Peer-reviewed veterinary case report
Research on the ejection performance of an ejector with low pressure and back pressure.
- Year:
- 2025
- Authors:
- Chen C et al.
- Affiliation:
- Wenzhou University of Technology · China
Abstract
This study investigates the influence of back pressure on the mass ejection coefficient (u) of low-pressure methane-air ejectors through a combined approach of one-dimensional mathematical modeling and computational fluid dynamics (CFD) simulations. By establishing a quadratic relationship between u and back pressure (h<sub>c</sub>), we reveal three distinct operational regimes: a slow growth phase, a rapid escalation phase, and a critical degradation phase. CFD results validate the theoretical model with a coefficient of determination (R<sup>2</sup>) of 0.9941 in the quadratic region. A key finding is the identification of a linear correlation between the critical back pressure (h<sub>c,crit</sub>) and nozzle pressure (h<sub>n</sub>), expressed as h<sub>c,crit</sub> = - 0.0629 h<sub>n</sub> + 0.8966 Pa. This work provides actionable guidelines for optimizing ejector geometry and operating conditions in residential gas appliances.
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Search related cases →Original publication: https://europepmc.org/article/MED/40335682