用于机载雷达的流线型差压式流量计

摘要

A streamline pressure difference flow meter for airborne radar is designed in this paper .The pres-sure differences corresponding to different flow rates under practical condition are studied by numerical simula -tion and experiment , the relation between pressure difference and flow rate is therefore obtained , and then the relation curve between discharge coefficient and Reynolds number is got .The discharge coefficient is always constant near 0.87, and the discharge coefficient is reasonably linear with the Reynolds number , especially under the condition of low Reynolds number .It is perfectly meeting with the properties of airborne radar .The flow meter in this paper is further incorporated into a compact integrated test device to measure temperature , pressure and flow rate , which has already been used in airborne radar products .It also has guidance value for similar projects .%文中设计了一种用于机载雷达环境的流线型差压式流量计，通过数值模拟和实验研究了实际应用条件下不同流量对应的压差，从而得到压差和流量之间的确定关系，并由此得出流出系数和雷诺数之间的关系曲线。流出系数始终保持在0．87左右，并在低雷诺数条件下仍保持良好的线性一致性，与机载雷达的特点十分吻合。进一步将其扩展为一种集成度高的温度、压力、流量一体化测试装置，已应用于机载雷达产品中，对其他类似工程应用也具有指导意义。