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Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods最新文献

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Numerical Simulation of Laminar Film Boiling Heat Transfer From Vertically Suspended Smooth Surfaces in Cryogenic Fluids Subjected to Constant Wall Heat Flux 恒壁热流下低温流体垂直悬浮光滑表面层流膜沸腾传热的数值模拟
Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods Pub Date : 1996-11-17 DOI: 10.1115/imece1996-0129
K. Akyuzlu, S. Malipeddi
{"title":"Numerical Simulation of Laminar Film Boiling Heat Transfer From Vertically Suspended Smooth Surfaces in Cryogenic Fluids Subjected to Constant Wall Heat Flux","authors":"K. Akyuzlu, S. Malipeddi","doi":"10.1115/imece1996-0129","DOIUrl":"https://doi.org/10.1115/imece1996-0129","url":null,"abstract":"\u0000 This study is aimed at solving the one-field conservation of mass, momentum, and energy equations for laminar film boiling from vertically suspended smooth surfaces in cryogenic fluids subjected to constant wall heat flux boundary condition. Solutions to the problem of laminar film boiling under constant wall temperature boundary condition have been obtained in the past using analytical and iterative techniques. Here, the governing equations are solved under constant heat flux boundary condition using an analytical method supplemented with curve fitting techniques. The procedure is iterative because it assumes the vapor film thickness to start the calculations and then uses the energy equation at the interface to check the accuracy of this assumption. A computer program was developed to integrate this iterative procedure with a scheme that repeats the calculations at different discrete locations along the heated surface to estimate the laminar film thickness and to generate the velocity and the temperature profiles within the film boundary. The numerical results are compared to the experimental results for a stainless steel plate vertically suspended in liquid nitrogen where the plate is heated by constant current. The numerical predictions are matched with the experimental results by using a calibration parameter that relates various properties of the liquid and the vapor.","PeriodicalId":324954,"journal":{"name":"Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114452384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental Study on PORV Stuck-Open Accident in INER Integral System Test Facility INER集成系统试验台PORV卡开事故试验研究
Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods Pub Date : 1996-11-17 DOI: 10.1115/imece1996-0102
T. J. Liu, C. Lee, W. Hong, Y. Chan, C. Y. Chang
{"title":"Experimental Study on PORV Stuck-Open Accident in INER Integral System Test Facility","authors":"T. J. Liu, C. Lee, W. Hong, Y. Chan, C. Y. Chang","doi":"10.1115/imece1996-0102","DOIUrl":"https://doi.org/10.1115/imece1996-0102","url":null,"abstract":"\u0000 Four scaled small break loss-of-coolant accident (LOCA) tests simulating the pressurizer power-operated relief valve (PORV) stuck-open accidents and the recovery actions in a pressurized water reactor (PWR) were performed at the INER Integral System Test (IIST) facility. The objectives of this study are to verify the effectiveness of emergency operating procedure and emergency core cooling system on reactor safety. The break sizes were volumetrically scaled down based on one and all three fully-opened PORVs which is equivalent to 0.46% and 1.37% cold leg flow area. The experimental results indicate that in case of high pressure injection (HPI) system failure, the rapid depressurization of the steam generators is proved to be an effective way in the depressurization of the reactor coolant system and the core cooling. If the high pressure safety injection operates normally, the core cooling can be adequately provided without operating the secondary bleeding during PORV stuck-open transient.","PeriodicalId":324954,"journal":{"name":"Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130338762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental Study on Flow Rate Measurement by Using Cross-Correlation of Temperature Fluctuations 利用温度波动相互关系测量流量的实验研究
Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods Pub Date : 1996-11-17 DOI: 10.1115/imece1996-0111
Xiaodong Sun, Z. Dai, Yi-Ho Weng, Jijun Xu
{"title":"Experimental Study on Flow Rate Measurement by Using Cross-Correlation of Temperature Fluctuations","authors":"Xiaodong Sun, Z. Dai, Yi-Ho Weng, Jijun Xu","doi":"10.1115/imece1996-0111","DOIUrl":"https://doi.org/10.1115/imece1996-0111","url":null,"abstract":"\u0000 The applicability of cross-correlation method based on fluid temperature fluctuations to flow rate measurement under steady flow condition is investigated with experiments by using an on-line, digital instrument developed by the authors. The thermocouple transducer design, the signal data pre-processing system and the correlator design with chip microprocessor 8031 are described. The experimental results show that the intrinsic temperature fluctuations existing naturally in flowing fluid are adequate to be detected. The method is proved to be a reliable and accurate one of flow rate measurement in turbulent flow. In laminar flow, the measurement is not so satisfactory.","PeriodicalId":324954,"journal":{"name":"Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129039143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A Universal Bubble-Growth Equation for Pure Liquids and Binary Solutions With a Non-Volatile Solute 具有非挥发性溶质的纯液体和二元溶液的通用气泡生长方程
Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods Pub Date : 1996-11-17 DOI: 10.1115/imece1996-0125
O. Miyatake, Itsuo Tanaka, N. Lior
{"title":"A Universal Bubble-Growth Equation for Pure Liquids and Binary Solutions With a Non-Volatile Solute","authors":"O. Miyatake, Itsuo Tanaka, N. Lior","doi":"10.1115/imece1996-0125","DOIUrl":"https://doi.org/10.1115/imece1996-0125","url":null,"abstract":"\u0000 A simple equation suitable for predicting the growth rate of a vapor bubble in uniformly-superheated pure liquids and in binary solutions with a non-volatile solute was developed. The equation also improves on the popular pure-liquid bubble growth expression of Mikić et al. (1970) in that it is valid throughout the bubble growth history, i. e. in the surface-tension-, inertia-, and heat-transfer-controlled regimes, it accounts for bubble growth acceleration effects, and uses correctly-related and variable fluid properties. It was found to agree very well with experimental data for pure water and for aqueous NaCl solutions As the bubble growth in superheated solutions with a non-volatile solute was found to be quite insensitive to diffusion and non-equilibrium effects in a broad range of common solution properties, this equation is likely to be universally valid for many liquids and solutions.","PeriodicalId":324954,"journal":{"name":"Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129269105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of Bubble Motion on Chord Length Measured by Double-Needle Conductance Probe 气泡运动对双针电导探头测弦长度的影响
Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods Pub Date : 1996-11-17 DOI: 10.1115/imece1996-0097
H. Monji, G. Matsui
{"title":"Effects of Bubble Motion on Chord Length Measured by Double-Needle Conductance Probe","authors":"H. Monji, G. Matsui","doi":"10.1115/imece1996-0097","DOIUrl":"https://doi.org/10.1115/imece1996-0097","url":null,"abstract":"\u0000 This study deals with effects of bubble motion on average chord length of bubbles measured by a double-needle type conductance probe system. So far, known estimation methods for bubble size are restricted to only a spherical bubble. For the estimation of deformed bubble size, the rocking motion of a bubble should be considered. Furthermore, in order to obtain the value of bubble size near the wall, the relation between the size and average chord length of bubbles should be derived taking both the restricted bubble motion and the probe position into account. The results show that taking the rocking motion of a bubble into account, the bubble size is estimated accurately for an oblate spheroidal bubble, and that the restriction of the bubble motion by the wall induces the peak in the chord length distribution, even if the bubble size is uniform.","PeriodicalId":324954,"journal":{"name":"Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114977872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling of Two-Phase Flow Instabilites During Startup Transients Utilizing RAMONA-4B Methodology 基于RAMONA-4B方法的启动瞬态两相流不稳定性建模
Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods Pub Date : 1996-10-01 DOI: 10.1115/imece1996-0090
J. Paniagua, U. Rohatgi, V. Prasad
{"title":"Modeling of Two-Phase Flow Instabilites During Startup Transients Utilizing RAMONA-4B Methodology","authors":"J. Paniagua, U. Rohatgi, V. Prasad","doi":"10.1115/imece1996-0090","DOIUrl":"https://doi.org/10.1115/imece1996-0090","url":null,"abstract":"\u0000 RAM0NA-4B code is currently under development for simulating thermal hydraulic instabilities that can occur in Boiling Water Reactors (BWRs) and the Simplified Boiling Water Reactor (SBWR). As one of the missions of RAMONA-4B is to simulate SBWR startup transients, where geysering or condensation-induced instability may be encountered, the code needs to be assessed for this application. This paper outlines the results of the assessments of the current version of RAMONA-4B and the modifications necessary for simulating the geysering or condensation-induced instability. The test selected for assessment are the geysering tests performed by Prof. Aritomi (1993).","PeriodicalId":324954,"journal":{"name":"Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods","volume":"168 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127985424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Interfacial Shear Modelling in Two-Phase Annular Flow 两相环空流动界面剪切模拟
Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods Pub Date : 1996-07-01 DOI: 10.2172/350939
Ranganathan Kumar, D. Edwards
{"title":"Interfacial Shear Modelling in Two-Phase Annular Flow","authors":"Ranganathan Kumar, D. Edwards","doi":"10.2172/350939","DOIUrl":"https://doi.org/10.2172/350939","url":null,"abstract":"\u0000 A new interfacial shear stress model called the law of the interface model, based on the law of the wall approach in turbulent flows, has been developed and locally applied in a fully developed, adiabatic, two-phase annular flow in a duct. Numerical results have been obtained using this model in conjunction with other models available in the literature that are required for the closure of the continuity and momentum equations. These results have been compared with droplet velocity data (using laser Doppler velocimetry and hot film anemometry), void fraction data (using gamma densitometry) and pressure drop data obtained in a R-134A refrigerant test facility. Droplet velocity results match the experimental data well, however, the prediction of the void fraction is less accurate. The poor prediction of void fraction, especially for the low void fraction cases, appears to be due to the lack of a good mechanistic model for entrainment.","PeriodicalId":324954,"journal":{"name":"Heat Transfer: Volume 3 — Experimental Studies in Multiphase Flow; Multiphase Flow in Porous Media; Experimental Multiphase Flows and Numerical Simulation of Two-Phase Flows; Fundamental Aspects of Experimental Methods","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129719514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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