3D打印高温合金阀体壁面复合传热系数研究

Composite heat transfer coefficient of 3D-printed superalloy valve body wall

燃气阀用于控制高温燃气的流量和流路开闭,某燃气阀阀体由高温合金材料通过3D打印而成。阀体结构设计时需要了解阀体工作时各部位的温度分布情况,阀体壁面复合传热系数是进行传热学计算和仿真的关键参数。在热试车试验中,通过热电偶测得阀体表面不同部位的温度变化情况,然后通过ANSYS软件进行匹配仿真,使仿真结果与试验测试结果匹配,获得了强制对流下的燃气阀壁面复合传热系数,并进行了温度计算复核,验证了热仿真的准确性,为类似燃气阀的设计提供了参考和依据。

Gas valve is used to control the flow rate and flow path of high-temperature gas.In this study a gas valve body made of superalloy through 3 D printing is taken as the research object.When designing the structure of the valve body,it is necessary to know the temperature distribution of each part of the valve body while working.The composite heat transfer coefficient of the valve body wall is key to the heat transfer calculation and simulation.In the thermal test,the temperature change of different parts of the valve body surface is measured by thermocouple,and then matching simulation is carried out by ANSYS software.The simulation results are matched with the test results,and the composite heat transfer coefficient of the valve wall surface under forced convection is obtained.The accuracy of the thermal simulation is verified by checking the temperature calculation.This study has provided reference and basis for the design of similar gas valves.