A study on the steady-state flow behavior of the flashing-driven open natural circulation system

Hou, Xiaofan; Jinrong, Qiu; Sun, Zhongning; Yao, Shiwei; He, Chuan; Xu, Yang; Wang, Shiming; Yang, Yongqiang

doi:10.1016/j.applthermaleng.2020.115903

Cited by 5 publications

(1 citation statement)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They discovered that theoretically flashing instabilities were not affected by inlet and exit restrictions due to strong integration of flow velocity and pressure drop in the system. (Hou et al, 2021) studied the steady-state response of flashing-driven open natural circulation system. They noted that the flow rate increased just a bit with an increase in riser length during the flashing flow while an increase in the diameter of the riser led to a considerable increase in the flow.…”

Section: Literature Reviewmentioning

confidence: 99%

The Effects of System Parameters on the Inception of Flashing Using Relap5

Olubunmi

Peng²,

Xia³

2022

mijst

View full text Add to dashboard Cite

Natural circulation systems (NCS) are prone to instabilities, they are more unstable compared to forced circulation systems as a result of the low driving head and nonlinearity of the system. Flashing instability is prominent in these systems at low pressure due to the presence of a long nonheated riser to enhance the driving force. RELAP5 code has been identified as one of the Best Estimate (BE) codes used in the analysis of the systems. The studies by different authors showed that the effects of system parameters on instability generally have gained the attention of researchers in recent years. However, these studies have not discussed how these parameters prevent or enhance the commencement of flashing instability. This we sought to achieve in this work, by zeroing in on the inception of flashing instability, by comparing what happened at different heat fluxes. The objective of this work is to investigate the effects of system parameters on the inception of flashing instability in a natural circulation system using the RELAP5 code. With the increase in inlet subcooling and height of the riser, flashing moved to the outlet of the riser, stabilizing the system. However, an opposite effect was observed with an increase in the inlet resistance.

show abstract

Section: Literature Reviewmentioning

confidence: 99%