Experimental study of sound emission in subcooled pool boiling on a small heating surface

Tang, Jiguo; Xie, Gongnan; Bao, Jianjun; Mo, Zhengyu; Liu, Hongtao; Du, Min

doi:10.1016/j.ces.2018.05.002

Cited by 40 publications

(10 citation statements)

References 46 publications

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“…The peak shifted to higher frequencies with increasing heat flux. The peak value was ~760 Hz, similar to the peak value reported in a previous study [13]. However, the peak spectral value corresponding to the vibration of the BBR plate was ~560 Hz under low-heat-flux conditions.…”

Section: Acoustic and Motion Spectra Of The Vibration Platesupporting

confidence: 88%

Visualization and Sound Measurements of Vibration Plate in a Boiling Bubble Resonator

Ono

Unno

Yuki

et al. 2021

Fluids

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We developed a boiling bubble resonator (BBR) as a new heat transfer enhancement method aided by boiling bubbles. The BBR is a passive device that operates under its own bubble pressure and therefore does not require an electrical source. In the present study, high-speed visualization of the flow motion of the microbubbles spouted from a vibration plate and the plate motion in the BBR was carried out using high-speed LED lighting and high-speed cameras; the sounds in the boiling chamber were simultaneously captured using a hydrophone. The peak point in the spectrum of the motion of the vibration plate and the peak point in the spectrum of the boiling sound were found to be matched near a critical heat-flux state. Therefore, we found that it is important to match the BBR vibration frequency to the condensation cycle of the boiling bubble as its own design specification for the BBR.

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Section: Acoustic and Motion Spectra Of The Vibration Platesupporting

confidence: 88%

Visualization and Sound Measurements of Vibration Plate in a Boiling Bubble Resonator

Ono

Unno

Yuki

et al. 2021

Fluids

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“…To gain insight into the mechanism of the BBR, we also analyzed the sound emission. Previously, boiling sound has been studied in subcooled pool boiling (Tang, 2018), including the microbubble emission boiling (MEB) regime (Inada et al, 1981). These studies reported that the bubble lifetime decreased with increasing wall superheat, whereas the bubble size barely changed.…”

Section: In a Boiling Bubble Resonatormentioning

confidence: 99%

Effect of the gap height between the vibration plate and heating surface on boiling heat transfer in a boiling bubble resonator

Unno

Yuki

Taniguchi

et al. 2021

JTST

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“…The experimental apparatus to study MEB is shown in Figure , which has been introduced in our previous work in detail . It is mainly composed of a water tank and a copper block.…”

Section: Experimental Systemmentioning

confidence: 99%

“…Similar to works by Ando et al a “quasi‐heat flux” was used to estimate the heat transfer. Based on Fourier's law and the method of least‐square fitting, the quasi‐heat flux, wall temperature, and heat transfer coefficient could be calculated by assuming a one‐dimensional temperature distribution in the copper block:

q = λ_{Cu} \frac{\sum_{i = 1}^{3} x_{i} T_{i} - \frac{1}{3} \sum_{i = 1}^{3} x_{i} \sum_{i = 1}^{3} T_{i}}{\sum_{i = 1}^{3} {x_{i}}^{2} - \frac{1}{3} {({false\sum}_{i = 1}^{3} x_{i})}^{2}}

T_{w} = \frac{1}{3} \sum_{i = 1}^{3} T_{i} - \frac{1}{3} \frac{\sum_{i = 1}^{3} x_{i} T_{i} - \frac{1}{3} \sum_{i = 1}^{3} x_{i} \sum_{i = 1}^{3} T_{i}}{\sum_{i = 1}^{3} {x_{i}}^{2} - \frac{1}{3} {({false\sum}_{i = 1}^{3} x_{i})}^{2}} \sum_{i = 1}^{3} x_{i}

h = \frac{q}{T_{w} - T_{b}}

…”

Section: Experimental Systemmentioning

confidence: 99%

Experimental investigation of transition process from nucleate boiling to microbubble emission boiling under transient heating modes

Tang

Sun

et al. 2019

AIChE Journal

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This study investigated the transition from nucleate boiling to microbubble emission boiling (MEB) on a small heating surface under transient heating modes. During the short unstable boiling process after critical heat flux with a rapid increase in wall temperature, capillary waves were observed over the vapor film at subcooling of 30–40 K. The visualization results in this process demonstrated that the partial collapse of vapor film induced strong jet toward the heating surface and therefore avoided complete dryout thereon. This mechanism certainly plays an important role in the transition to stable MEB. Further comparison between the wall temperature and boiling states indicates that the wall temperature at onset point of stable MEB is determined by the predominance of MEB mode over film boiling in the transition process. Effects of liquid subcooling and surface oxidation on the transition process were also investigated at the same time.

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Experimental study of sound emission in subcooled pool boiling on a small heating surface

Cited by 40 publications

References 46 publications

Visualization and Sound Measurements of Vibration Plate in a Boiling Bubble Resonator

Visualization and Sound Measurements of Vibration Plate in a Boiling Bubble Resonator

Effect of the gap height between the vibration plate and heating surface on boiling heat transfer in a boiling bubble resonator

Experimental investigation of transition process from nucleate boiling to microbubble emission boiling under transient heating modes

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