Condensation dynamics of submerged steam jet in subcooled water

Hong, Sung Jong; Park, Goon Cherl; Cho, Seok; Song, Chul-Hwa

doi:10.1016/j.ijmultiphaseflow.2011.10.007

Cited by 101 publications

(25 citation statements)

References 17 publications

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“…In the frequency spectrum, two obvious dominant frequencies appear and they are named as the first dominant frequency and the second dominant frequency, respectively. According to the report of Hong et al (2012), the first dominant frequency is caused by the variation of steam cavity length and the theoretic oscillation frequency for the variation of steam cavity length is obtained which well matches the first dominant frequency obtained from the experiment. Qiu et al (2015) also proved that the first dominant frequency is generated by the variation of steam cavity length with the sonic and supersonic nozzles.…”

Section: Flow Pattern and Pressure Oscillationsupporting

confidence: 77%

“…According to the steam cavity length oscillation model at stable condensation region (Hong et al, 2012), condensation oscillation equilibrium position is the average length of steam cavity. But the position where the steam bubble oscillates is different with the steam cavity length oscillation.…”

Section: Relationship Between the Steam Cavity And Pressure Oscillatimentioning

confidence: 99%

“…Generally, combining the steam cavity length with the distribution of steam axial temperature, the coefficient of heat transfer can be obtained. Also the condensation oscillation frequency is also affected by the steam cavity length (Hong et al, 2012). For the steam jet pump, the maximum steam cavity length is the basis for the design of mixing section length.…”

Section: Maximum Steam Cavity Lengthmentioning

confidence: 99%

“…According to Hong et al (2012), the steam condensation oscillation for stable condensation region (SC) was generated by the variation of steam jet length. Based on that, a one-dimensional oscillation model was proposed to predict the steam condensation oscillation frequency.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Pressure oscillation and steam cavity during the condensation of a submerged steam jet

Zhao

Chen

Yuan

et al. 2015

Annals of Nuclear Energy

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a b s t r a c tSteam jet condensation is important in many industrial applications. In this work, the pressure oscillation and steam jet patterns during submerged jet condensation in quiescent water is investigated experimentally. Firstly, it is found that even at stable condensation region, the steam cavity length varies all the time and steam bubbles separate from the steam cavity periodically. With the variation of steam cavity length and separated bubble oscillation, condensation also undergoes oscillation. Along the axial direction, the pressure oscillation intensity increases first and then decreases gradually. There is an distinct pressure oscillation peak, and the peak position varies over a length-to-diameter ratio range of X/D = 2 to X/D = 7. The axial position of pressure oscillation peak corresponds to the end of steam cavity. Moreover, oscillation energy analysis shows that the oscillation energy generated by separated steam bubble is much higher than that generated by the steam cavity length variation. Finally, based on the relationship between the axial distribution of pressure oscillation and the steam cavity, a method is proposed to determine the maximum steam cavity length by measuring the pressure oscillation distributions. The predicted deviation is only in range of ±16% for the test conditions.

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Section: Flow Pattern and Pressure Oscillationsupporting

confidence: 77%

Section: Relationship Between the Steam Cavity And Pressure Oscillatimentioning

confidence: 99%

Section: Maximum Steam Cavity Lengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pressure oscillation and steam cavity during the condensation of a submerged steam jet

Zhao

Chen

Yuan

et al. 2015

Annals of Nuclear Energy

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show abstract

“…Youn et al (2003) observed intermittent pulses of high dynamic pressure in the chugging region. Hong et al (2012) studied the dominant frequency in regions of stable condensation and interfacial oscillation condensation, and proposed a prediction model basing on the balance of kinetic energy. While Qiu et al (2014a, b) investigated the dominant frequency in condensation oscillation and stable condensation regimes.…”

Section: Introductionmentioning

confidence: 99%