基于闪光法的蒸汽发生器传热管导热系数的测量研究OA北大核心CSTPCD

For the problem that the thermal conductivity of heat transfer tube is difficult to obtain directly by theoretical analysis method or common testing method,a kind of device for measuring the thermal conductivity by laser flash method was designed.Four kinds of 690 alloy steam generator tubes manufactured by different manufacturers were tested using this measurement device.The fitting formula was established according to the testing data in the range of 20～400℃.By this formula the thermal conductivity of each type of 690 alloy steam generator tube at any temperature point within the suitable temperature range can be obtained directly,which provides reliable parameters for heat transfer of steam generator.