送风温度波动对恒温波荡器隧道温控精度的影响
Influence of supply air temperature fluctuation on temperature control accuracy of constant-temperature undulator tunnels
摘要：
在波荡器隧道中由于科学装置的特殊性，对隧道内空气温度稳定性的要求非常高。以某恒温波荡器隧道为研究对象，应用PHOENICS软件建立了物理模型，采用数值模拟方法研究了送风温度波动对隧道恒温区域温度稳定性的影响，以确定温度波动的临界值。结果表明：当送风温度发生波动时，越靠近隧道两端区域，空气温度波动幅度越小；当送风温度波动值为±0.200 ℃时，在30 min内，隧道内恒温区域轴向的温度波动值在-0.013～0.180 ℃之间，径向的温度波动值在-0.029～0.187 ℃之间。因此，为了满足波荡器隧道恒温区域的温控精度（±0.200 ℃）要求，送风温度波动不得超过0.200 ℃。
Abstract：
Due to the particularity of scientific devices in the undulator tunnel, very strict requirements are put forward on the stability of the air temperature in the tunnel. Taking a constant-temperature undulator tunnel as the research object, a physical model is established using PHOENICS software, and the influence of the supply air temperature fluctuation on the temperature stability of the constant temperature area in the tunnel is studied by the numerical simulation method, in order to determine the critical value of temperature fluctuation. The results show that when the supply air temperature fluctuates, the closer the air is to the two ends of the tunnel, the smaller the temperature fluctuation. When the supply air temperature fluctuation value is ±0.200 ℃, the temperature fluctuation value is between -0.013 ℃ and 0.180 ℃ in the axial direction of the constant temperature area in the tunnel, and between -0.029 ℃ and 0.187 ℃ in the radial direction within 30 minutes. Therefore, in order to meet the requirement of temperature control accuracy (±0.200 ℃) in the constant temperature area of the undulator tunnel, the fluctuation of supply air temperature should not exceed 0.200 ℃.
Keywords:undulator; deeply buried super-long tunnel; supply air temperature fluctuation; temperature control accuracy; constant temperature area; temperature stability; critical value; high precision and constant temperature air conditioning