Yang Jiann C
Fire Research Division Engineering Laboratory National Institute of Standards and Technology Gaithersburg, MD 20899, U.S.A.
Int J Therm Sci. 2018;130. doi: 10.1016/j.ijthermalsci.2018.04.041.
An analysis of a circular thin-foil gage is presented that includes transient effects, convective heat transfer, and an arbitrary time-varying boundary condition at the foil edge to account for fluctuations in cooling water temperature. The governing energy equation is solved using Laplace transform to obtain the temporal and spatial temperature distributions of the foil. Under constant temperature at the foil edge and constant thermal radiative heat flux, closed-form response curves for the gage under various modes of heat transfer are provided. Steady-state results are also presented as limiting cases.
本文对圆形薄箔应变片进行了分析,其中包括瞬态效应、对流换热以及箔片边缘任意随时间变化的边界条件,以考虑冷却水温的波动。通过拉普拉斯变换求解控制能量方程,得到箔片的时间和空间温度分布。在箔片边缘温度恒定和热辐射热通量恒定的情况下,给出了应变片在各种传热模式下的闭式响应曲线。稳态结果也作为极限情况给出。