The effects of variable conductivity on unsteady heat transfer in deposits
A finite-difference model was used to investigate the unsteady heat transfer in a combustion-chamber deposit. Experimental surface temperature measurements were used as boundary conditions for the computational study. The temperature dependence of the deposit conductivity was modeled using a power law relationship, k = A·TB. The numerical value of the exponent, B, was estimated from data available in the literature, and the value of A was then determined from the experimental data. Both the amplitude and the time lag of the temperature fluctuations at the deposit-wall interface were investigated and used to estimate a value of deposit heat capacity, ρC. Both the instantaneous heat flux at the deposit surface, and the total heat loss were investigated.
SAE Technical Papers
The effects of variable conductivity on unsteady heat transfer in deposits.
SAE Technical Papers.
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