Performance evaluation of an underwater body and pumpjet by model testing in cavitation tunnel
0
조회
0
다운로드
6
인용
0
참고문헌
초록
Experimental investigations were carried out on an Axi-symmetric Body Model fitted with Pump-jet Propulsor (PJP) in the Cavitation Tunnel at Naval Science and Technological Laboratory (NSTL). The tests were intended for evaluating the propulsion characteristics of the body and propulsor. The self propulsion point of the model for two configurations was determined after finding the corrections for tunnel blockage effects and differences in model length at zero trim. The results were found to match closely with the towing tank results. The rotor and stator torques also matched closely over full range of experiment. Further experiments were carried out on the body at 4.5º angle of trim to investigate the propulsive performance and assess the operational difficulties in the sea. The results indicated an increase in resistance and decrease in rotor thrust; but the balance of torques between the rotor and stator was undisturbed, causing no concern to vehicle roll.
Abstract
Experimental investigations were carried out on an Axi-symmetric Body Model fitted with Pump-jet Propulsor (PJP) in the Cavitation Tunnel at Naval Science and Technological Laboratory (NSTL). The tests were intended for evaluating the propulsion characteristics of the body and propulsor. The self propulsion point of the model for two configurations was determined after finding the corrections for tunnel blockage effects and differences in model length at zero trim. The results were found to match closely with the towing tank results. The rotor and stator torques also matched closely over full range of experiment. Further experiments were carried out on the body at 4.5º angle of trim to investigate the propulsive performance and assess the operational difficulties in the sea. The results indicated an increase in resistance and decrease in rotor thrust; but the balance of torques between the rotor and stator was undisturbed, causing no concern to vehicle roll.
참고문헌 (21)
- Wislicenus,G.F., "Hydrodynamics and propulsion of submerge bodies", J. Am. Rocket Soc, 30(12), pp.1140~1148 (1960)
- Thurston, S, "Review of marine propellers and ducted propeller propulsive devices", J.Aircraft, 3(3), pp.255~261 (1966)
- Thunston, S, "Efficiency of propulsor on body of revolution including boundary layer fluid", Journal of Aircraft, 3, pp.270~277 (1965)
- A method for design of pumpjets, "Henderson R.E", ORL, 15~, pp.Report No. 63-0209-0-7 (1964)
- Vosper P.L, "Pumpjet propulsion - a British splendid achievement", J. Naval Engineering, 36(2) (1996)
- A Study of torpedo propellers–Part I. Ordnance ResearchLaboratory, Pennsylvania State University, "McCormick, B.W", ~, pp.Report NOrd.16597-5 (1956)
- Markatos,N.C., "The Computation of thick axisymmetric boundary layers and wakes around bodies of revolution", Proceedings of Institution of Mechanical Engineers, 198(4), pp.51~62 (1984)
- A Study of torpedo propellers–Part II. Ordnance Research Laboratory, "McCormick, B.W", ~, pp.Report NOrd.16597-13 (1956)
- Wislicenus,G.F., "Fluid mechanics of turbo-machinery", Dover Publication, 1 (1965)
- Das, H.N, "CFD examination of interaction of flow on high-speed submerged body with pumpjet propulsor", 5th Int. Conference on High Performance Marine Vehicles, pp.8~10 (2006)
- Stefan Ivanell, "Hydrodynamic simulation of a torpedo with pumpjet propulsion system", 석사, pp.2001
- Suryanarayana,Ch., "Innovative CAM techniques for propeller manufacture", 3rd International Conference on Navy and Ship Building Nowadays (NSN2003), St Petursburg, pp.26~28 (2003)
- Keshi, H, "Design philosophy of contrarotating propellers", International Conference on Ship and Ocean Technology,SHOT-2002, IIT (2002)
- Suryanarayana, Ch, "Hydrodynamic design of propulsor,profile and hovering system for an expendable decoy", International Conference in Marine Hydrodynamics 2006 (2006), NSTL
- Suryanarayana, Ch, "Hydrodynamic performance evaluation of an underwater body by model testing in cavitation tunnel", International Conference in Marine Hydrodynamics 2006 (2006), NSTL
- Some aspects of submarine design, part:I –Hydrodynamics, "Joubert P.N.", Department of defense, Australian Government, ~, pp.Report No. DSTO-TR-1622 (2004)
- Keller,A.P., "New scaling laws for hydrodynamic cavitation inception", The 2nd International Symposium on Cavitation (1994)
- Keller,A.P., "Cavitation scale effects- A representative of its visual appearance and empirically found relations", NCT’50 International Conference of Propeller Cavitation (2000)
- Harlock,J.H., "Axial flow turbines - fluid mechanics and thermodynamics" (1966), Butterworth Publishers
- Harlock,J.H., "Axial flow compressors - fluid mechanics and thermodynamics" (1958), Butterworth Publishers
- Ch. Suryanarayana, "Experimental evaluation of pumpjet propulsor for an axi-symmetric body in wind tunnel", International Journal of Naval Architecture and Ocean Engineering, 2(1), pp.24~33 (2010), 대한조선학회