{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T13:30:51Z","timestamp":1777642251671,"version":"3.51.4"},"reference-count":13,"publisher":"Cambridge University Press (CUP)","license":[{"start":{"date-parts":[[2006,4,20]],"date-time":"2006-04-20T00:00:00Z","timestamp":1145491200000},"content-version":"unspecified","delay-in-days":7779,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Fluid Mech."],"published-print":{"date-parts":[[1985,1]]},"abstract":"<jats:p>A two-dimensional analysis, based on linear surface-wave theory, is developed for an oscillating-water-column wave-energy device in water of arbitrary constant depth. The immersed part of the structure is assumed of shallow draught except for a submerged vertical reflecting wall. Both the cases of linear and nonlinear power take-off are considered. The results show that air compressibility can be important in practice, and its effects may in general be satisfactorily represented by linearization. The analysis indicates that using a turbine whose characteristic exhibits a phase difference between pressure and flow rate may be a method of strongly reducing the chamber length and turbine size with little change in the capability of energy extraction from regular waves. It was found in two examples of devices with strongly nonlinear power take-off that the maximum efficiency is only marginally inferior to what can be achieved in the linear case.<\/jats:p>","DOI":"10.1017\/s0022112085000234","type":"journal-article","created":{"date-parts":[[2006,4,20]],"date-time":"2006-04-20T11:35:32Z","timestamp":1145532932000},"page":"467-485","source":"Crossref","is-referenced-by-count":318,"title":["Wave generation by an oscillating surface-pressure and its application in wave-energy extraction"],"prefix":"10.1017","volume":"150","author":[{"given":"A. J. N. A.","family":"Sarmento","sequence":"first","affiliation":[]},{"given":"A. F. de O.","family":"Falc\u00e3o","sequence":"additional","affiliation":[]}],"member":"56","published-online":{"date-parts":[[2006,4,20]]},"reference":[{"key":"S0022112085000234_ref009","unstructured":"Mccamy R. C. 1961 On the heaving motion of cylinders of shallow draft.J. Ship Res. 5,34\u201343."},{"key":"S0022112085000234_ref003","unstructured":"Evans D. V. 1978 The oscillating water column wave-energy device.J. Inst. Maths Applics 22,423\u2013433."},{"key":"S0022112085000234_ref008","unstructured":"Lamb H. 1905 On deep water waves Proc. Lond. Math. Soc. (2) 2,371\u2013400."},{"key":"S0022112085000234_ref010","unstructured":"Moody G. W. 1979 The NEL oscillating water column: recent developments. Proc. 1st Symp. Wave Energy Utilization, Gothenburg ."},{"key":"S0022112085000234_ref004","unstructured":"Evans D. V. 1982 Wave-power absorption by systems of oscillating surface pressure distributions.J. Fluid Mech. 114,481\u2013499."},{"key":"S0022112085000234_ref006","unstructured":"Gato, L. M. C. & Falc\u00e3o A. F. de O. 1983 Aerodynamics of self-rectifying turbines for wave-energy extraction (in Portuguese). In Proc. 3rd Portuguese Congr. Theoretical and Applied Mechanics, Lisbon ."},{"key":"S0022112085000234_ref007","unstructured":"Gato, L. M. C. & Falc\u00e3o A. F. de O. 1984 On the theory of the Wells turbine. ASME Paper 84-GT-5;Trans. ASME J: Engng Gas Turbines & Power 106,628\u2013633."},{"key":"S0022112085000234_ref005","unstructured":"Fernandes A. C. 1983 Analysis of an axisymmetric pneumatic buoy by reciprocity relations and a ring-source method. Ph.D. thesis, Massachusetts Institute of Technology."},{"key":"S0022112085000234_ref012","unstructured":"Stoker J. J. 1957 Water Waves .Interscience."},{"key":"S0022112085000234_ref013","doi-asserted-by":"crossref","unstructured":"Wehausen, J. V. & Laitone E. V. 1960 Surface waves. In Handbuch der Physik . vol. 9,pp.446\u2013778.Springer.","DOI":"10.1007\/978-3-642-45944-3_6"},{"key":"S0022112085000234_ref001","unstructured":"Brown K. M. 1973 Computer oriented algorithms for solving systems of simultaneous nonlinear algebraic equations. In Numerical Solution of Systems of Nonlinear Algebraic Equations (ed. G. D. Byrne & C. A. Hall ).Academic."},{"key":"S0022112085000234_ref011","unstructured":"Ogilvie T. F. 1969 Oscillating pressure fields on a free surface.Univ. Michigan, Coll. Engng Rep. 030."},{"key":"S0022112085000234_ref002","unstructured":"Count B. M. , Fry R. , Haskell, J. & Jackson N. 1981 The M.E.L. oscillating water column.CEGB Rep. RD\/M\/1157N81."}],"container-title":["Journal of Fluid Mechanics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0022112085000234","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,6,7]],"date-time":"2019-06-07T19:59:31Z","timestamp":1559937571000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0022112085000234\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1985,1]]},"references-count":13,"alternative-id":["S0022112085000234"],"URL":"https:\/\/doi.org\/10.1017\/s0022112085000234","relation":{},"ISSN":["0022-1120","1469-7645"],"issn-type":[{"value":"0022-1120","type":"print"},{"value":"1469-7645","type":"electronic"}],"subject":[],"published":{"date-parts":[[1985,1]]}}}