氚钛靶系统靶温升瞬态分析的方法研究

Transient Analysis of Temperature Rise in Tritium-Titanium Target System

完成了中子发生器的关键装置——真空氚钛靶系统的设计方案,并对影响氚钛靶寿命的各个因素及靶温升对氚钛靶寿命的影响做了介绍,着重研究旋转靶的温度变化瞬时分析的新方法。该方法将旋转靶的受热区域分为若干个相等的受热点,利用循环往复的"跳格"加热的方式完成旋转靶的瞬态分析,计算结果表明:通过该方法,能够控制旋转靶的靶点温升在允许温度范围之内。

A novel vacuum tritium-titanium（T-T i）target system, a key component of the neutron generator, was de- signed, and the influence of the major factors, particularly the temperature rise of the T-Ti target, on its lifetime was evalu- ated. The deuterium-sputtering heating of the water-cooled, fast rotating T-Ti targetplate wasempirically approximated, physically modeled, and numerically simulated in finite element method with software package ANSYS Workbench Fluent 13.0 Since the narrow deuteriurnsputtering beam only heats a small spot, roughly in a diameter of the deuterium beam, once for a short time in the circular band of the target in one cycle, each spot is approximately heated at a frequency strictly correlated to the rotation speed of the target, simplifying the transient analysis. The simulated results show that the temperature rise of the rotating target can be well controlled bellow the allowable range.