Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India最新文献

Experimental analysis of direct contact condensation during vertical injection of steam on subcooled water pool 过冷水池垂直注入蒸汽时直接接触冷凝的实验分析

Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India Pub Date : 2022-11-30 DOI: 10.1615/ihmtc-2021.2220

Saurabh Patel, Sharey Deep Guleria, Aniket Pati, Parmod Kumar

{"title":"Experimental analysis of direct contact condensation during vertical injection of steam on subcooled water pool","authors":"Saurabh Patel, Sharey Deep Guleria, Aniket Pati, Parmod Kumar","doi":"10.1615/ihmtc-2021.2220","DOIUrl":"https://doi.org/10.1615/ihmtc-2021.2220","url":null,"abstract":"Experiments have examined the phenomenon of direct contact condensation when steam is injected vertically into the subcooled water pool. The investigation is carried out by varying the steam mass flow rate and submergence depth of the steam injection pipe in the range of 10-50 kg/hr and 1-13 cm, respectively. The behavior of the bubble that appeared at the pipe outlet, transient heat transfer coefficient, pressure variation in the steam injection pipe, and its associated frequency have been analyzed. The images captured by high speed-camera showed different bubble shapes. The overall cycle time of bubble evolution has decreased with an increase in the mass flow rate and increased with an increase in the pipe submergence depth. The time averaged heat transfer coefficient increased with an increase in the mass flow rate and decreased with the rise of the pipe submergence depth. The pressure drop within the steam injection pipe shows the parabolic variation with an increase in the mass flow rate and is slightly influenced by the submergence depth due to changes in interfacial structures within the pipe. The peak frequency associated with the pressure has increased with an increase in the mass flow rate and decreased with an increase in the pipe submergence depth at higher mass flow rates. The FFT (Fast Fourier Transform) of interfacial area of the larger bubble at the pipe outlet shows that the first peak frequency lies between 0.5-5 Hz, and the second peak frequency lies in the range of 25-30 Hz.","PeriodicalId":275628,"journal":{"name":"Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126295669","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

Effect of fin location on constrained melting heat transfer of phase change material in a spherical capsule: A numerical study 翅片位置对相变材料在球形胶囊内受限熔融换热影响的数值研究

Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India Pub Date : 2022-07-18 DOI: 10.1615/ihmtc-2021.2760

A.K. Sharma, R. Kothari, Jaykumar Joshi, V. Saxena, S. Sahu

{"title":"Effect of fin location on constrained melting heat transfer of phase change material in a spherical capsule: A numerical study","authors":"A.K. Sharma, R. Kothari, Jaykumar Joshi, V. Saxena, S. Sahu","doi":"10.1615/ihmtc-2021.2760","DOIUrl":"https://doi.org/10.1615/ihmtc-2021.2760","url":null,"abstract":"\u0000 The present work is focussed on numerical investigation of the constrained melting of phase change material (n-octadecane) in a circumferentially finned spherical capsule keeping the base and volume of the fins equal in all cases. Four different fin shapes, namely straight, trapezoidal converging, stepped, stepped inverse, located at the center of the spherical capsule are considered for the study A series of two-dimensional transient numerical simulations are carried out. Present numerical results are validated with the existing experimental results of Fan et al. [5]. Various thermal performance parameters is used for comparative analysis. Baseline comparison of fin and no fin case have also been discussed. The least melting time of PCM is 114 min for the stepped fin, while the maximum melting time is 120 min and is reported for the straight fin. The surface area to volume ratio (S/V) of fins has been calculated for every case. Irrespective of the lower S/V ratio, the melting time of inverse stepped fin is lower than straight fin because of the excellent melting performance of inverse stepped fin in weak convection region. From the results, it has been concluded that changing the shape of fin from the base case of straight fin does not change the melting time significantly for fin volume considered in the present study. This research could be used as a reference for LHTES unit fin design optimization in the industrial setting.","PeriodicalId":275628,"journal":{"name":"Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126016582","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: 8

3D Computational Fluid Dynamics Analysis to Estimate Temperature Distribution of Spent Fuel Bundle during Dry Transfer Operation 用三维计算流体动力学分析估算干转移过程中乏燃料束的温度分布

Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India Pub Date : 1900-01-01 DOI: 10.1615/ihmtc-2021.2000

Megha Rajguru, P. Rahatgaonkar, J. Singh, D. Datta, H. Rammohan

引用次数: 0

Numerical simulations and analysis of flow past vertical-axis wind turbines employing the actuator line method 采用致动器线法对垂直轴风力机气流进行数值模拟与分析

Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India Pub Date : 1900-01-01 DOI: 10.1615/ihmtc-2021.4110

S. V, Rutvik S. Solanki, V. K. Chalamalla, S. Sinha

引用次数: 2

Analysis of Hypersonic Rarefied Reactive Flow Over RAM-C II Forebody Using hy2Foam Solver 基于hy2Foam求解器的高超声速RAM-C - II前体稀薄反应流分析

Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India Pub Date : 1900-01-01 DOI: 10.1615/ihmtc-2021.3350

Gaurav Sharma, A. A. M.

引用次数: 0

Towards understanding air curtain flows using RANS based numerical simulations 利用基于RANS的数值模拟来理解气幕流动

Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India Pub Date : 1900-01-01 DOI: 10.1615/ihmtc-2021.4120

Tanmay Agrawal, N. K. Jha, V. K. Chalamalla

引用次数: 2

Vapor Condensation of Iso-Butane over Plain Tube and 24 fpi finned tube placed horizontally 异丁烷在水平放置的平管和24fpi翅片管上的蒸汽冷凝

Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India Pub Date : 1900-01-01 DOI: 10.1615/ihmtc-2021.3850

S. K. Sajjan, A. Dewangan

引用次数: 0

Experimental Evaluation and Characterisation of PID Controller For Spacecraft Thermal Testing 航天器热测试PID控制器的实验评价与特性研究

Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India Pub Date : 1900-01-01 DOI: 10.1615/ihmtc-2021.4140

Subramanya, Goutam Tanneru

引用次数: 0

Study of a Waste Heat Recovery Cycle Using Super-Critical Carbon Dioxide as Working Fluid 超临界二氧化碳作为工质的余热回收循环研究

Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India Pub Date : 1900-01-01 DOI: 10.1615/ihmtc-2021.540

Lakshminarayanan Seshadri, Pramod Kumar

引用次数: 0

Modelling Fast Hydrogen Deflagration in Partially Obstructed Acceleration Tube of ENACCEF and the Model Constant of Eddy Dissipation Model ENACCEF部分阻塞加速管内快速氢爆燃的建模及涡流耗散模型的模型常数

Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India Pub Date : 1900-01-01 DOI: 10.1615/ihmtc-2021.3540

Nandan Saha, Shubham Mishra, V. Verma, J. Chattopadhyay

引用次数: 0