Experimental Study on Flow Boiling of Deionized Water in a Horizontal Long Small Channel

Huang, Qian; Jia, Li; Dang, Chao; Yang, Lixin

doi:10.1007/s11630-018-0996-1

Cited by 19 publications

(9 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerical solutions are obtained by using STAR-CCM+. As shown the numerical model is almost the same to that experimental test section studied by Huang (2018).Thermocouple holes and bolt holes have little effects on heat transfer in the channel. They are removed to simplify the numerical model so as to reduce the number of grids and increase computational efficiency.…”

Section: Numerical Model Drift Flux Mathematical Modelmentioning

confidence: 56%

“…Yan et al (2018) found that the bubble size during sliding in narrow rectangular channel are mainly affect by the liquid subcooling and wall superheat. Huang (2018) and Huang et al (2018) found that the throat-annular flow pattern just generated in the horizontal small rectangular channel at high pressure and the heat transfer coefficients along the channel were higher than those of lower pressure with experimental conditions same. Kwon et al (2018) proposed that film boiling occurred in the small semicircular channel because of the large temperature difference between the hot side and the cold side.…”

Section: Introductionmentioning

confidence: 91%

“…T i refers to the thermocouple temperature. Huang (2018) and Huang et al (2018) conducted the subcooled flow boiling experiments in the rectangular small channel with the above introduced test loop. The heat transfer coefficients along the flow direction were reported with the uncertainty of ±6.98%.…”

Section: Experimental Data Reductionmentioning

confidence: 99%

“…The heat transfer coefficients along the flow direction were reported with the uncertainty of ±6.98%. The flow patterns in the rectangular small channel at a low pressure and a high pressure from Huang (2018) and Huang et al (2018) are shown in Figure 3. As shown seven flow patterns were defined along the path in the experimental visualization and the proportion of every flow patterns in the flow path was described in the literature.…”

Section: Experimental Data Reductionmentioning

confidence: 99%

“…And the empirical correlations of drift flow velocities and distribution parameters for different flow patterns in many drift flow models are available not only for conventional scale vertical channel (Hibiki and Ishii, 2003;Mei et al, 2018) but also for the horizontal flow of small channels (Bhagwat and Ghajar, 2014;Ran et al, 2018;Rassame and Hibiki, 2018). Therefore, based on the experimental data about heat transfer coefficients in the small rectangular channel of plate OTSG obtained by the researchers in our team (Huang, 2018;Huang et al, 2018), the drift flux model is applied to simulating the flow boiling heat transfer coefficients in the small rectangular channel of the plate OTSG in this paper. And the distribution parameters and the averaged drift velocities of drift flux model are illustrated in empirical correlations developed by Bhagwat and Ghajar (2014).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Numerical Simulation of Flow Boiling in Small Channel of Plate OTSG

et al. 2020

Self Cite

View full text Add to dashboard Cite

The plate OTSG (once-through steam generator) with channel diameter of 1-3 mm has high volume-power ratio and powerful resistance to high temperature and high pressure. It can well satisfy the needs of high heat transfer performance and good security of integrated pressure vessel in nuclear power. Heat transfer characteristics of flow boiling in the channel have aroused increasing concerns from scholars in this field. In this paper, based on the experimental results achieved by the researcher in our team, the drift flux model is applied to simulate the flow boiling heat transfer coefficients in the rectangular channel with equivalent diameter of 1.7 mm to further explore the flow boiling mechanism in the channel. The drift velocities and the distribution parameters of drift flux model are obtained by the empirical correlations of the horizontal flow. The simulation boundary conditions comply to the experimental conditions, the simulation resolutions are obtained by using STAR-CCM+. The simulation results indicate that the heat transfer coefficients trends along the flow direction are consistent with the trends of the experimental data. The drift velocities and the distribution parameters have little effect on the heat transfer coefficients of the horizontal small channel. When the drift velocity is 0 and the distribution parameter is 1, compared with the experimental data, the heat transfer coefficients in the single-phase liquid convective heat transfer region of the flow at high pressure are well higher, while those in the region that from bobble flow to the slug flow of the flow increase, even though they are still lower in annular flow region. The error between the predicted and the experimental is from −50 to +50%. Similarly, the model predicted heat transfer coefficients during subcooled flow boiling at low pressure are generally lower than experimental data. And the error between the predicted and the experimental is from −60 to +10%.

show abstract

Section: Numerical Model Drift Flux Mathematical Modelmentioning

confidence: 56%