论文标题
气动系统，用于在线凝结的非理想蒸气瞬态流中的压力探针测量
Pneumatic System for Pressure Probe Measurements in Transient Flows of Non-Ideal Vapors Subject to Line Condensation
论文作者
论文摘要
本文介绍了在非理想条件下有机蒸气流中压力探针测量的气动系统的设计，结构和调试，接近液体蒸气饱和曲线，以及不适用理想气体定律的关键点。在Politecnico Milano的Trova吹风风洞中，使用在中/高温有机Rankine周期中使用的流体硅氧烷MM进行实验。通过理论计算和实验评估了与气动线（蒸气液压弯液，静液压头，质量 - 链接）相关的挑战，并通过氮冲洗程序避免了。用皮托管以0.2和0.5的马赫数中的非理想亚音速流中的皮托管进行调试测试。通过动态测试程序确定并解决了测量延迟问题。验证了完整系统的正确性能，以测量有机蒸气的非理想流中的总，静态和动态压力。
This paper presents the design, construction and commissioning of a pneumatic system for pressure probe measurements in flows of organic vapors in non-ideal conditions, close to the liquid-vapor saturation curve and the critical point where the ideal gas law is not applicable. Experiments were performed with fluid siloxane MM, employed in medium/high temperature Organic Rankine Cycles, in the TROVA blow-down wind tunnel at Politecnico Milano. Challenges linked to condensation in pneumatic lines (vapor-liquid menisci, hydrostatic head, mass-sink), were evaluated with theoretical calculation and experiments, and were avoided with a nitrogen flushing procedure. Commissioning tests were performed with a Pitot tube in non-ideal subsonic flows at Mach numbers of 0.2 and 0.5. Measurement delay issues were identified and solved through a dynamic testing procedure. The correct performance of the complete system was verified for probe measurements of total, static and dynamic pressure in non-ideal flows of organic vapors.
