MS Thesis R. Hager - Hawaii National Marine Renewable Energy ...

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WAVEFigure 5. 1 Body Faces Wave Maker (0 ○ )WAVEFigure 5. 2 Body Faces Away from Wave Maker (180 ○ )Linear, regular, harmonic waves are produced using a computer-controlled wavemaker. Thewater depth is set to 11 in. (28 cm). Two wave heights are studied: 0.2 in. and 0.8 in.,denoted H 1 and H 2 , respectively. A wave height of 0.2 in. is considered linear provided thewave conditions are as given in Table 5.1. Comparatively, a wave height of 0.8 in. isconsidered nonlinear again provided the wave conditions given in Table 5.1. Periods rangefrom 0.6 sec (1.67 Hz) to 1.0 sec (1 Hz) in 0.05 sec intervals. Wave generation lasts 30 secwith a 180 sec rest period between each trial. Additionally the body must span a significantportion of the wavelength for the wave to detect the body’s geometry, as seen in Table 5.1.84
Note the diffraction parameter and wave slope are comparable to those studied by Koo andKim (2005). Two wave gages are used to monitor the wave height and frequency.Table 5. 1 Wave ConditionsT (sec) f (Hz) L (in.) H 1 /L H 2 /L B/L0.6 1.66 22.0380 0.0091 0.0363 0.27230.65 1.54 25.7230 0.0078 0.0311 0.23330.7 1.43 29.5550 0.0068 0.0271 0.20300.75 1.33 33.4710 0.0060 0.0239 0.17930.8 1.25 37.4190 0.0053 0.0214 0.16030.85 1.17 41.3630 0.0048 0.0193 0.14510.9 1.11 45.2830 0.0044 0.0177 0.13250.95 1.05 49.4670 0.0040 0.0162 0.12131 1 53.0110 0.0038 0.0151 0.11325.2 Experimental Set-upThe wave flume is 32 ft. (9.75m) long and 6 in. (15cm) wide. The first wave gage isapproximately 8’-3” from the wavemaker and 1’-6” from the body. The second wave gage isapproximately 20’-9”from the end of the wave flume and 1’-6” from the body. Two waveabsorbers are placed at the ends of the wave flume to minimize reflection. The set-up isdepicted in Figure 5.3. Positioning of the wave gages and body is dictated by the flume’sconstruction and reflection minimization.Figure 5. 3 Wave Flume Set-up85
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Geometric Effects on Maximum Power
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ABSTRACTNumerical simulations are c
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3.7 Absorbed Wave Power ...........
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LIST OF FIGURESFigurePageFigure 1.1
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NOMENCLATUREA=incident wave amplitu
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1.2 Advantages of Wave EnergyAdvant
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for various projects. Included in t
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pollution would occur from hydrauli
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Figure 1. 7 Average Annual Wave Pow
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Backer (2009) numerically and exper
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CHAPTER 2. WAVE ENERGY CONVERSION D
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2.3 OrientationOrientation is defin
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Figure 2.4 Oscillating Water Column
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2.5 Reference PointMeans of reactio
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Linear GeneratorTurbineRotary Gener
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Table 2. 1 WEC ClassificationsDevic
Page 33 and 34: 33P.T.O.MooringReferencePointOperat
Page 35 and 36: CHAPTER 3. THEORY AND GOVERNING EQU
Page 37 and 38: F(x,z,t) z 0DFDtFt u F 0 0 (4
Page 39 and 40: in ni(13)on S for i=1, 3in( r n)i3
Page 41 and 42: I iAg e ekz i( kx t)(30)cosh( k(z
Page 44 and 45: where ijkis the permutation symbol.
Page 46 and 47: Mw k ieitS( D I) ijkrinjdS(46)3.3.3
Page 48 and 49: Due to Kirchhoff decomposition, rec
Page 50 and 51: TE KE PE 20L Asin(kx) 1 2(61)dV d
Page 52 and 53: P I Iw dS (70)tnSIf the column
Page 54 and 55: 221 2P gA C(77)max g2 3.8 Maximum
Page 56 and 57: 4.2 AQWA Modeling ProcedureThe user
Page 58 and 59: : Local data has changed, and the c
Page 60 and 61: Figure 4. 5 Drawing in Design Modul
Page 62 and 63: 12. Delete all lines inside the cur
Page 64 and 65: 22. Edit the details of the slice u
Page 66 and 67: Figure 4. 15 Details of the Part7.
Page 68 and 69: Figure 4. 17 Details of the Mesh4.2
Page 70 and 71: Figure 4. 21 Detials of the Wave Di
Page 72 and 73: 5. Highlight Diffraction + Froude-K
Page 74 and 75: Table 4.1 Body Dimensions for Numer
Page 76 and 77: concavity from concave down to conc
Page 78 and 79: Figure 4. 29 Maximum Power Absorpti
Page 80 and 81: Table 4. 3 Numerical ResultsBodyNo.
Page 82 and 83: BodyNo.Bodyλ atT=2.1λ atT=1.0λ a
Page 86 and 87: The body connects to the aluminum p
Page 88 and 89: also allowed for flexibility in cre
Page 90 and 91: AB1 23 4 5 6 7CD8 9 10 11EFigure 5.
Page 92 and 93: and minimum voltage range of the DA
Page 94 and 95: Figure 5. 11 Deleting a Step from L
Page 96 and 97: Figure 5. 14 Recording Options, Sig
Page 98 and 99: Figure 5. 17 Right-mouse Click on t
Page 100 and 101: Zero-OffsetThe Zero-Offset step rem
Page 102 and 103: Figure 5. 24 Filter Step Set-up, Co
Page 104 and 105: 5.6 Data ProcessingFigure 5. 26 Wav
Page 106 and 107: 5.8 Experimental DiscussionAs menti
Page 108 and 109: 5.8.3 Suggestions for Future Resear
Page 110 and 111: 110ikxxRekddzkgkn )cosh())(cosh(,
Page 112 and 113: Proof M ij and B ij are Symmetric T
Page 114 and 115: BIBILIOGRAPHYANSYS. (n.d.). ANSYS A
Page 116: Trust, C. (2011). Capital, Operatin
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