用多孔塞片实现推进剂微小流率的控制

在10 cm霍尔推力器工作流率需求分析的基础上,利用小孔节流原理和氙气黏性随温度变化明显的特性,采用粉末冶金多孔金属塞片作为节流元件,在给定入口压力的情况下,通过调节温度实现推进剂微小流率的控制。对基于该控制原理而设计的流量控制器开展了各项环境试验,即在试验前后利用推进剂流率测试系统对其性能进行了测试,测试结果一致性较好,符合设计要求。该流量控制器可在较宽的温度范围内实现不同流率的实时调节,从而满足推力器不同工作状态的流率需求,具有较强的适应性和调节性。

Control of the propellant micro-flow-rate using porous metal

Based on the analysis of the working requirement of the 10 cm Hall thruster, by using the orifice throttling theory and the properties of the xenon viscosity that can significantly change with the temperature, and with the powder metallurgy porous material as a throttle element, the propellant micro-flow-rate adjustment is realized. The flow controller based on this control technology is designed, and the environment tests are carried out. The flow performances of the flow controller are tested on the propellant flow testing systems before and after the environment tests, and the observed results are consistent very well with each other and satisfy the design requirements. The flow controller can achieve the real-time adjustment in a wide range of temperature, its functions can meet the flow demands of different products under different working conditions, and it also has a good adaptability and adjustable performance.