Simulation of ZnS infared window surface temperature response by arc-heated wind tunnel

In order to develop related researches of infared window, it is necessary to simulate surface temperature response of infrared window exactly. As the property of infrared transparence, it is hard to obtain the surface temperature of ZnS without disturbing the flow field, thus it is not possible to simulate the temperature response process of infrared window. A method was introduced to simulate the surface temperature response of ZnS infared window by arc-heated wind tunnel. First, the surface temperature of ZnS was measured by using 2Cr13 which had similar thermophysical properties with ZnS. Then, the temperature response process of infrared window was simulated. Finally, several tests were taken to identify this method by arc-heated wind tunnel. The result shows that 2Cr13 and ZnS have the same temperature response properties when tested in arc-heated wind tunnel flow field at temperatures between 150-250 ℃ . It is reliable to measure the surface temperature of ZnS by using 2Cr13 which has similar thermophysical properties with ZnS in arc-heated wind tunnel simulation test.