Two-layer transient heat transfer using impulse response methods

Solutions to the inverse heat conduction problem (IHCP) are methods that can be used to quantify sur -face heat flux in multi-layer materials for components in which there are limited subsurface (internal) temperature measurements, such as coated components. A critical consideration is to capture high fre-quency fluctuations using a practical heat flux sensor. To that end, this paper highlights key parameters for calculating accurate surface heat transfer. Specifically, this research extends the available solutions to the IHCP for multi-substrate structures through an impulse response methodology. The sensitivity of the impulse method was quantified with respect to practical measurements. When compared to the inverse case, the impulse method resulted in lower errors when calculating surface heat flux over a range of conditions. Overall, this work provides a foundation for deducing heat flux from a subsurface heat flux sensor while maintaining a high-frequency response. (c) 2022 Elsevier Ltd. All rights reserved.

Automated summary

This research extends the solutions to the inverse heat conduction problem (IHCP) using an impulse response methodology, which allows quantification of surface heat flux in multi-layer materials for components with limited subsurface temperature measurements. Comparing the impulse method to the inverse method, the impulse method exhibits lower errors in calculating surface heat flux across various conditions, providing a foundation for deducing subsurface heat flux while maintaining a high-frequency response.