*********** +++++++++++++++++++++ 122494B.PHY + Source: ONR Asia + *********** +++++++++++++++++++++ Contributory Categories: Country: Japan From: Techno-Ocean '94 Proceedings Volumes International Symposium 26-29 October 1994 Kobe, Japan KEYWORDS: With each item +++++ Part V/V 3 Items Item 1 V. II, p. 697-703 Text in English VORTEX - WAVE RESONANCE AND THE POSSIBILITY OF OCEAN WATER MOTION STRUCTURE Mickael A. BASIN. Fonna LTD. St-Petersburg Russia KEY WORDS: Wave, vortex, hydrofoil, Froude nmuber., resonance, water, density, ocean ABSTRACT. In the paper is described the vortex -wave resonance . This phenomena occurs when lifting bodies move in nonhomogeneous medium, and the length of the dispersive waves induced by the stationary motion of the body is comparable with the bodies length. It is supposed to use opened phenomena to the ocean water motion control. REFERENCES. 1. Sretensky L.N. Theory of Wave Motions in the Liquid - M.- L."ONTI-NKTP," USSR,1936,304 pp. (in Russian). 2. The Works of Theory of Wave Resistance conference M."ZAGI" 1937 (in Russian) 3. J.J. Stoker . Water Waves. The Mathematical Theory with Applications. London,New York .Interscience Fublishers 4. J. Lighthill. Waves in Fluids London - New York - Melboume, Cambridge University Press, 1978. 5. Sreteiisky L.N. Theory of wave Motions iii the Liquid . M." NAUKA" 1977,811 pp. (in Russian). 6. Phillips O.M. On the Dynamics of Unsteady Gravity Waves of Finite Amplitude . Part I -J. Fluid Mechanics 1960 v.9 pp l93- 217. 7 Longuet-Higgins M.S. The Instabilities of Gravity Waves of Finite Amplitude . Part 1, Superharmonics.- Proc. Roy. Soc. 1978, v. A360,pp.471-488. 8. Benney D. Nonlinear Gravity Wave Interactions. J. Fluid Mech. 1962,v.14, pp.577-584. 9. Zacharov V.E. Shabat A.B. Exact Theory of Two-Dimensional "Setffocusiration"??? and One dimensional Automodulation of Waves in Nonlinear Media . "GETF", 1971 , B.61 pp. 1 18-134 (In Russian). 10. Brechovskich. L.M., Gontcharov V.V. , Kurtepov V.M., Naugoinych K.A. About Resonance Stimulating of Inner Waves by the Nonlinear Stimulating of Surface Waves ."Izv.AN SSSR", Physics of Ocean Atiliosphere " 1972, Band 8,pp. 192-203. 11. O.Phillips . Wave Interaction- Idea Evolution: Journal of Fluid Mechanics . A Special Issue Celebrating the 25-th Aniversary of the Journal and Containing Editorial Reflections on the Development of Fluid Mechanics . Volume +++++++++++++++ Edited to here +++++++++++++++ 106 , h4ay 1981, Cambidge University Press,Cm-nbtidge. Loiidoii - Ncw York - New Rochelle - Melbounie SYdiiey. 12-Laillb H. On Deep Water Waves . Proc. London h4atheiiiatical Soc. 1904v.2,pp.371-399. 13-Rayleigh. On Periodic Irrotational Waves at the Surface of Deep Water Piiilos Mag.6, 1917, v.33, PP-381-399. 14-Russell J.Scott.Report on waves Br. Assoc.Adv. Sci- Rep. 1844,14-th Mtg, pp.311-390, pp. 15-Stokes G.G. On the Theory of Oscillatory Waves .-Trails. Calllbtidgc Phylos. Soc. 1849, v.8,pp.441445,Matli Phys.Pap. Vol.l,ppl97-229. 17. Havelok T.H. The Resistance of a Ship among Waves- PRSL,ser.A,1937,vol.161,N 906 . 18. Voitkunsky Ja.J. Water Resistance to the SWp Motion,L.:"Sudostrojenie",1964,(in Russian) 19. Kostukov A.A.Ship Waves and Wave Resistance Theory. L.Sudostroyenie 1964, (in Russian) 20. Kochin N.E. About Wave Resistance and Lift for the Bodies Submerged in the Water, 1937. Works of the Conference for the Theory of Wave Resistance .M.:"ZAGI",pp.1-30.(in Russian). 21. Keldysh M.V. , Lavrentjev M.A ..About the Motion of the Foil under the Heavy Liquid SurfaceThe Works of the Conference for the Wave Resistance neory.1937,pp.31-62 (in Russian). 22.Sedov L.I. Theory of Nonstationary Ghding and Motion of the Hydrofoil with Running down Vortices.-Works of "ZAGI",NN 252,1936 (in Russian). 23.Vladiiriirov A.N. Lift on the Hydrofoil near the Free Surface.- L.:"Sudostrojeiiie" N 6,1937 (in Russian). 24.Chudinov S.D.About the Lift on the Hydrofoil with Finite Span. Works of "VNITOSS",1965, B6,N2, pp74-92 (in Russian)) 25.BlutWn V.J., Ivanov L.A.,Maseev M.B. Tranport Vessels onn the Hydrofoils .-M.-Transport 1964,(in Russian). 26.Egorov I.T.,Sokolov V.T.,Hydrodyiiai@cs of Fast Ships L.:"Sudostrojenie"1971.424pp.(in Russian). 27.Epstein !,.A. Methods of Diinentions and Similarity Theory in the Probleins of Ships Hydrodynamics L.:"Sudostrojenie 1971",(in Russian). 28.Fedorov E.A. Plane Problem about themotion of the Body with Arbitrary Form neaf the Free Surface of Ideal Nonheavy Liquid. Works of "NTO SP"1968 ,N 104, pp.126-133.(in Russian). 29.Logvinovich G.V.Hydrodyn@cs of Flows With Free Boundaties.Kiev,"Naukova Dui@a",1969.(in Russian). 30.Basiii M.A. Shadtin V.P., HydrodynwWcs of the Foil Near t he Media Boundary Division.,L.:"Sudostrojenie", 1980, 304pp.(in Russian). 31 Paiicherikov A.N. Hydrodyiiwiiics of Hydrofoil . Kiev,"Naukova Dunika",1965,552pp.(in Russian). 32.Panchenkov A.N.,Acceleration Potential Theory. Novosybirsk :"Nauka",1975 (In Russian) 33.Nishiyaina T. Lifting Line Theory of the Submerged Hydrofoil of Finite Span, Parlsl,2,3. J. of the Ai-nerican Society of Naval Engineers , v.131139 34.lsai W.H. Zur Theorie der iiahe dei- Wasserobei Flacke fahreiideii Tragflachei-. Iiig.Ai-ch.27, (1959/60),s295. 35.Basiii M.A. Abou( the Forces acting oil the Hydrofoil Moving neai- the Free Surface of Heavy Liquid Paper,pi-eseiited to the Coiifei-ciicc: "Hydrodyiiaiiiics ot@ the Foil,inoviiig, iicai the Frec 36.Tkach A.Ja. About the Influence of Media Weight oii the Hydrodyiiai@c Characteristics of Lifting Surface. Paper, presented on the Conference: "Hydrodyn@cs of Hydrofoil , Moving near the Free Surface and Gliding Surfaces".1983 Leningrad (in Russian). 37.Makaseev M.A. The Decision of Plane Problem of the Flow around the Plane Problem of the Flow around the Thin Flexible Profile under the Surface of Heavy Liquid Paper,Presented to the Conference "Hydrodyn@cs of the Hydrofoil,Moving near the free Surface of Liquid and Gliding Surfaces, Leningrad 1983 (in Russian). 38.Lotfullin M.V.Tlie Motion of Profi-.'--s System under the Free Surface of Heavy Liquid. Paper,Presented on the Conference:"Hydrodynml@cs of Hydrofoil,Moving near the Free Surface of Heavy Liquid. Paper , presented to the Conference "Hydrodynaiiijcs of the Hydrofoil , Moving near the Free Surface of Liquid and Gliding Surfaces",L.:1983(iii Russia). 39.Lordkipanidze A.N., Calculation of Hydrodyn@c Characteristics for Thin Hydrofoil of Great Span and Comparision of Calculation Results with Experiment . Paper, Presented to the Conference:" Hydrodynw@cs of Hydrofoil , Moving Near the Free Surface of Liquid and Gliding Surfaces."L.: 1983 (In Russian). 40.Tkach A.Ja. About the Influence of Media Weight on the Hydrodynamic 1--haractetistics of Lifting Surface . "Works of LKI", Problei-ns of Ships Hydrodyiiai@cs.1983 (in Russian) 41.Basin M.A. Lordkipanidze A.N.,Tkach A.Ja.The Influence of Froude Nui-nber on the Hydrodynamic Characteristics of Hydrofoil. Collection of Papers Theses on the XVII Conference for the Experii-nental Hydrodynm@cs of Ship, 1984. 42. Basin M.A.,Lordkipanidze A.N., Tkach A.Ja.,The Phenoi-nena of Vortex-Wave Resonance by the Investigation of Hydrofoil, Moving near the Free Surface of Heavy Liquid . The Works of "NTO SP", N 414, L.:"Sudostrojeiiie" 1985, pp.23-31. 43.Komeychuk A.A. Quadrature Fon-nulae by Singular Integrals Nw- nerical Methods of Decision for Differential and Integral Equations and Quadrature Foi-rnulae.1964, vol.4 N 4, pp.64-74.(in Russian). 44. Mishkevich V.G. About the Building of Quadrature Formulae by Singular Integrals , Meeting in Aerohydrodynai@cs.Questions of Shipbuilding . Seriwn: Ship Desighn,1980,N 23, pp.98-108.(in Russian). 45.Saivesen N. Five Years of Numerical Naval Ship Hydrodyiiai@cs at DTNSRDC,J.S.R., vol 25,ii 4,1981,I)p.219-235. 46. Basin M.A.,Zavadovsky N.Yu. Duble Spiral Vortex Model as a Lii@ting Form of Free Surface by Nonstationary Flow of Ideal Incompressible Liquid.The Papers of Se@nar for Boundary Problems Kazan,"KGU",1985,N 2. 47. Lanchester F.W. Stability of an Aerodroine .Paper,Presented to the Meeting of BinWnghein Society, 19 July,1884. 48. Lanchester F.W. Aerodynainics.London,1907. 49.Lanchester F.W., The Joumal of the Royal Aeronautics Society, N 190,vol.XXX, October 1926 50. Longue Hggins M.S., D.Fox M.J.H. neory of the Ah-nost-Wghest Wave. Ile inner Solution .Joumal of Fluid Mechanics 1977, vol.80, pp721742. 51. Lotfullin M.V., Filippov S.I., The Flow around the Profile in Heavy Liquid near the Media Boundary Division Mechanics of Engineering .Thesis of Papers on the Second Republican Scientific-Technical Conference Bregnev 1987,p.44. 52. Filippov S.I. The Flow around the Profile with Arbitrary Fomi with the Flow of Many-Layer Heavy Liquid. Autoreferat of the p.h. Dissertation, Kazan 1986.16 pp. +++++ Item 2 V. II, p. 719-722 Text in English DATA ANALYSIS ON CURRENT IN OSAKA BAY Taketoshi OKUNO and Shigeru NISHIO Department of Marine System Engineering, University of Osaka Prefecture KEYWORDS: Osaka Bay, Besidual Flow, Diffusion, Piver Water, Pollution ABSTRACT This paper describes the result of analyzing data which has been measured for long years in Osaka Bay and published by Osaka Prefectural Fisheries Experimental Station. Density distribution, representing diffusion of river water in eastern region of the Bay, is obtained using measured water temperature, salinity and pressure with averaging seven years data. There exists typical three patterns: the summer, the winter and also the spring type. The autumn type is the same as that of the spring. Considering that the density distribution is formed by the pure diffusion of river water and also the so-called constant current which is consist of tidal current, density current and wind current, the flow is estimated in eastern region near the rivers. The summer pattern shows that the diffusion spread western direction along Kobe to Akashi, although the river water goes southern direction in winter. CONCLUSIONS Re-analyzing the published data, measured in Osaka Bay by Osaka Prefectural Experimental Station, the density distribution is obtained and examined. It is found that typical three patterns depending the season, summer, winter and also spring. The river water in summer flows western direction, while southern in winter. In summer, the water in eastern region of the Bay is stratified clearly. The surface current goes along Kobe through Akashi. The mixing between upper layer and lower layer would start at offshore of Akashi. In the case of winter, the effect of seasonal wind direction, strong eastern wind, must be strong. The effect of the amount of the river water should be exa@ned in detail in the future. The seasonal variation would make clear the diffusion phenomena. Finally, the authors would like to express their ap- preciation to Mr. T. Hirose, Yannmer Diesel Ltd., who helped us as his final year project and Dr. Jo, Osaka Prefectural Fisheries Experimental Station, for giving us the valuable data. REFERENCES [1] Fujiwara, T. et al.:Tidal-jet and vortex-pair driving of the residual circulation in a tidal estuary, Continental Shelf research, Vol.14, 1993 [2] Fujiwara, T. et al.: Constant Current, Tidal Residual Current and Vortex in Osaka Bay, Jour. of Costal Eng. of Japan, Vol.36, 1989 [3] Murota, A. et al.: Spreading a river plume: Field observations integral. model analyses and nurnerical experiment, Physical Processes in estuaries, pp.110-129, 1988 [4] Annual Report of Osaka Prefectural Fisheries Experimental Station, Vol.7 to 13, 1986 to 1993 [5] Onishi, Y.: A numerical study on the tidal residual flow, Jour. Oceanogr. Soc. Japan, Vol.33- pp.207-218, 1977 +++++ Item 3 V. II, p. 847-851 Text in Japanese ON A FLOW VELOCITY SENSOR USING A POLARIXATION-MAINTAINING OPTICAL FIBER Sojun SATO, Hiroshi IITAKA, Yuichi MIYAJI, Takeshi TAGUCHI, Toshio NEMOTO* Electrotechnical Laboratory, School of Science and Technology, Meiji University KEYWORDS: flow velocity, fiber-optic sensor, polarization- maintaining fiber, Karman vortex ABSTRACT We have been studying flow velocity sensors for ocean current measurement by using an optical fiber as the sensing element. Karman vortex street generates, under certain conditions, behind a bluff body placed in a fluid flow. It is well known that current velocity can be measured by counting this regular vortex shedding frequency which is a function of the velocity. In our experiments, afiber-optic vibration sensor consisting of a polarization-maintaining fiber (PMF) is used for detection of the shedding frequency. PMF is aspecial optical fiber in which two polarization modes, having perpendicular polarization planes each other, can propagate independently. The vibration causes the change of indices of fiber material, so phase modulation of the lights occurs. Finally the vibration can be detected as the alternation of the interferometric pattern at the exit of PMF. Results of experiments using awind tunnel show evidently that the measured values by the fiber sensor agree well with the flow velocity. At present, we carry out experiments using awarer tank. Further, we propose a multi-point sensor for measurement of ocean current profile. Many different length PMF are connected each other so as to rotate polarization planes of each fiber by 45 degrees, and form one long sensing fiber. Output of each sensing section can be obtained individually if a low-coherent light source and an adjusting circuit of optical path length are used. The results of basic experiment are also described. RFERENCES (3) Lyle,J.H. et al.: Vortex Shedding Fluid Flowmeter using Optical Fiber Sensor, Electron. Lett., 17, pp.244-245 (1981) (4) Lilababy,P.A., et a].: Monomode Fiber Flowmeter, Int.Conf. Optical Fiber Sensors, Stuttgart, pp.35-38 (1984) (5) Roshko,A.: On the Development of Turbulent Wakes from Vortex Streets, NACA Report, p. 1191 (1954) ***** END Part V/V ************** END Msg. B.PHY **************