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12
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vol 63 / December, 2020
Article

DOI 10.17586/0021-3454-2017-60-6-538-544

UDC 536.6

RETRIEVAL OF NON-STATIONARY HEAT FLOW BASED ON SOLUTION OF INVERSE PROBLEMS OF HEAT CONDUCTION

N. V. Pilipenko
ITMO University, Saint Petersburg, 197101, Russian Federation; Associate professor; Professor


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Abstract. The problem of non-stationary heat flux retrieval in shock and pulse aero- and hydrodynamic tubes is addressed. Peculiarities of the method of parameter identification for difference-differential models of heat transfer in a system containing heat flux inverter and the object of study is considered. Results obtained with the use of the described method are reported to agree well with results of other authors. Recommendations on improvement of the inverter parameters and decrease in the flux measurement uncertainty are formulated. Matrix of feedback, control and measurement obtained using the method allow to determine the dynamic characteristics of the inverter such as transient, pulsed, amplitude- and phasefrequency characteristics, and transfer function.
Keywords: temperature, heat flux, difference-differential model, measurement uncertainty, heat flux transducer

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