A Stock Propeller Design for the High Speed Sealift Hybrid Contra-Rotating Shaft-Pod, Model 5653-3A

reportActive / Technical Report | Accession Number: ADA482324 | Open PDF

Abstract:

A stock propulsor has been designed for the High Speed Sealift Hybrid Contra-Rotating Shaft-Pod. The forward propeller of the contra-rotating set is a standard shaft and strut mounted propeller. The aft propeller is driven by a COTS tractor pod. The full power speed of this design is 39 knots. The final design has a 21.5 foot diameter, five-bladed propeller forward and a 17-foot diameter, seven-bladed propeller aft. Both the forward and aft propellers operate at 113 RPM. Calculations predict that the design will achieve the 39 knot target speed without significant thrust breakdown. A final propulsive coefficient of 0.716 is predicted at 39 knots with 191,500 DHP 143 MW. A propulsive coefficient of 0.64 was measured for the same hull form with four shafts and struts at 39 knots and 231,300 DHP 172 MW. Therefore, this design predicts a 17 decrease in the required DHP. These propellers are currently being manufactured at model scale for open water and powering tests.

Author(s):
Geisbert, Jessica J. ; Schroeder, Seth D.
Author Organization(s):
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD SHIP HYDROMECHANICS DEPT
Descriptive Note:
Final rept.
Supplementary Note:
Funding no's. 07-1-2125-146, 08-1-2125-144, 08-1-2125-146. The original document contains color images. All DTIC reproductions will be in black and white. DOI: 10.21236/ADA482324
Pagination:
0052

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NSWCCD-50-TR-2008/003
Monitor Series:
NAVSEA
 Subject Terms
Joint Capability Areas:
JCA_4_Logistics; JCA_5_Command and Control; JCA_5.3_Planning; JCA_1.2.5_Lessons Learned
Modernization Areas:
Quantum Science and Computing
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*PROPELLERS, *SEALIFT OPERATIONS, HYBRID SYSTEMS, SHAFTS(MACHINE ELEMENTS), PROPELLER SHAFTS, COUNTERROTATING PROPELLERS, EXTERNAL STORES, OFF THE SHELF EQUIPMENT, STRUTS
Field(s)/Group(s):
Marine Engineering, Military Operations, Strategy and Tactics
Keyword(s):
HSS(HIGH SPEED SEALIFT)
Report Date:
2008 Mar 01
Creation Date:
2008 Jun 25