亚音速流场中三点和五点总温探针测量的研究

Research on three-point and five-point total temperature probe measurement in subsonic flow field

中文关键词: 总温探针  恢复系数  支杆直径  回流区  尾迹

英文关键词: total temperature probe  recovery factor  rod diameter  recirculation zone  wake

中文摘要:

      采用数值模拟的方法，研究了两种不同结构形式(测点横向与径向布置)总温探针的总温恢复系数的差异、插入探针支杆直径不同时两种总温探针对被测流场的影响差异。数值模拟结果表明：对于三点和五点总温探针，测量时三点梳状总温探针的恢复系数较五点耙状探针更高。保持马赫数不变时，气流温度的升高使总温探针的恢复系数减小。探针支杆直径越大，回流区越长，对下游截面造成的损失越大，若探针支杆上有多根感压管，会减小对流场下游的影响。

英文摘要:

      Numerical simulation method is used to study the difference of the total temperature recovery coefficient of two different structures (transverse and radial arrangement of measuring points) and the influence of the two kinds of total temperature probes on the measured flow field when the diameter of the inserted probe rod is different. The numerical simulation results show that for the three-point and five-point total temperature probes, the recovery coefficient of the five-point rake-like total temperature probe during measurement is higher than that of the three-point comb probe. When the Mach number is kept constant, the recovery coefficient of the total temperature probe decreases with the increase of air temperature. The larger the probe rod diameter and the longer the recirculation zone, the greater the loss to the downstream section. If there are multiple pressure-sensitive tubes on the probe rod, the impact on the downstream of the flow field will be reduced.