【摘要】 针对某超流氦系统所需要的低温节流阀,设计并加工了几种不同结构形式和尺寸的阀针。运用数值模拟方法分析了节流阀的流量特性,并运用实验的手段测量了其流量系数与阀门开度之间的关系。最终确定了一个适合该超流氦系统的较为理想的节流阀。更多还原

【Abstract】 Several different valve needles were designed and manufactured for a superfluid helium system.The numerical simulation was used to analyze the flow characteristics of cryogenic throttle valves.A test bench was also built up to investigate the performance of the different valve needles.Finally,an appropriate throttle valve was chose to serve the superfluid helium system.更多还原