Hydraulic and gas-dynamic models of a steam-water mixture flow in a granular bed
| Autor: | P. V. Khan, E. A. Tairov |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Journal of Physics: Conference Series. 1382:012101 |
| ISSN: | 1742-6596 1742-6588 |
| DOI: | 10.1088/1742-6596/1382/1/012101 |
| Popis: | The paper presents a comparative analysis of the hydraulic and gas-dynamic models of a steam-water mixture flow through a granular bed. The analysis is carried out using experimental data obtained at an inlet pressure of 0.6 - 15.5 MPa, flow quality of 0.002 - 0.3, and mass velocity through a cross-section of a packed bed from 44.5 to 410 kg/(m2s). In the hydraulic model, with a view to improving the accuracy, the algebraic calculation of an average pressure is replaced with numerical integration over the bed height. In the gas-dynamic model, which allows analytical integration, refined constitutive relations are proposed. An analysis of the obtained results indicates that the gas-dynamic model provides a good description of experimental data, whereas the hydraulic model leads to a considerable error in calculation in the case of large relative pressure drops. |
| Databáze: | OpenAIRE |
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