图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
传热学
影响因子: 0.404 5年影响因子: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN 打印: 1064-2285
ISSN 在线: 2162-6561

传热学

DOI: 10.1615/HeatTransRes.2016009673
pages 597-607

EFFECTS OF A NONCONDENSABLE GAS ON THE MICROBUBBLE EMISSION BOILING

Jiguo Tang
Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin, Heilongjiang 150001, China; State Key Laboratory of Hydraulics and Mountain River Engineering, College of Hydraulic and Hydra-electric Engineering, Sichuan University, Chengdu, Sichuan, 610207, China
Changqi Yan
Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin, Heilongjiang 150001, China
Licheng Sun
State Key Laboratory of Hydraulics and Mountain River Engineering, College of Hydraulic and Hydra-electric Engineering, Sichuan University, Chengdu, Sichuan, 610207, China
Guangyu Zhu
Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin, Heilongjiang 150001, China

ABSTRACT

Experiments on subcooled pool boiling were conducted to study the effects of a noncondensable gas on heat transfer performance and bubble behaviors in the regime of microbubble emission boiling (MEB). Snapshots of bubble behaviors were taken with the aid of a high-speed video camera (Photron: Fastcam SA5). The experimental results show that the noncondensable gas can extend the transition process from nucleate boiling to MEB and enlarge the emitted microbubbles from coalescing bubbles in MEB. A vapor film with a violently waving interface that for a long time covers the heating surface is observed for subcooled boiling of nondegassed water rarely found in the MEB of degassed water. In addition, it is also found that the noncondensable gas can weaken the inertial shock of liquid caused by condensation and may result in a collapse of a vapor bubble. Therefore, according to these findings, it can be considered that the noncondensable gas can tend to inhibit the collapse of a vapor film, resulting in a reduction of the bubble collapse frequency. This may be for this reason that the noncondensable gas could deteriorate the heat transfer performance in the regime of MEB.


Articles with similar content:

OBSERVATION OF COALESCENCE BEHAVIORS OF MULTIPLE NUCLEATION BUBBLES IN SUBCOOLED FLOW BOILING
First Thermal and Fluids Engineering Summer Conference, Vol.15, 2015, issue
Tomoaki Kunugi, Yang Cao, Zensaku Kawara, Takehiko Yokomine
MODELING OF ATOMIZATION AND VAPORIZATION PROCESS IN FLASH BOILING SPRAY
ICLASS 94
Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems, Vol.0, 1994, issue
Tokihiro Tsukamoto, T. Nishikori, Jiro Senda, Hajime Fujimoto, Y. Hojyo
EXPERIMENTAL ANALYSIS OF AEROSOL BEHAVIORS IN PRIMARY PIPING WITH ART CODE DURING SEVERE ACCIDENT
ICHMT DIGITAL LIBRARY ONLINE, Vol.9, 1995, issue
Haruyuki Sato, Akihide Hidaka, Takehito Yoshino, Kazuichiro Hashimoto, Jun Sugimoto
MODELLING OF HEAT TRANSFER PROCESSES IN FUEL CHANNELS OF RBMK-TYPE REACTORS
ICHMT DIGITAL LIBRARY ONLINE, Vol.13, 2008, issue
Eugenijus Uspuras, Algirdas Kaliatka, Mindaugas Vaisnoras
ENHANCED BOILING HEAT TRANSFER ON SURFACES PATTERNED WITH MIXED WETTABILITY
International Heat Transfer Conference 16, Vol.4, 2018, issue
Biao Shen, Sumitomo Hidaka, Koji Takahashi, Yasuyuki Takata, Junichiro Shiomi, Tomosuke Mine, Masamichi Kohno, Masayuki Yamada, Gustav Amberg