喷嘴阵射流陀螺温度场与压强有限元分析

Finite element analysis of temperature and pressure on nozzle array fluidic gyroscope performance

研究了喷嘴阵射流陀螺敏感元件内部温度场和压强分布。采用Ansys有限元分析软件,分别计算了喷嘴阵结构敏感腔体内部温度分布和压强分布。计算结果表明:在距出口1.5 mm处平行放置的两热电阻丝在通电加热作用下,提高了热电阻丝周围的气体的温度,使敏感腔体内靠近热电阻丝处气体产生温度梯度,并且温度梯度关于腔体中心轴对称;靠近出气口处的压强比腔体内其他位置压强高,压强值为0.211 09 Pa,腔体内其他位置的压强范围为(3.69×10-16P^1.52×10-15)Pa,可视为0 Pa。对喷嘴阵陀螺的结构优化,提高其性能提供了理论依据。

The temperature and pressure distribution in sensitive element of nozzle array structure gyroscope is analyzed. Using Ansys software, the finite element simulation is conducted by a series of procedures. The temperature and pressure distributions of nozzle array structure fluidic gyroscopes are calculated. The results show that the thermal wires heat temperature of the surrounding gas which place at 1.5mm from the outlet, producing internal temperature gradient in sensitive cavity which changes symmetry as of the cavity center. The pressure near the outlet is higher than any other position in the cavity, which is 0. 21109 Pa, and other are from 3.69 × 10^-16 Pa to 1.52 × 10^-15. A theoretical basis is provided for the structure optimization of nozzle array gyroscope and the improvement of its performance.