منابع مشابه
Estimating the unknown heat flux on the wall of a heat exchanger internal tube using inverse method
In the design of heat exchangers, it is necessary to determine the heat transfer rate between hot and cold fluids in order to calculate the overall heat transfer coefficient and the heat exchanger efficiency. Heat transfer rate can be determined by inverse methods. In this study, the unknown space-time dependent heat flux imposed on the wall of a heat exchanger internal tube is estimated by app...
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Abstract: Properly understanding heat flux characteristics is a crucial prerequisite to efficiently applying a regenerative burner in an aluminum reheating furnace. A series of experiments was conducted in this study in order to establish a database of the best available burners according to furnace temperature, excess air ratio, and flame combustion mode as they affect heat flux characteristic...
متن کاملTransient heat flux measurement using a surface junction thermocouple
A new form of surface junction thermocouple sensor has been developed and tested. The novel feature of the design is the use of a tapered fit between two coaxial thermocouple elements to form a thin, robust junction. The gauge has a response time on the order of 1 ms and is suitable for measuring large transient heat fluxes in hypervelocity wind tunnels. Asymptotic analysis is used to demonstra...
متن کاملDevelopment of a Direct-Measurement Thin-Film Heat Flux Array
A new thin film heat flux array (HFA) was designed and constructed using a series of nickel/copper thermocouples deposited onto a thin Kapton® polyimide film. The HFA is capable of withstanding temperatures up to 300°C and produces signals of 40 μV/(W/cm). As a result of its thin film construction, the HFA is able to resolve heat flux signals as fast as 32 ms. Calibrations were completed to det...
متن کاملMeasurement of Boundary Conditions - Surface Heat Flux and Surface Temperature
In order to understand a heat transfer phenomenon, it is sometimes very important to know the change in heat flux and temperature with time or the distribution of the heat flux and temperature on the surface of a heating block. Furthermore, with the development of computational thermal-fluid dynamics, experimental data that are of the CFD level, both spatially and temporally, are needed to vali...
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ژورنال
عنوان ژورنال: ERJ. Engineering Research Journal
سال: 2023
ISSN: ['1110-1180']
DOI: https://doi.org/10.21608/erjm.2023.174362.1231