Numerical Simulation of Full-Scale Three-Dimensional Fluid Flow in an Oscillating Reactor
| Autor: | Houjun Gong, Mengqi Wu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
resistance coefficient
Economics and Econometrics Materials science 020209 energy Energy Engineering and Power Technology 02 engineering and technology General Works Steam generator (boiler) Physics::Fluid Dynamics 0202 electrical engineering electronic engineering information engineering Fluid dynamics oscillating reactor Computer simulation oscillating elevation Oscillation Renewable Energy Sustainability and the Environment Mechanics 021001 nanoscience & nanotechnology Volumetric flow rate Coolant Amplitude Fuel Technology Flow (mathematics) 0210 nano-technology flow field oscillating angle |
| Zdroj: | Frontiers in Energy Research, Vol 9 (2021) |
| ISSN: | 2296-598X |
| DOI: | 10.3389/fenrg.2021.674615 |
| Popis: | Marine reactors are subjected to additional motions due to ocean conditions. These additional motions will cause large fluctuation of flow rate and change the coolant flow field, making the system unstable. Therefore, in order to understand the effect of oscillating motion on the flow characteristics, a numerical simulation of fluid flow is carried out based on a full-scale three-dimensional oscillating marine reactor. In this study, the resistance coefficients of the lattice, rod buddle and steam generator are fitted, and the distribution of flow rate, velocity as well as pressure in different regions is investigated through the standard model. After additional oscillation is introduced, the flow field in an oscillating reactor is presented and the effect of oscillating angle and elevation on the flow rate is investigated. Results show that the oscillating motion can greatly change the flow field in the reactor; most of the coolant circulates in the downcommer and lower head with only a small amount of coolant entering the core; the flow fluctuation period is consistent with the oscillating period, and the flow variation patterns under different oscillating conditions are basically the same; since the flow amplitude is related to oscillating speed, the amplitude of flow rate rises when decreasing the maximum oscillating angle; the oscillating elevation has little effect on the flow rate. |
| Databáze: | OpenAIRE |
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