首页|NUMERICAL ESTIMATION OF HEAT TRANSFER PARAMETERS: A STUDY ON INVERSE METHODS IN COMBUSTION CHAMBERS
NUMERICAL ESTIMATION OF HEAT TRANSFER PARAMETERS: A STUDY ON INVERSE METHODS IN COMBUSTION CHAMBERS
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NETL
Inverse heat transfer problems have consistently remained a crucial focal point in research and improvement efforts。 These problems typically provide an opportunity to approximate the determination of a property or condition， in cases where it is not possible to measure a boundary condition or a thermophysical property of a material， using various methods based on measured values。 The unknown heat transfer can be estimated by using a parameter or function estimation approach with the inverse heat transfer method。 If the functional form of the unknown parameters is known， the inverse problem can be solved to determine several parameters within the function。 Conversely， if there is no information regarding the functional form of the problem， function estimation can be performed to find the solution。 In the thermal design of systems with complex heat flows， such as combustion chambers， it is important to clearly know the thermal loads to which the inner surface of the structure is subjected。 It is not possible to obtain these loads by direct measurements。 On the other hand， heat transfer parameters at the inner surface can be estimated by inverse methods using measurements taken from the outer surface。 With the inverse method mentioned in this study， the heat transfer parameters at the inner surface of a combustion chamber are numerically estimated using temperature measurements taken from the outer surface。 A generic combustion chamber is modelled by conduction based finite element method。 The unknown heat transfer parameters of the model are iteratively obtained by an optimization algorithm。 Subsequently， a variety of optimization methods are utilized to minimize predictive errors， thereby evaluating the uniqueness of the resulting solution。
Inverse heat transfer problemsCombustion chamberOptimization
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