Design Report Guided Missile Submarine SSG(X) - AOE - Virginia ...

More documents

Recommendations

Info

SSG(X) Design – VT Team 3 Page 70 Figure 61 - Submerged Bare Hull Resistance versus Speed Figure 62 shows a comparison of the VT and MIT methods for the EHP. There is good agreement between the methods. Figure 63 shows the ship’s EHP curves. Figure 62 - Comparison of VT and MIT Methods Figure 63 – Submerged Effective Horsepower versus Speed
SSG(X) Design – VT Team 3 Page 71 4.5.2 Propeller Optimization Additional calculations provided values for the wake fraction, thrust deduction factor and thrust. Figure 64 shows the calculations for these values. These values were necessary for optimization of the propeller. S Cws := π⋅LOA⋅D w := 1 − .371 − 1.7151⋅ t := 1 − .632 − 1.3766⋅ t := if( t < .17, .17, t) VA := V⋅( 1 − w) RT T := ( 1 − t) ⋅ NP ηH := 1 − t 1 − w Cws = 0.819 D P D P D D LOA Cws⋅ D t = 0.17 ηH = 1.037 LOA Cws⋅ D speed of advance - average wake velocity seen by prop hull efficiency t = 0.112 w = 0.31 EHP THP := ηH wake fraction thrust deduction fraction - prop changes pressure distribution around hull which effectively changes the resistance of towed hull w := if( w > 0.2, 0.2, w) Figure 64 - Calculation of Wake Fraction, Thrust Deduction Factor and Thrust Optimization of the propeller is performed using the Michigan POP (Propeller Optimization Program). The program is based off of the Wageningen B Series propeller curves. The propeller is optimized for AIP endurance and is then evaluated for snorkel and AIP sprint. If the propeller cavitates or is not feasible, it must be re-optimized. Table 45 shows the input values for the propeller analysis. Table 45 - Input Values for Propeller Optimization Description Value Thrust AIP endurance @ 5 knt 18.14 kN Thrust AIP Sprint @ 22 knt 298.6 kN Thrust Snorkel (submerged) @ 12 knt 94.71 kN Propeller Diameter (Dp) (optimized) 4.5 m Wake fraction (based on Prop Dia) 0.20 Depth of shaft centerline (SSGX submerged) 30 m Depth of shaft center line (snorkel) 14 m Number of blades 7 Burrill Percent of Back Cavitation 5% Weight fuel AIP (Hydrogen) 621 lton Weight fuel Diesel 160 lton w = 0.2
Page 1 and 2:
Design Report Guided Missile Submar
Page 3 and 4:
SSG(X) Design - VT Team 3 Page 3 Ta
Page 5 and 6:
SSG(X) Design - VT Team 3 Page 5 1
Page 7 and 8:
SSG(X) Design - VT Team 3 Page 7 1.
Page 9 and 10:
SSG(X) Design - VT Team 3 Page 9 en
Page 11 and 12:
SSG(X) Design - VT Team 3 Page 11 3
Page 13 and 14:
SSG(X) Design - VT Team 3 Page 13 S
Page 15 and 16:
SSG(X) Design - VT Team 3 Page 15 F
Page 17 and 18:
SSG(X) Design - VT Team 3 Page 17 T
Page 19 and 20: SSG(X) Design - VT Team 3 Page 19 T
Page 21 and 22: SSG(X) Design - VT Team 3 Page 21 F
Page 23 and 24: SSG(X) Design - VT Team 3 Page 23 V
Page 31 and 32: SSG(X) Design - VT Team 3 Page 31 3
Page 33 and 34: SSG(X) Design - VT Team 3 Page 33 g
Page 37 and 38: SSG(X) Design - VT Team 3 Page 37 R
Page 39 and 40: SSG(X) Design - VT Team 3 Page 39 R
Page 41 and 42: SSG(X) Design - VT Team 3 Page 41 I
Page 45 and 46: SSG(X) Design - VT Team 3 Page 45 i
Page 47 and 48: SSG(X) Design - VT Team 3 Page 47 A
Page 49 and 50: SSG(X) Design - VT Team 3 Page 49 D
Page 57 and 58: SSG(X) Design - VT Team 3 Page 57 C
Page 61 and 62: SSG(X) Design - VT Team 3 Page 61 W
Page 69: SSG(X) Design - VT Team 3 Page 69 F
Page 77 and 78: SSG(X) Design - VT Team 3 Page 77 g
Page 97 and 98: SSG(X) Design - VT Team 3 Page 97
Page 99 and 100: SSG(X) Design - VT Team 3 Page 99 A
Page 121 and 122:
SSG(X) Design - VT Team 3 Page 121
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
show all

Design Report Guided Missile Submarine SSG(X) - AOE - Virginia ...

Create successful ePaper yourself

Delete template?

Save as template?