{"id":"https://openalex.org/W7119476394","doi":"https://doi.org/10.1016/j.nexus.2026.100635","title":"Obtaining the efficiency limits of axial hydrokinetic turbines","display_name":"Obtaining the efficiency limits of axial hydrokinetic turbines","publication_year":2026,"publication_date":"2026-01-08","ids":{"openalex":"https://openalex.org/W7119476394","doi":"https://doi.org/10.1016/j.nexus.2026.100635"},"language":"en","primary_location":{"id":"doi:10.1016/j.nexus.2026.100635","doi":"https://doi.org/10.1016/j.nexus.2026.100635","is_oa":true,"landing_page_url":"https://doi.org/10.1016/j.nexus.2026.100635","pdf_url":null,"source":{"id":"https://openalex.org/S4210238917","display_name":"Energy Nexus","issn_l":"2772-4271","issn":["2772-4271"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","jufo-1","norway-1"],"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":"cc-by-nc-nd","license_id":"https://openalex.org/licenses/cc-by-nc-nd","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Energy Nexus","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://doi.org/10.1016/j.nexus.2026.100635","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5061872685","display_name":"V\u00edctor Fern\u00e1ndez Pacheco","orcid":"https://orcid.org/0000-0001-6069-0443","observed_orcids":["https://orcid.org/0000-0001-6069-0443"]},"institutions":[{"id":"https://openalex.org/I9617848","display_name":"Universitat Polit\u00e8cnica de Catalunya","ror":"https://ror.org/03mb6wj31","country_code":"ES","type":"education","lineage":["https://openalex.org/I9617848"]}],"countries":["ES"],"is_corresponding":true,"raw_author_name":"V\u00edctor Manuel Fern\u00e1ndez Pacheco","raw_affiliation_strings":["Universitat Polit\u00e8cnica de Catalunya Barcelona, Barcelona, Spain"],"raw_orcid":"https://orcid.org/0000-0001-6069-0443","affiliations":[{"raw_affiliation_string":"Universitat Polit\u00e8cnica de Catalunya Barcelona, Barcelona, Spain","institution_ids":["https://openalex.org/I9617848"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5040986584","display_name":"Ahmed Gharib-Yosry","orcid":"https://orcid.org/0000-0002-7036-792X","observed_orcids":["https://orcid.org/0000-0002-7036-792X"]},"institutions":[{"id":"https://openalex.org/I9617848","display_name":"Universitat Polit\u00e8cnica de Catalunya","ror":"https://ror.org/03mb6wj31","country_code":"ES","type":"education","lineage":["https://openalex.org/I9617848"]}],"countries":["ES"],"is_corresponding":false,"raw_author_name":"Ahmed Gharib Yosry","raw_affiliation_strings":["Universitat Polit\u00e8cnica de Catalunya Barcelona, Barcelona, Spain"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Universitat Polit\u00e8cnica de Catalunya Barcelona, Barcelona, Spain","institution_ids":["https://openalex.org/I9617848"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5122341027","display_name":"Rodolfo Espina Vald\u00e9s","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I9617848","display_name":"Universitat Polit\u00e8cnica de Catalunya","ror":"https://ror.org/03mb6wj31","country_code":"ES","type":"education","lineage":["https://openalex.org/I9617848"]}],"countries":["ES"],"is_corresponding":false,"raw_author_name":"Rodolfo Espina Vald\u00e9s","raw_affiliation_strings":["Universitat Polit\u00e8cnica de Catalunya Barcelona, Barcelona, Spain"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Universitat Polit\u00e8cnica de Catalunya Barcelona, Barcelona, Spain","institution_ids":["https://openalex.org/I9617848"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5122332554","display_name":"Alexandre Presas Batll\u00f3","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I9617848","display_name":"Universitat Polit\u00e8cnica de Catalunya","ror":"https://ror.org/03mb6wj31","country_code":"ES","type":"education","lineage":["https://openalex.org/I9617848"]}],"countries":["ES"],"is_corresponding":false,"raw_author_name":"Alexandre Presas Batll\u00f3","raw_affiliation_strings":["Universitat Polit\u00e8cnica de Catalunya Barcelona, Barcelona, Spain"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Universitat Polit\u00e8cnica de Catalunya Barcelona, Barcelona, Spain","institution_ids":["https://openalex.org/I9617848"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5036810572","display_name":"Eduardo \u00c1lvarez-\u00c1lvarez","orcid":"https://orcid.org/0000-0003-4585-9911","observed_orcids":["https://orcid.org/0000-0003-4585-9911"]},"institutions":[{"id":"https://openalex.org/I9617848","display_name":"Universitat Polit\u00e8cnica de Catalunya","ror":"https://ror.org/03mb6wj31","country_code":"ES","type":"education","lineage":["https://openalex.org/I9617848"]}],"countries":["ES"],"is_corresponding":false,"raw_author_name":"Eduardo \u00c1lvarez \u00c1lvarez","raw_affiliation_strings":["Universitat Polit\u00e8cnica de Catalunya Barcelona, Barcelona, Spain"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Universitat Polit\u00e8cnica de Catalunya Barcelona, Barcelona, Spain","institution_ids":["https://openalex.org/I9617848"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5101756072","display_name":"Eduardo Blanco","orcid":"https://orcid.org/0000-0003-3290-201X","observed_orcids":["https://orcid.org/0000-0003-3290-201X"]},"institutions":[{"id":"https://openalex.org/I9617848","display_name":"Universitat Polit\u00e8cnica de Catalunya","ror":"https://ror.org/03mb6wj31","country_code":"ES","type":"education","lineage":["https://openalex.org/I9617848"]}],"countries":["ES"],"is_corresponding":false,"raw_author_name":"Eduardo Blanco Marigorta","raw_affiliation_strings":["Universitat Polit\u00e8cnica de Catalunya Barcelona, Barcelona, Spain"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Universitat Polit\u00e8cnica de Catalunya Barcelona, Barcelona, Spain","institution_ids":["https://openalex.org/I9617848"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5061872685"],"corresponding_institution_ids":["https://openalex.org/I9617848"],"apc_list":{"value":2200,"currency":"USD","value_usd":2200},"apc_paid":{"value":2200,"currency":"USD","value_usd":2200},"fwci":2.9333,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.8405328,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":93,"max":96},"biblio":{"volume":"21","issue":null,"first_page":"100635","last_page":"100635"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10680","display_name":"Wind Energy Research and Development","score":0.9086999893188477,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10680","display_name":"Wind Energy Research and Development","score":0.9086999893188477,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11202","display_name":"Cavitation Phenomena in Pumps","score":0.02800000086426735,"subfield":{"id":"https://openalex.org/subfields/2211","display_name":"Mechanics of Materials"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10944","display_name":"Turbomachinery Performance and Optimization","score":0.023099999874830246,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/efficiency-limits","display_name":"efficiency bounds","score":0.9049999713897705},{"id":"https://openalex.org/keywords/tip-speed-ratio","display_name":"tip speed ratio","score":0.9670000076293945},{"id":"https://openalex.org/keywords/actuator-disk-theory","display_name":"actuator disk theory","score":0.8100000023841858},{"id":"https://openalex.org/keywords/open-channel-flow","display_name":"open channel flow","score":0.8149999976158142},{"id":"https://openalex.org/keywords/power-coefficient","display_name":"power coefficient","score":0.7039999961853027},{"id":"https://openalex.org/keywords/off-grid-operation","display_name":"off-grid operation","score":0.42100000381469727},{"id":"https://openalex.org/keywords/dimensionless-parameters","display_name":"dimensionless parameters","score":0.5370000004768372},{"id":"https://openalex.org/keywords/turbine-design","display_name":"turbine design","score":0.33500000834465027}],"concepts":[{"id":"https://openalex.org/C2778449969","wikidata":"https://www.wikidata.org/wiki/Q130760","display_name":"Turbine","level":2,"score":0.7501999735832214},{"id":"https://openalex.org/C24872484","wikidata":"https://www.wikidata.org/wiki/Q126818","display_name":"Dimensionless quantity","level":2,"score":0.5891000032424927},{"id":"https://openalex.org/C151201525","wikidata":"https://www.wikidata.org/wiki/Q177239","display_name":"Limit (mathematics)","level":2,"score":0.585099995136261},{"id":"https://openalex.org/C47446073","wikidata":"https://www.wikidata.org/wiki/Q5165890","display_name":"Control theory (sociology)","level":3,"score":0.5763999819755554},{"id":"https://openalex.org/C204323151","wikidata":"https://www.wikidata.org/wiki/Q905424","display_name":"Range (aeronautics)","level":2,"score":0.5674999952316284},{"id":"https://openalex.org/C163258240","wikidata":"https://www.wikidata.org/wiki/Q25342","display_name":"Power (physics)","level":2,"score":0.5145999789237976},{"id":"https://openalex.org/C38349280","wikidata":"https://www.wikidata.org/wiki/Q1434290","display_name":"Flow (mathematics)","level":2,"score":0.4474000036716461},{"id":"https://openalex.org/C17281054","wikidata":"https://www.wikidata.org/wiki/Q193466","display_name":"Rotor (electric)","level":2,"score":0.4366999864578247},{"id":"https://openalex.org/C57879066","wikidata":"https://www.wikidata.org/wiki/Q41217","display_name":"Mechanics","level":1,"score":0.43230000138282776},{"id":"https://openalex.org/C116615679","wikidata":"https://www.wikidata.org/wiki/Q6795908","display_name":"Maximum power principle","level":3,"score":0.4072999954223633},{"id":"https://openalex.org/C14036430","wikidata":"https://www.wikidata.org/wiki/Q3736076","display_name":"Function (biology)","level":2,"score":0.40540000796318054},{"id":"https://openalex.org/C172707124","wikidata":"https://www.wikidata.org/wiki/Q423488","display_name":"Actuator","level":2,"score":0.3734000027179718},{"id":"https://openalex.org/C62884695","wikidata":"https://www.wikidata.org/wiki/Q184871","display_name":"Euler's formula","level":2,"score":0.3625999987125397},{"id":"https://openalex.org/C199104240","wikidata":"https://www.wikidata.org/wiki/Q118291","display_name":"Marine engineering","level":1,"score":0.3407999873161316},{"id":"https://openalex.org/C9652623","wikidata":"https://www.wikidata.org/wiki/Q190109","display_name":"Field (mathematics)","level":2,"score":0.33640000224113464},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3172000050544739},{"id":"https://openalex.org/C423512","wikidata":"https://www.wikidata.org/wiki/Q383973","display_name":"Electricity generation","level":3,"score":0.3127000033855438},{"id":"https://openalex.org/C131043120","wikidata":"https://www.wikidata.org/wiki/Q1543991","display_name":"Potential flow","level":2,"score":0.30809998512268066},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.30709999799728394},{"id":"https://openalex.org/C2780778756","wikidata":"https://www.wikidata.org/wiki/Q644997","display_name":"Water turbine","level":2,"score":0.28189998865127563},{"id":"https://openalex.org/C8171440","wikidata":"https://www.wikidata.org/wiki/Q903414","display_name":"Steady state (chemistry)","level":2,"score":0.27649998664855957},{"id":"https://openalex.org/C1633027","wikidata":"https://www.wikidata.org/wiki/Q815820","display_name":"Computational fluid dynamics","level":2,"score":0.2712000012397766},{"id":"https://openalex.org/C200398353","wikidata":"https://www.wikidata.org/wiki/Q63973","display_name":"Turbomachinery","level":2,"score":0.27059999108314514},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.2703000009059906},{"id":"https://openalex.org/C2779285531","wikidata":"https://www.wikidata.org/wiki/Q17122921","display_name":"Tip clearance","level":3,"score":0.26440000534057617},{"id":"https://openalex.org/C180788929","wikidata":"https://www.wikidata.org/wiki/Q742777","display_name":"Axial compressor","level":3,"score":0.2621999979019165},{"id":"https://openalex.org/C180925781","wikidata":"https://www.wikidata.org/wiki/Q514096","display_name":"Open-channel flow","level":3,"score":0.2551000118255615}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1016/j.nexus.2026.100635","doi":"https://doi.org/10.1016/j.nexus.2026.100635","is_oa":true,"landing_page_url":"https://doi.org/10.1016/j.nexus.2026.100635","pdf_url":null,"source":{"id":"https://openalex.org/S4210238917","display_name":"Energy Nexus","issn_l":"2772-4271","issn":["2772-4271"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","jufo-1","norway-1"],"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":"cc-by-nc-nd","license_id":"https://openalex.org/licenses/cc-by-nc-nd","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Energy Nexus","raw_type":"journal-article"},{"id":"pmh:oai:doaj.org/article:3c65cec4d3f24b7082be42ca6a17c21d","doi":null,"is_oa":true,"landing_page_url":"https://doaj.org/article/3c65cec4d3f24b7082be42ca6a17c21d","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-sa","license_id":"https://openalex.org/licenses/cc-by-sa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Energy Nexus, Vol 21, Iss , Pp 100635- (2026)","raw_type":"article"},{"id":"pmh:oai:upcommons.upc.edu:2117/455781","doi":null,"is_oa":true,"landing_page_url":"https://hdl.handle.net/2117/455781","pdf_url":null,"source":{"id":"https://openalex.org/S4377196262","display_name":"UPCommons institutional repository (Universitat Polit\u00e8cnica de Catalunya)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I9617848","host_organization_name":"Universitat Polit\u00e8cnica de Catalunya","host_organization_lineage":["https://openalex.org/I9617848"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-nc-nd","license_id":"https://openalex.org/licenses/cc-by-nc-nd","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Article"}],"best_oa_location":{"id":"doi:10.1016/j.nexus.2026.100635","doi":"https://doi.org/10.1016/j.nexus.2026.100635","is_oa":true,"landing_page_url":"https://doi.org/10.1016/j.nexus.2026.100635","pdf_url":null,"source":{"id":"https://openalex.org/S4210238917","display_name":"Energy Nexus","issn_l":"2772-4271","issn":["2772-4271"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["cwts-core","doaj","jufo-1","norway-1"],"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":"cc-by-nc-nd","license_id":"https://openalex.org/licenses/cc-by-nc-nd","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Energy Nexus","raw_type":"journal-article"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/7","display_name":"Affordable and clean energy","score":0.9853000044822693}],"sustainable_development_goals_aurora":[{"id":"https://metadata.un.org/sdg/7","display_name":"Affordable and clean energy","score":0.9003391265869141}],"study_designs":[],"awards":[{"id":"https://openalex.org/G3953231386","display_name":null,"funder_award_id":"GRU-GIC-24-102","funder_id":"https://openalex.org/F4320337753","funder_display_name":"Interreg"},{"id":"https://openalex.org/G5532877682","display_name":null,"funder_award_id":"ATLANTIC AREA 2021-2027 \\u2013 EAPA_0001/2022","funder_id":"https://openalex.org/F4320337753","funder_display_name":"Interreg"}],"funders":[{"id":"https://openalex.org/F4320321505","display_name":"Generalitat de Catalunya","ror":"https://ror.org/01bg62x04"},{"id":"https://openalex.org/F4320337753","display_name":"Interreg","ror":null}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":18,"referenced_works":["https://openalex.org/W1974097079","https://openalex.org/W2007028828","https://openalex.org/W2069903391","https://openalex.org/W2084731855","https://openalex.org/W2513600890","https://openalex.org/W2733674444","https://openalex.org/W2754240557","https://openalex.org/W3002444569","https://openalex.org/W3022998860","https://openalex.org/W3100274814","https://openalex.org/W3159269172","https://openalex.org/W4221047797","https://openalex.org/W4291340395","https://openalex.org/W4308946277","https://openalex.org/W4311435773","https://openalex.org/W4380248600","https://openalex.org/W4381686530","https://openalex.org/W4390122540"],"related_works":[],"abstract_inverted_index":{"\u2022":[0,21,45],"A":[1],"new":[2],"analytical":[3],"function":[4,25,155],"that":[5,103],"defines":[6],"the":[7,16,28,33,36,64,78,86,101,108,125,127,133,137,142,147,151,160,166,182,192,217,222,232,240,243,247,252],"efficiency":[8,23,92,143,162,245],"limits":[9,24,144,163],"of":[10,80,93,235,239],"an":[11,73,174,187],"axial":[12,171],"hydrokinetic":[13,70],"turbine":[14,71,266],"in":[15,72,77,119,173],"open":[17,74,175,188],"field":[18,75],"is":[19,95],"presented.":[20],"The":[22,91,197],"depends":[26],"on":[27,165],"tip":[29,167,236],"speed":[30,168,237],"ratio":[31],"and":[32,40,60,110,136,206,246,257,267],"angle":[34],"between":[35,132,242],"relative":[37],"water":[38],"velocity":[39],"a":[41,69,154,228,263,272],"profile":[42],"linear":[43],"velocity.":[44],"This":[46],"finding":[47],"has":[48,156],"great":[49],"value":[50],"for":[51,170,195,254,262],"evaluating":[52],"diverse":[53],"equipment":[54],"designs":[55],"at":[56,63,114,130],"different":[57,145,269],"operating":[58,113],"points":[59,131],"not":[61],"only":[62],"maximum":[65,87,116,138],"power":[66,88,139,161],"point.":[67],"For":[68],"setting,":[76],"absence":[79],"flow":[81,200],"restrictions,":[82],"Betz\u2019s":[83,148],"limit":[84,223],"represents":[85],"coefficient":[89,219],"possible.":[90],"turbines":[94,128,172,270],"evaluated":[96],"against":[97],"this":[98],"value,":[99],"under":[100],"assumption":[102],"they":[104],"are":[105],"connected":[106],"to":[107,124],"grid,":[109],"therefore":[111],"continuously":[112],"their":[115],"power.":[117],"However,":[118],"island":[120],"model":[121],"operation":[122],"(disconnected":[123],"mains)":[126],"operate":[129],"no":[134],"load":[135],"coefficient,":[140],"being":[141],"from":[146,271],"limit.":[149],"In":[150],"present":[152],"study,":[153],"been":[157,214,260],"found":[158],"defining":[159],"depending":[164],"ratio,":[169],"channel":[176],"without":[177],"blockage.":[178],"Mathematical":[179],"deduction":[180],"uses":[181],"actuator":[183],"disk":[184],"theory":[185],"within":[186],"channel,":[189],"complemented":[190],"by":[191],"Euler":[193],"equation":[194],"turbomachinery.":[196],"approach":[198],"assumes":[199],"simplifications,":[201],"including":[202],"steady,":[203],"one-dimensional,":[204],"incompressible,":[205],"turbulent-free":[207],"conditions.":[208],"Furthermore,":[209],"two":[210],"dimensionless":[211],"parameters":[212,226,258],"have":[213,259],"proposed":[215],"relating":[216],"real":[218],"curve":[220],"with":[221],"one.":[224],"These":[225],"enable":[227],"better":[229],"definition":[230],"-in":[231],"whole":[233],"range":[234],"ratios-":[238],"difference":[241],"actual":[244],"limits,":[248],"as":[249,251],"well":[250],"potential":[253],"improvement.":[255],"Function":[256],"calculated":[261],"numerically":[264],"simulated":[265],"three":[268],"literature":[273],"benchmark.":[274]},"counts_by_year":[{"year":2026,"cited_by_count":1}],"updated_date":"2026-10-01T08:54:57.152042","created_date":"2026-01-09T00:00:00"}