Experimental investigation on the starting and flow regulation characteristics of powder supply system for powder engines
Experimental investigation on the starting and flow regulation characteristics of powder supply system for powder engines
复制标题
粉末发动机供粉系统启动及流量调节特性试验研究
DOI：
10.1016/j.actaastro.2020.12.004
复制
发表时间：
2020-12
影响因子：
3.5
通讯作者：
Zhu Xiaofei
中科院分区：
文献类型：
--
作者：
Yang Jiangang;Hu Chunbo;Qiang Wei;Hu Jiaming;Hu Xu;Zhu Xiaofei
火药供给系统是具有多次点火能力和推力调节功能的火药发动机的关键部件。与纯气相相似，粉末发动机内气固两相流也存在着壅塞现象。进行了阻流和非阻流状态下的粉料气力输送实验，比较了两种状态下的输送特性。在扼流模式（模式A和模式B）下，当流化室的初始压力高于稳定阶段的压力时，供粉系统容易出现流量峰值。在流化气体量由节流通道面积决定的扼流模式A下，供粉系统容易发生波动，波动的频率和幅度与节流通道面积有关。当节流通道面积较大时，扼流模式A具有良好的重复性和流量调节性能。利用压力模拟器和小波分析实现了供粉系统从阻塞流到非阻塞流的过渡，得到了供粉系统的有效频率（<20 Hz）。实验结果和理论分析表明，在非阻塞模式下，粉末流动存在一个上限。
Powder supply system is the key component of powder engines with multiple ignition capability, and thrust modulation function. Similar to the pure gas phase, the gas-solid two-phase flow in powder engines also has a choking phenomenon. The powder pneumatic conveying experiments at choked mode and non-choked mode were carried out to compare their conveying characteristics. In the choked mode (mode A and mode B), when the initial pressure of the fluidization chamber is higher than the pressure in the stable stage, the powder supply system is prone to flow peaks. In the choked mode A where the amount of fluidization gas is determined by the area of the throttle channel, the powder supply system is prone to fluctuations, and the frequency and amplitude of the fluctuation are related to the throttle channel area. The choked mode A has good repeatability and flow regulation performance when the throttle channel area is large. Employing pressure simulator and wavelet analysis, the transition from choked flow to non-choked flow was achieved and the effective frequency (<20 Hz) of the powder supply system is obtained. Experimental results and theoretical analysis show that powder flow has an upper limit in the non-choked mode.
登录
查看更多内容
影响因子：
3.5
作者：
Betelin, V. B.;Smirnov, N. N.;Nerchenko, V. A.
通讯作者：
Nerchenko, V. A.
影响因子：
3.5
作者：
K. Williams;M. Jones;A. Cenna
通讯作者：
K. Williams;M. Jones;A. Cenna
DOI：
10.2514/6.1999-2409
发表时间：
1999-06
期刊：
--
影响因子：
--
作者：
J. Wickman
通讯作者：
J. Wickman
影响因子：
5.2
作者：
C. Liang;J. Grace;Liu Shen;Gaoyang Yuan;Xiaoping Chen;Changsui Zhao
通讯作者：
C. Liang;J. Grace;Liu Shen;Gaoyang Yuan;Xiaoping Chen;Changsui Zhao
影响因子：
2.2
作者：
Qiang Li;Z. Zou;S. Tan
通讯作者：
Qiang Li;Z. Zou;S. Tan