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| 1 | Design and development of guide vane cascade for a low speed number Francis turbine显示文摘Guide vane cascade of a low speed number Francis turbine is developed for the experimental investigations.The test setup is able to produce similar velocity distributions at the runner inlet as that of a reference prototype turbine.Standard analytical methods are used to design the reference turbine.Periodic walls of flow channel between guide vanes are identified as the starting profile for the boundary of the cascade.Two alternative designs with three guide vanes and two guide vanes,without runner,are studied.A new approach,for the hydraulic design and optimization of the cascade test setup layout,is proposed and investigated in details.CFD based optimization methods are used to define the final layout of the test setup.The optimum design is developed as a test setup and experimental validation is done with PIV methods.The optimized design of cascade with one guide vane between two flow channels is found to produce similar flow conditions to that in the runner inlet of a low speed number Francis turbine. | Biraj Singh THAPA Chirag TRIVEDI Ole Gunnar DAHLHAUG | 2016 | Journal of Hydrodynamics2016，28，4： | 2 |
| 2 | Phytochemical profile and pharmacological activity of Aegle marmelos Linn显示文摘Aegle marmelos Linn.(Rutaceae), commonly known as ‘‘bael' in Nepal and India, is a valuable medicinal plant and is considered sacred by the Hindus. It is used to cure several diseases in the Indian traditional medicine system of Ayurveda and has had similar uses among many ethnic communities residing in Indian subcontinent for over 5000 years. Its leaves, bark, stem, fruits and seeds have been used for various medicinal purposes. Bael fruits are especially effective in the treatment of chronic diarrhea, dysentery and peptic ulcers, while they are also useful as a laxative and cure for respiratory infections. Scientific studies have validated many of the ethnomedicinal uses of A. marmelos, which include antibacterial,antiviral, antidiarrheal, gastroprotective, anti-ulcerative colitis, hepatoprotective, antidiabetic, cardioprotective and radioprotective effects. Recently, this plant has also received attention as an anticancer agent for the treatment of various types of cancers. Thus, this review focuses on scientific evidence verifying the important pharmacological activity such as antioxidant, antidiabetic, antimicrobial, hepatoprotective,cardioprotective and anticancer activity of A. marmelos. | Bikash Manandhar Keshav Raj Paudel Biraj Sharma Rajendra Karki | 2018 | Journal of Integrative Medicine2018，16，3： | 1 |
| 3 | Recycling of isabgol(Plantago ovata Forsk.)straw biomass and mineral powder with bio-inoculants as an effective soil amendment for isabgol cultivation显示文摘Efficient utilization of isabgol(Plantgo ovata Forsk.)straw biomass through preparation of bio-active organic fertilizer in a natural composting process has not been studied.In this study,phosphate rock and silicate mineral(mica)powder were used as natural sources of phosphorus(P)and potassium(K),respectively.Cow dung slurry as a natural decomposer was mixed with the straw biomass at a 10:1(weight/weight)ratio along with mineral powder.Then,nutrient-mobilizing bio-inoculants were used in the composting process after attaining thermal stabilization.The agronomic effectiveness of the resulting bio-active compost(BAC)as a bio-organic fertilizer was compared with that of conventional organics(farmyard manure and vermicompost)and chemical fertilizer(CF)by growing isabgol under field conditions.Composting with the natural sources of P and K along with the bio-inoculants increased the total nitrogen(13.6 g kg^(-1)),P(38.7 g kg^(-1)),and K(31.2 g kg^(-1))contents in the final product(i.e.,BAC)compared with composting without the mineral powder and bio-inoculants.Application of BAC remarkably improved the seed yield(2.5%)and husk quality of isabgol in comparison with conventional organics and CF.Compared with CF,BAC significantly boosted the economic yield of isabgol by improving the husk recovery(2.5%)and mucilage yield(4.12%).Furthermore,BAC significantly improved the soil quality by increasing organic carbon(C),available nutrients,and microbial biomass C contents,as well as enzyme activity.The positive correlation between soil and plant parameters also highlighted the benefits of BAC for isabgol production through soil quality improvement.Therefore,it can be considered as a zero-waste technology,whereby a large quantity of straw biomass generated from isabgol cultivation,which contains essential nutrients,can be recycled back to the soil.Furthermore,BAC can be effectively used as a bio-active organic fertilizer,particularly in systems where chemical inputs are restricted,such as organic agriculture. | Biraj Bandhu BASAK Ajoy SAHA | 2022 | Pedosphere2022，32，5： | 1 |
| 4 | Fully coupled FSI analysis of Francis turbines exposed to sediment erosion显示文摘 | Chitrakar S Cervantes M Biraj S T | 2014 | International Journal of Fluid Machinery and Systems2014，7，3： | 1 |
| 5 | Efficient composite bipolar plate reinforced with carbon fiber and graphene for proton exchange membrane fuel cell显示文摘 | Biraj Kumar Kakati Avijit Ghosh Anil Verma | 2013 | International Journal of Hydrogen Energy2013，，22： | 1 |
| 6 | Effect of Resin matrix precursor on the properties of graphite composite bipolar plate for PEM fuel cell显示文摘 | Biraj Kumar Kakati Dhanapati Deka | 2007 | Energy & Fuels2007，21，： | 1 |
| 7 | Transformation and risk assessment of the East Kolkata Wetlands (India)using fuzzy MCDM method and geospatial technology显示文摘The East Kolkata Wetlands (EKW) is located on the eastern periphery of the city of Kolkata and extends up to theBidyadhari-Matla River confluence. It is a Ramsar Site and acts as an absorber basin for a large number of con-taminants drained from Kolkata. Agricultural lands, sewage-fed fisheries, garbage dumping fields, horticulture,and built-up areas are included in this protected area, that covers approximately 125 km2. It reveals that climatechange reduces the variety of wetland ecosystem services and increases socio-economic vulnerability and eco-nomic stress. The human encroachment, reclamation of land for agriculture, aquaculture, and urban expansion inand around Kolkata has recently adversely threatened the EKW. The remotely sensed data, socio-economic data,and responses of inhabitants have been used to analyse the EKW’s risk and vulnerability. We employed geospatialanalysis by using the Multi-Criteria Decision Making (MCDM) method using nine risk factors. An in-depth analysisof the EKW using geospatial techniques and the Fuzzy Analytic Hierarchy Process (FAHP) helped to understandthe EKW transformations through vulnerability and risk analysis. The results show that the transformation of thewetland to aquaculture, eutrophication and pollution, road proximity, waste dumping, population density, andgrowth are the main factors for the deteriorating health, quality, and environment of the EKW. It also reveals thatquantitative and qualitative evaluations of ecosystem services, wetland degradation, transformation, and cause-effect rapport should be periodically assessed using scientific methods like FAHP, RS, GIS to formulate resilient,integrated plans and strategy for the sustainable management of the EKW. | Biraj Kanti Mondal Suchitra Kumari Arijit Ghosh Prabuddh Kumar Mishra | 2022 | Geography and Sustainability2022，3，3： | 0 |
| 8 | Wind energy as a source of green hydrogen production in the USA显示文摘The study incorporates an overview of the green hydrogen-production potential from wind energy in the USA,its application in power generation and the scope of substituting grey and blue hydrogen for industrial usage.Over 10 million metric tons of grey and blue hydrogen is produced in the USA annually to fulfil the industrial demand,whereas,for 1 million metric tons of hydrogen generated,13 million metric tons of CO_(2) are released into the atmosphere.The research aims to provide a state-of-the-art review of the green hydrogen technology value chain and a case study on the production of green hydrogen from an 8-MW wind turbine installed in the southern plain region of Texas.This research estimates that the wind-farm capacity of 130 gigawatt-hours is required to substitute grey and blue hydrogen for fulfilling the current US annual industrial hydrogen demand of 10 million metric tons.The study investi-gates hydrogen-storage methods and the scope of green hydrogen-based storage facilities for energy produced from a wind turbine.This research focuses on the USA’s potential to meet all its industrial and other hydrogen application requirements through green hydrogen. | Ashish Sedai Rabin Dhakal Shishir Gautam Bijaya Kumar Sedhain Biraj Singh Thapa Hanna Moussa Suhas Pol | 2023 | Clean Energy2023，7，1： | 0 |
| 9 | 混流式水轮机泥沙磨蚀经验模型显示文摘通过水轮机部件的泥沙颗粒会磨蚀水轮机的过流表面。基础材质的逐渐磨损不仅改变了水轮机转轮的外形,也削弱了其结构特性。一个主要的影响是使水轮机效率逐渐降低。在探索经验关系式估计水轮机泥沙磨蚀的影响方面,研究人员已经开展了相关工作。本文针对混流式水轮机定义了一种恰当的磨蚀模型。为了估计转轮磨损率和水轮机连续效率下降,选择了两个标准的磨蚀模型。为估算混流式水轮机转轮的泥沙磨损量提出了改进的经验关系式,并将该改进关系式的计算结果与现场试验测量结果进行了对比。研究发现通过分析现场的泥沙数据能够预测由于磨蚀引起的混流式转轮破坏。改进的磨蚀模型的计算结果与先前的研究结果以及试验测量结果一致。所提出简单磨蚀模型有助于在特定现场条件下恰当地规划混流式水轮机转轮的设计、运行和维护策略。 | Biraj Singh Thapa | 2012 | 国外大电机2012，，3： | 0 |
| 10 | 水轮机内部泥沙处理的研究现状显示文摘加德满都大学(Ku)是尼?自尔领先的教育机构.在小型水轮机方面拥有十多年的研发经验。加德满都大学与挪威科技大学(NTNU)开展技术合作,进行了一些与水轮机泥沙磨损相关的研究。目前加德满都大学已经开发了一个用于混流式水轮机转轮初步设计和优化设计的新程序。这个程序也可以对比不同设计案例转轮叶片的磨损情况。最终设计可以导出到计算流体动力学(CFD)和流同耦合(FSI)中做进一步分析。通过该程序可以进行参数调查来评估每个设计参数对泥沙磨损的影响。通过CFD二具对几种优化设计进行开发和分析,从而实现最小磨损和最大效率所需要的条件。本文总结了南亚地区水轮机泥沙磨损的问题,同时介绍了加德满都大学水轮机研发和泥沙磨损研究的一些重要成果,并对有效降低混流式水轮机泥沙磨损的优化设计进行了详细的讨论。 | Biraj Singh Thapa 张广 | 2016 | 国外大电机2016，0，2： | 0 |
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