| Autor: |
A. B. Kapranova, S. V. Neklyudov, A. M. Melzer, A. E. Lebedev |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Vestnik IGEU. :58-64 |
| ISSN: |
2072-2672 |
| DOI: |
10.17588/2072-2672.2020.3.058-064 |
| Popis: |
The energy industry needs reliable, environmentally friendly control valves, which include the category of control valves. The creation of conditions for reducing the intensity of cavitation effects at the initial stages of its development determines the main purpose of the study which aims to prevent possible negative consequences of developed cavitation, which in their turn include erosion of the flowing surfaces of the elements of the specified equipment and vibrations that go beyond operating standards. One of the possible ways to solve the problem is to use the process of throttling fluid flows in the working volume of the control device. The particular interest is paid to the mathematical description of the mechanism of formation of cavitation bubbles in terms of gas–vapor system. To obtain analytical results for describing the behavior of the gas–vapor system of the macro-system of cavitation bubbles, we used the authoring stochastic model of the cavitation bubbles formation process in the flow part of the axial valve. The model was constructed on the basis of the energy method in the framework of the equilibrium representation of states of an energetically closed macro-system. The dependence of the random component of the angular momentum of the cavitation bubble on the flow coefficient of the valve and the conditional diameter of its flow cross section for various ratios of gas and vapor concentration inside the bubbles has been analysed. The implementation of the process of throttling fluid flows in the control valve using the proposed design solution to the separator–external locking shell allows reducing the random component of the angular momentum of the cavitation bubble and increasing the valve throughput coefficient at various stages of the separator opening. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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