Weight-size Optimization of Aerospace Propulsion System Heat Exchangers
| Autor: | A. D. Kliukvin, B. A. Kunikeev |
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| Jazyk: | ruština |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Aèrokosmičeskij Naučnyj Žurnal, Vol 1, Iss 05, Pp 1-11 (2016) Aèrokosmičeskij Naučnyj Žurnal, Vol 1, Iss 05, Pp 1-11 (2015) |
| ISSN: | 2413-0982 |
| Popis: | The paper offers an algorithm for optimizing weight-size parameters of heat exchangers (HE), which allows to take into account not only the size and weight of the matrix, but also the weight and size of the HE tubes and shell.The feature of the proposed algorithm is that a simplified HE model (matrix, shell, and tubes) in assembly rather than HE matrix is considered during the optimization calculations. Thus, there are additional parameters to be specified such as wall thickness of tubes and shell, form and arrangement of tubes, coolant flow circuit. Simultaneously with the thermal-hydraulic calculation and estimate of HE weight-size parameters, as a whole, tube opening angles are optimized and a problem of splitter baffle to be in them is solved.In the context of simple calculation of air-to-air recuperative heat exchanger with a cross (one-way) circuit coolant flow and plate-fin heat exchange surfaces with short plate fin (PlR1 - PlR12) are compared different methods for the HE weight-size optimization.It is shown that the techniques and algorithms using natural (size, area of heat transfer, mass) characteristics or derivatives (cubic coefficient) of the HE matrix, as the optimization criteria of variants calculation, provide only a very rough estimate of the HE weight-size characteristics, as a whole. Their use may result in non-optimal choice (in mass and size) of the HE model that when using in aviation and space technology leads to an additionally increasing mass of the aircraft.Using the proposed technique allows more accurate (as compared to the methods based on the estimation of the matrix parameters) assessment of weight-size characteristics of designed HE, as an explicit calculation involves parameters of tubes and shell with their share of the HE mass being more than half. |
| Databáze: | OpenAIRE |
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