高速旋转氚钛靶系统热应力分析

Thermal Stress Simulation of T-Ti target Rotating at High Speed

建立了旋转靶的三维模型并对其进行了网格划分,利用ANSYS Workbench Fluent对旋转靶的温度分布进行了计算,得到了靶面温度分布云图。最后将FLUENT计算出的温度分布数据提取出来,并将之作为温度载荷引入至ANSYS Mechanical,利用间接热分析法对旋转靶进行了热应力分析,得到了不同管压下的旋转靶等效应力及总位移分布云图。

The 3-D distribution of temperature in the tritium-titanium （T-Ti） target rotating at a high speed,used to generate neutron beam, were empirically approximated, physically modeled and numerically simulated with software AN- SYS Workbench Fluent. The impact of the temperature, centrifugal force and pressure of water coolant, on the thermal stress of T-Ti target was investigated. The thermal stress distribution of the T-Ti target was numerically derived in terms of the simulated temperature distribution with software ANSYS mechanical. The dependence of the distributions of total dis- placement and equivalent stress on the pressure was calculated. The simulated results show that the highest temperature of the T-Ti target is 160℃ ,40℃ below the safety limit;and that the maximum stress of 253 MPa at 2-atm,3 MPa higher than the allowable stress of the oxygen-free Cu target, may possibly result in failure of the target.