式超声导波测温技术基础研究

温度是科学研究中最普遍的物理量,也是生产精密仪器的重要参数,然而国内对于高温环境除热电偶测温传感器外尚无可靠的原位测试方法。依据超声导波测温的原理,设计出一套基于磁致伸缩效应的超声导波测温装置,测试了该装置在常温以及常温(12℃)~600℃的运行情况。实验表明,该装置可以在高温环境下稳定运行,并且得到常温(12℃)~600℃范围内的起始声波和端面回波之间时间间隔△t与介质温度之间的对应关系,为2 000℃以上的高温测量奠定了基础。     

转管炮降低机心组导轨摩擦力研究

为了使转管炮机心组消耗的驱动功率最小,对机心组速度、主滚轮相对机体位置、机心体左右导轨及倾角关系等对驱动功率的影响进行研究。表明最好选用机心组凸轮加速度最小,主滚轮相对机体质心位置等于零,最好用无横向位移以及有夹角的关系最好。优化结果表明:9 000 rpm的射速,驱动功率由机心组加速度变化引起140kw下降到31 kw,降到不足于原设计曲线的22%;射速为3 300 rpm的主滚轮压力峰值参数化峰值1 086.5 N,升高到10 000 rpm的峰值9 779.3 N。无横向以及有夹角降低压力有横向以及无夹角90.9%。     

动态疏散逃生系统研究及其应用

保证人员疏散安全是建筑防火安全设计的重要目标之一,而疏散逃生设施是疏散设施不可或缺的组成部分。分别从理念、技术和应用层面介绍动态疏散逃生系统在机场环境中的应用,该系统实现了信息化控制管理,可根据火灾实时情况动态引导人员疏散,具有语音、调整疏散路径、光流等特点,实现＂安全、准确、迅速＂地引导人员避烟逃生,较以往应急疏散指示灯具具有更高的可靠性和安全性。