RT Journal Article
ID 5fa102411abde236
A1 Stolyarov, Evgeniy Pavlovich 
T1 EFFECTS OF TRANSITION PROCESSES ON SYSTEMATIC ERRORS OF HEAT MEASURING IN WIND TUNNELS
JF TsAGI Science Journal
JO TSAGI
YR 2015
FD 2016-08-19
VO 46
IS 8
SP 769
OP 782
K1 intermittent wind tunnel
K1 transition process
K1 impulse transfer function
K1 two-layered environment
K1 heat flux density
K1 inverse heat transfer problem
K1 similarity parameters
K1 asymptotic behavior
AB A procedure to estimate the heat flux density is presented based on results of temperature measurements using an elementary thin-film sensor. It is shown that the heat flux density cannot be measured but can be determined by means of convolution of the corresponding impulse transfer function with the time derivative from the temperature measured inside the sensor. Well-behaved analytic expressions of the impulse transfer functions are obtained using the inverse Laplace transformation of the inverse heat transfer problem, and a numerical solution method for short time periods is presented, with a provision for transition processes. Systematic errors are estimated, which depend on the main similarity parameters and the number of experiments.



PB Begell House
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