NDLI: Preswirl Maneuvering Propulsor

Content Provider	IEEE Xplore Digital Library
Author	Huyer, S.A. Dropkin, A. Beal, D.N. Farnsworth, J.A.N. Amitay, M.
Copyright Year	1976
Abstract	Recent concept studies have demonstrated the potential to utilize a preswirl propulsor configuration with adjustable upstream stator blades to generate propulsor side forces. These studies led to a set of experiments and corresponding computations to validate this concept. Ducted and open preswirl propulsors were configured with an upstream stator row and downstream rotor. During normal operation, the upstream stator blades are all situated at the same pitch angle and preswirl the flow into the propulsor while generating a roll moment to counter the moment produced by the rotor. By varying the pitch angles of the stator blade about the circumference, it is possible to both generate a mean stator side force and subsequently vary the axial velocity and swirl that is ingested into the rotor. The rotor then generates side forces in response to the modified inflow. Wind tunnel experiments were conducted to measure the steady, spatially varying stator wake flows for various stator geometric configurations using stereoscopic particle image velocimetry. Water tunnel experiments were conducted to measure the forces produced. Experimental data were used to validate computations, which utilized fully viscous 3-D [Reynolds averaged Navier-Stokes (RANS)] computations to predict the stator forces, velocity field, and rotor response. Both methods provided insight into the underlying mechanisms of side force generation. Optimized rotor designs were specifically investigated to isolate the blade forces as well as the induced body forces. In this way, RANS provided high fidelity performance predictions of the final propulsor design. Experimental and computational data demonstrated that total side force coefficients on the order of 0.26 could be generated by the open propulsor. This amount of control authority exceeds current control surface capabilities for Navy 21" (0.5334 m) unmanned undersea vehicles and is comparable to novel thrust-vectored designs.
Sponsorship	IEEE Oceanic Engineering Society
Starting Page	122
Ending Page	138
Page Count	17
File Size	4363822
File Format	PDF
ISSN	03649059
Volume Number	37
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stators Rotors Blades Force Vehicles Computational fluid dynamics Radio access networks vehicle control hydrodynamics marine propellers underwater propulsion unmanned underwater vehicles
Content Type	Text
Resource Type	Article
Subject	Ocean Engineering Mechanical Engineering Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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