High Accuracy, High Temperature Pressure Probes for Aerodynamic Testing
High Accuracy, High Temperature Pressure Probes for Aerodynamic Testing
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用于空气动力学测试的高精度、高温压力探头
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Arnold Afb
中科院分区：
文献类型：
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作者：
A. Ned;S. Goodman;S. Carter;Arnold Afb
本文介绍了一种坚固耐用的高精度、超小型压力传感器，适用于尺寸、精度和环境条件至关重要的众多应用。通过使用高灵敏度压阻式压力传感器以及用于传感器输出放大和校正的高分辨率数字电子器件，实现了高传感器精度。本文介绍了该传感器的各种封装方法，使其适用于风洞和真实的应用（如燃气涡轮机发动机测试）中的流量测量。这些方法包括微型差分传感器，微型5孔探头和压力耙。从这些不同的配置的数据显示出良好的响应温度和流量制度。I.介绍他的技术开发和本文中讨论的最初开发的风洞应用，其中典型的飞行性能研究，使用超高速风洞试验件涉及在高温下的非常低的压力测量。这些初始装置仅用于静态和准静态测量。在这些初始测量成功之后，决定将传感和放大器技术的使用扩展到要求更高的流量测量领域。在许多领域，精确的流量测量都是至关重要的：风洞、地面发动机试验和飞行试验都可以从高精度微型流量测量技术中受益。这些应用中的许多都需要高温和高精度，以便对设计工程师有用。在本文中，我们提出了一个微型压力传感器专门开发，以解决这些仪器的挑战。测试结果和潜在的好处，在测量精度和成本节约方面，进行了讨论。
This paper presents a ruggedized high accuracy, extremely miniature pressure transducer suitable for numerous applications where size, accuracy and environmental conditions are of critical importance. High transducer accuracy was achieved by using a highly sensitive piezoresistive pressure sensor in conjunction with high resolution digital electronics for sensor output amplification and correction. The paper presents various ways that this transducer can be packaged to make it suitable for flow measurements in both wind tunnels and real world application such as gas turbine engines testing. These methods include miniature differential transducers, miniature 5-hole probes, and pressure rakes. Data from these various configurations are presented showing excellent response over temperature and flow regimes. I. Introduction he technology developed and discussed in this paper was originally developed for Wind Tunnel Applications, where typical flight performance studies using hypervelocity wind tunnel test articles involve the measurement of very low pressures at elevated temperatures. These initial installations were used for static and quasi-static measurements only. After the success 8 of these initial measurements it was decided to extend the use of the sensing and amplifier technologies into the more demanding regime of flow measurements. There are many areas where accurate flow measurement is critical: wind tunnel, ground based engine testing, and flight test can all benefit from high accuracy miniature flow measurement techniques. Many of these applications require both high temperature and high accuracy in order to be useful to the design engineer. We present in this paper a miniature pressure transducer developed specifically to address these instrumentation challenges. Test results are presented and potential benefits, in terms of measurement accuracy and cost savings, are discussed.