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Relevant bibliographies by topics / Flipper propulsion (Marine engineering)

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Academic literature on the topic 'Flipper propulsion (Marine engineering)'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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Journal articles on the topic "Flipper propulsion (Marine engineering)"

1

Muscutt, Luke E., Gareth Dyke, Gabriel D. Weymouth, Darren Naish, Colin Palmer, and Bharathram Ganapathisubramani. "The four-flipper swimming method of plesiosaurs enabled efficient and effective locomotion." Proceedings of the Royal Society B: Biological Sciences 284, no. 1861 (August 30, 2017): 20170951. http://dx.doi.org/10.1098/rspb.2017.0951.

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The extinct ocean-going plesiosaurs were unique within vertebrates because they used two flipper pairs identical in morphology for propulsion. Although fossils of these Mesozoic marine reptiles have been known for more than two centuries, the function and dynamics of their tandem-flipper propulsion system has always been unclear and controversial. We address this question quantitatively for the first time in this study, reporting a series of precisely controlled water tank experiments that use reconstructed plesiosaur flippers scaled from well-preserved fossils. Our aim was to determine which limb movements would have resulted in the most efficient and effective propulsion. We show that plesiosaur hind flippers generated up to 60% more thrust and 40% higher efficiency when operating in harmony with their forward counterparts, when compared with operating alone, and the spacing and relative motion between the flippers was critical in governing these increases. The results of our analyses show that this phenomenon was probably present across the whole range of plesiosaur flipper motion and resolves the centuries-old debate about the propulsion style of these marine reptiles, as well as indicating why they retained two pairs of flippers for more than 100 million years.

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Jun, Myoung-Jae, and Chang-Soo Han. "Development of a Bioinspired Underwater Robot Using a Single Actuator." Marine Technology Society Journal 51, no. 5 (September 1, 2017): 94–102. http://dx.doi.org/10.4031/mtsj.51.5.11.

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Abstract We propose a novel propulsion mechanism for an underwater robot inspired by the pectoral fins of a fish. This device is referred to as the “flipper.” The flipper is connected to a rotational motor, and its shape is similar to that of the real fish's fins. The flipper using the propulsion mechanism proposed in this study has 1 degree of freedom. We can control the test robot during forward motion as well as its direction-changing operation. The experimental test robot is composed of a flipper at the front of the robot's head, together with a body and a tail/vertical fin. The electronic components are installed into the body. The tail functions to maintain the horizontal/vertical balance of the robot. Forward propulsion is achieved through the rotation of the flipper. The robot's direction can be changed by repeated oscillation of the flipper in a direction opposite to that of the desired angle. Several experiments were performed to measure the thrust force of the experimental robot and its motion characteristics in a test water pool. The experimental results show that the proposed propulsion method is viable.<def-list> Nomenclature <def-item> <term> F T </term> <def> = Thrust </def> </def-item> <def-item> <term> F I </term> <def> = Inertia force </def> </def-item> <def-item> <term> F B </term> <def> = Buoyancy </def> </def-item> <def-item> <term> B V </term> <def> = Platform volume </def> </def-item> <def-item> <term> V target </term> <def> = Target speed </def> </def-item> <def-item> <term> ρ </term> <def> = Water density </def> </def-item> <def-item> <term> P </term> <def> = Flipper pitch </def> </def-item> <def-item> <term> D </term> <def> = Drag force </def> </def-item> <def-item> <term> C D </term> <def> = Drag coefficient </def> </def-item> <def-item> <term> A </term> <def> = Projection of the frontal area </def> </def-item> <def-item> <term> T </term> <def> = Effective power </def> </def-item> <def-item> <term> P m </term> <def> = Propeller power </def> </def-item> <def-item> <term> C M </term> <def> = Center of total body mass </def> </def-item> <def-item> <term> C B </term> <def> = Center of buoyancy </def> </def-item> <def-item> <term> C F </term> <def> = Center of flipper mass </def> </def-item> <def-item> <term> F DS </term> <def> = Restoring force </def> </def-item> <def-item> <term> g </term> <def> = Gravity </def> </def-item> <def-item> <term> Q </term> <def> = Motor torque at maximum revolutions per minute </def> </def-item> <def-item> <term> rps reasonable </term> <def> = Reasonable revolutions per second </def> </def-item> </def-list>

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Fish, Frank E., Paul W. Weber, Mark M. Murray, and Laurens E. Howle. "Marine Applications of the Biomimetic Humpback Whale Flipper." Marine Technology Society Journal 45, no. 4 (July 1, 2011): 198–207. http://dx.doi.org/10.4031/mtsj.45.4.1.

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AbstractThe biomimetic approach seeks technological advancement through a transfer of technology from natural technologies to engineered systems. The morphology of the wing-like flipper of the humpback whale has potential for marine applications. As opposed to the straight leading edge of conventional hydrofoils, the humpback whale flipper has a number of sinusoid-like rounded bumps, called tubercles, which are arranged periodically along the leading edge. The presence of the tubercles modifies the water flow over the wing-like surface, creating regions of vortex generation between the tubercles. These vortices interact with the flow over the tubercle and accelerate that flow, helping to maintain a partially attached boundary layer. This hydrodynamic effect can delay stall to higher angles of attack, increases lift, and reduces drag compared to the post-stall condition of conventional wings. As the humpback whale functions in the marine environment in a Reynolds regime similar to some engineered marine systems, the use of tubercles has the potential to enhance the performance of wing-like structures. Specific applications of the tubercles for marine technology include sailboat masts, fans, propellers, turbines, and control surfaces, such as rudders, dive planes, stabilizers, spoilers, and keels.

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Huang, Wei-Xi, Yihong Chen, Sangbong Lee, Yin Lu Young, and Moustafa Abdel-Maksoud. "Hydrodynamics of marine propulsion." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 18 (September 2019): 6291–92. http://dx.doi.org/10.1177/0954406219875287.

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Appleton, A. D. "Superconducting Marine Propulsion Power." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 206, no. 2 (May 1992): 73–82. http://dx.doi.org/10.1243/pime_proc_1992_206_014_02.

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Over the last 25 years a large amount of research and development has been undertaken on the application of superconductors to marine propulsion systems and a number of superconducting homopolar motors and generators were constructed between the mid 1960s and the early 1980s. The paper reviews this work and shows that the technology had almost reached the point where industrial exploitation could have commenced. The reason why these machines did not reach the market place is discussed together with the impact which the recently discovered higher temperature superconductors may have upon future developments. Reference is made to a new ship which has been constructed in Japan and which derives its thrust directly from electrical energy using superconducting magnets in an engine based upon magnetohydrodynamics (MHD). With the exception of the MHD ship and the programme in the United States all of the work on d.c. machines described in this paper has been carried out by or under the direction of the author.

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Han, Wei-shi, and Tao Liu. "A new marine propulsion system." Journal of Marine Science and Application 2, no. 1 (June 2003): 30–34. http://dx.doi.org/10.1007/bf02935572.

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Tangora, Michael. "The Future of Marine Propulsion: “Reading the Propulsion Crystal Ball”." Marine Technology Society Journal 47, no. 5 (September 1, 2013): 51–55. http://dx.doi.org/10.4031/mtsj.47.5.14.

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AbstractThe marine industry is headed into a period of uncertainty as both environmental restrictions and rising fuel prices simultaneously converge unlike any time in its past. Yet at the same time, innovations in propulsion solutions have allowed the industry to keep pace with demands thus far, as the demand signal continues for both efficient propulsion designs as well as lower overall emissions. The growing calls for environmental compliance, and its origins will be examined, as well as solutions that will reduce propulsion emissions. New regulations and fuels with lower sulfur content will require reconfiguration of the propulsion plants. This paper primarily discusses both the background of the challenges that the industry will be facing as well as available solutions. Both the marine industry as well as the military will be reviewed.

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Mrzljak, Vedran, Igor Poljak, and Jasna Prpić-Oršić. "EXERGY ANALYSIS OF THE MAIN PROPULSION STEAM TURBINE FROM MARINE PROPULSION PLANT." Brodogradnja 70, no. 1 (January 1, 2019): 59–77. http://dx.doi.org/10.21278/brod70105.

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Thaweewat, Nonthipat, Surasak Phoemsapthawee, and Varangrat Juntasaro. "Semi-active flapping foil for marine propulsion." Ocean Engineering 147 (January 2018): 556–64. http://dx.doi.org/10.1016/j.oceaneng.2017.11.008.

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Kinaci, Omer Kemal, Metin Kemal Gokce, Ahmet Dursun Alkan, and Abdi Kukner. "ON SELF-PROPULSION ASSESSMENT OF MARINE VEHICLES." Brodogradnja 69, no. 4 (September 1, 2018): 29–51. http://dx.doi.org/10.21278/brod69403.

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Dissertations / Theses on the topic "Flipper propulsion (Marine engineering)"

1

Jerrelind, Esaias. "Linear Quadratic Control of a Marine Vehicle with Azimuth Propulsion." Thesis, Linköpings universitet, Reglerteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-178007.

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Greytak, Matthew B. (Matthew Bardeen). "High performance path following for marine vehicles using azimuthing podded propulsion." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35673.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.
Includes bibliographical references (p. 101-102).
Podded propulsion systems offer greater maneuvering possibilities for marine vehicles than conventional shaft and rudder systems. As the propulsion unit rotates about its vertical axis to a specified azimuth angle, the entire thrust of the propeller contributes to the steering moment without relying on lift generation by a control surface such as a rudder. However, the larger sideforce and moment cause the ship to enter the nonlinear realm sooner than a ruddered vessel. Furthermore if the rudder or azimuthing propulsor is aft of the vessel's center of gravity then the system is non-minimum phase; during a turn the ship center initially moves in the direction opposite the turn. For these reasons it is necessary to design a robust maneuvering control system to set the azimuth angle of the propulsor in an intelligent and stable manner. This thesis focuses on the path following performance of a vessel with podded propulsion. The enhanced maneuvering abilities of such vessels allow the time constant of cross-track error response to be greatly reduced. Additionally these vessels can follow course changes and waypoints more precisely than ruddered vessels.
(cont.) A simple path following algorithm was developed to achieve this performance; the algorithm uses simulation-based feedforward terms to anticipate the sliding motion of the vessel during a turn. The stability and performance analysis was performed in three domains: linear theory, a nonlinear simulation, and experiments with a 12-foot autonomous surface vessel. Experiments confirmed that path following performance was vastly improved using the feedforward algorithm for waypoints at which the course change angle was large.
by Matthew B. Greytak.
S.M.

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3

Czarnowski, James Taylor. "Exploring the possibility of placing traditional marine vessels under oscillating foil propulsion." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10527.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1997, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
Includes bibliographical references (leaves 123-124).
by James Taylor Czarnowski.
M.S.

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4

Söderberg, Jansson Marcus. "Analysis of the intake grill for marine jet propulsion." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263877.

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Marine waterjet propulsion is a technology that has been developed and refined since the early 1950’ and is proven highly useful for high speed applications with vessels in varying sizes. The intake grill is a component that is mounted in line with the hull to prevent debris from traveling through the waterjet. The intake grill is affected by viscous forces, contact forces and harmonic excitation forces all while affecting the efficiency of the waterjet. In this report a selection of methods is evaluated and verified with the goal of simplifying the design process of the intake grill. A selection of cross-sections is generated and evaluated to draw general conclusions about the efficiency and stability of the intake grill. A selection of computational fluid dynamics and modal analysis methods are utilized. It is concluded that the intake grill is affected by many parameters and can be evaluated by modal FEM analysis and 2D CFD analysis.
Marina vattenjetmotorer har utvecklats och förfinats sedan tidigt 50-tal och har bevisats mycket användbara för applikationer i hög hastighet med båtar i varierande storlekar. Intagsgaller är en komponent som monteras i linje med skrovet på båtar för att förhindra oönskade föremål att färdas genom intaget på vattenjetmotorn. Intagsgallret är påverkat av viskösa krafter, direkta krafter och harmonisk excitation samtidigt som komponenten påverkar vattenjetmotorns effektivitet. I denna rapport så evalueras ett urval av metoder med målet att simplifiera utvecklingsprocessen av intagsgaller. Ett urval av tvärsnittsgeometrier är genererade och evaluerade för att dra generella slutsatser om effektiviteten och stabiliteten av intagsgallret. Ett par olika sorters flödessimuleringar och finita element metoder används. Slutsatsen är att intagsgallret påverkas av ett flertal parametrar och kan utvärderas med modal finita element metoder samt tvådimensionella flödessimuleringar.

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Betancourt, Michelle K. "A comparison of ship maneuvering characteristics for rudders and podded propulsors." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FBetancourt.pdf.

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Man, S. "Aquatic flight inspired propulsion for autonomous underwater vehicles." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/385840/.

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Modern Autonomous Underwater Vehicle (AUV) technology has a number of limitations and one of these is vehicle manoeuvrability. Conventional flight style AUVs generally have turning circle diameters of five or more vehicle lengths, but most marine animals can turn in under one body length. This shows there is merit in looking at marine animals for inspiration to improve the manoeuvrability of AUVs. Aquatic flight propulsion is one marine animal propulsion strategy that was identified early in the research as having the potential to full fill this role. Aquatic flight propulsion has been studied experimentally in the past, but most of the past research focused in one or two axis aquatic flight (foil pitch and dorsoventral roll). However, marine animal literatures show animal aquatic flight is a three axis problem and there is an additional motion component in anteroposterior yaw. The effect of this yaw motion is not well understood and this will be the focus of this thesis’s research. The effect of aquatic flight yaw motion is investigated using a combination of computation modelling and experimental studies. It found two-axis aquatic flight is better for producing propulsive thrust for most scenarios, but three-axis aquatic flight is useful for producing additional off axis force. In particular, the three axis slanted foil actuation path can produce a sizeable vertical force with very little change to the horizontal thrust coefficient, which would be very useful for a positively buoyant AUV to control its depth. The experiment verified the model’s results and many of the experiment data points were within 30% of the model prediction. The experiment has a relatively large uncertainty due to turbulences in the recirculating water channel, so 30% is a reasonably good fit. Whilst there is room for improvement for both the model and the experiment, the current model is sufficient to produce provisional estimates for actuator and control system design as well as identification of various cases of interest for further in depth analysis.

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Griffiths, Denis. "Development and decline of the British crosshead type marine propulsion diesel engine." Thesis, Liverpool John Moores University, 1994. http://researchonline.ljmu.ac.uk/4947/.

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8

Epps, Brenden P. "An impulse framework for hydrodynamic force analysis : fish propulsion, water entry of spheres, and marine propellers." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/61519.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references.
This thesis presents an impulse framework for analyzing the hydrodynamic forces on bodies in flow. This general theoretical framework is widely applicable, and it is used to address the hydrodynamics of fish propulsion, water entry of spheres, and the offdesign performance of marine propellers. These seemingly-unrelated physics problems share a key common thread: The forces on these fish, spheres, and propellers can be modeled as the sum of the reaction to the rate of change of (1) the pressure impulse required to set up the potential flow about the body, and (2) the vortex impulse required to create the vortical structures in the wake of the body. Fish generate propulsive forces by creating and manipulating large-scale vortical structures using their body and tail. High-speed particle image velocimetry experiments show that a fish generates two vortex rings during a C-turn maneuver and that the change in momentum of the fish balances the change in pressure impulse plus the vortex impulse of these rings. When a sphere plunges into a basin of water and creates a sub-surface air cavity in place of a vortical wake, the vortex impulse is zero, and the force on the sphere is given by the pressure impulse component. Using data from high-speed imaging experiments, a semi-empirical numerical simulation is developed herein; this numerical model shows how the presence of the cavity alters the unsteady pressure force on the sphere and modulates the dynamics of the impact event. During steady propeller operation, the pressure impulse is constant, and the loads on the propeller are given by the vortex impulse component. To analyze these loads, a computational design and analysis tool is presented; this code suite is based on propeller lifting line theory, which is shown to be a special case of the general impulse framework of this thesis. A marine propeller is designed, built, and tested over a range of off-design operating conditions. Experimental results match the predicted performance curve for this propeller, which provides important validation data for the numerical method presented herein. 3 Bringing this thesis full circle, the unsteady startup of the propellor is addressed, which is analogous to the impulsive maneuvering of the swimming fish. As in the fish maneuvering problem, the propellor generates a ring-like vortical wake, and it is shown herein how the vortex impulse of these rings provides thrust for the propellor. With the perspective of the impulse framework developed in this thesis, the results of these tandem experimental investigations and numerical simulations provide deeper insight into classical fluid-dynamics theory and modern experimental hydrodynamics.
by Brenden P. Epps.
Ph.D.

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9

Paganucci, Craig J. "The optimization of a dual foil flapping device." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03sep%5FPaganucci.pdf.

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Thesis (M.S. in Aeronautical Engineering)--Naval Postgraduate School, September 2003.
Thesis advisor(s): Kevin D. Jones, Max F. Platzer. Includes bibliographical references (p. 55-56). Also available online.

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Palmer, Alistair Robin. "Analysis of the propulsion and manoeuvring characteristics of survey-style AUVs and the development of a multi-purpose AUV." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/72149/.

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Autonomous Underwater Vehicles (AUVs) are a developing technology with multiple applications including oceanographic research, military missions and commercial activities such as oil and gas field exploration. The reported research covers two main areas, namely, the assessment of the survey performance of AUVs and the development of the next generation of multi-purpose AUVs. The performance characteristics of long range survey-style AUVs are examined and improvements in performance are sought through the use of hybrid devices. Hybrid devices are defined as those that provide both propulsion and manoeuvring forces. Two devices were chosen for detailed investigation; a vectored thruster and a collective and cyclic pitch propeller. The manoeuvring performance of both devices was found to be insufficient to justify the additional engineering complexity associated with them. The aim of the next generation of AUVs is to be able to combine long range survey capabilities with low speed investigation of the environment encountered. An assessment of a likely mission profile and a review of the available design options demonstrate that maintaining the survey efficiency of the AUV is of principal importance. Therefore the investigation focuses on approaches to the addition of low speed control to an existing survey-style AUV design using propeller based thrusters. Externally mounted thrusters and through-body tunnel thrusters are reviewed and new experimental investigations are reported to provide insight into the performance characteristics on a survey-style AUV hull form. The main body of the experimental programme characterises forward and aft mounted tunnel thruster performance over a range of forward speeds and small yaw angles. The results are used to develop a new, simple modelling procedure representing the performance of tunnel thrusters on an AUV which facilitates the incorporation of the characteristics of tunnel thrusters into numerical simulations of AUV performance. Such a simulation is used to examine approaches to undertaking the transition phase between high speed survey and low speed manoeuvring operation. The results demonstrate the advantageous nature of undertaking a smooth interchange between control approaches considering both the vehicle performance and the energy demands.

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Books on the topic "Flipper propulsion (Marine engineering)"

1

From penguin wings to boat flippers. San Diego, Calif: KidHaven Press, 2005.

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Carr, Matthew A. Principles of naval engineering: Propulsion and auxiliary systems. Annapolis, Md: Naval Institute Press, 2012.

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Institute of Marine Engineers. Sydney Branch., ed. Workhorses in Australian waters: A history of marine engineering in Australia. Wahroonga, NSW: Turton & Armstrong, 1987.

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Douwe, Stapersma, ed. Design of propulsion and electric power generation systems. London: IMarEST, Institute of Marine Engineering, Science and Technology, 2002.

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Woud, Hans Klein. Design of propulsion and electric power generation systems. London: IMarEST, Institute of Marine Engineering, Science and Technology, 2002.

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Woud, Hans Klein. Design of propulsion and electric power generation systems. London: IMarEST, Institute of Marine Engineering, Science and Technology, 2002.

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Kostrichenko, V. V. Pistolet u viska imperializma: Malye raketnye korabli proekta 1234. Moskva: Voennai͡a kniga, 2006.

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Johnson, Philip N. Marine propulsion load emulation. 1985.

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Jackson, Douglas H. Detailed Design of Marine Screw Propellers (Propulsion Engineering Series) (Propulsion Engineering). Wexford College Press, 2006.

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Bolvashenkov, Igor. Impact of Operational Conditions of Icebreaker Ships on the Optimal Type of Propulsion System. Nova Science Publishers, Incorporated, 2020.

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Book chapters on the topic "Flipper propulsion (Marine engineering)"

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Hao, Hongyan, and Qingshan Ji. "A Design of Marine Propulsion Shaft Power Telemetry System." In Advances in Mechanical and Electronic Engineering, 185–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31507-7_31.

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Awang, Mohd Naim, Zakiman Zali, Nor Ashimy Mohd Noor, and Ridwan Saputra Nursal. "Main Propulsion Marine Diesel Engine Condition Based Maintenance Monitoring Using Ultrasound Signal." In Lecture Notes in Mechanical Engineering, 175–87. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0002-2_19.

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Mulford, Edgard, Julio Carrasquilla, and Gonzalo Moreno. "Proactive Maintenance in the Azimuth Marine Propulsion: SCHOTTEL Condition Monitoring Solutions." In Proceeding of the VI International Ship Design & Naval Engineering Congress (CIDIN) and XXVI Pan-American Congress of Naval Engineering, Maritime Transportation and Port Engineering (COPINAVAL), 413–23. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-35963-8_35.

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Pérez Osses, Joel R., and Carlos A. Reusser Franck. "Optimization of the Emissions Profile of a Marine Propulsion System Using a Shaft Generator with a MMPT Based Control System and the Use of EEDI and EEOI." In Proceeding of the VI International Ship Design & Naval Engineering Congress (CIDIN) and XXVI Pan-American Congress of Naval Engineering, Maritime Transportation and Port Engineering (COPINAVAL), 258–74. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-35963-8_22.

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"Ship Propulsion." In Reeds Marine Engineering and Technology. Reeds, 2014. http://dx.doi.org/10.5040/9781472987563.ch-010.

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Williams, David M., and Andrew P. White. "Marine Architecture and Engineering - Modern Studies." In A Select Bibliography of British and Irish University Theses about Maritime History, 1792-1990. Liverpool University Press, 1991. http://dx.doi.org/10.5949/liverpool/9780969588504.003.0023.

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A bibliography of post-graduate theses concerning Marine Architecture and Engineering, classified as Modern Studies and subdivided as follows:- Marine Architecture and Ship Design; Ship Propulsion; Ship Behaviour; Ship Operation and Engineering Aspects; and Miscellaneous.

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Lord Weir, P. C., and Harold Edgar Yarrow. "The Generation and Utilization of High-Pressure Superheated Steam for Marine Propulsion." In ENGINEERING CONFERENCE, 1928, 127–30. Thomas Telford Publishing, 2011. http://dx.doi.org/10.1680/ec1928.45187.0025.

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Benvenuto, G., M. Laviola, R. Zaccone, and U. Campora. "Comparison of a natural gas engine with a diesel engine for marine propulsion." In Maritime Technology and Engineering III, 725–34. CRC Press, 2016. http://dx.doi.org/10.1201/b21890-94.

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Conference papers on the topic "Flipper propulsion (Marine engineering)"

1

Gruber, Timothy, Mark M. Murray, and David W. Fredriksson. "Effect of Humpback Whale Inspired Tubercles on Marine Tidal Turbine Blades." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-65436.

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The addition of protuberances, inspired by the humpback whale flipper, on the leading edge of lift producing foils has been shown to improve hydrodynamic performance under a certain range of flow conditions. Specifically, finite wing models have displayed delayed stall characteristics at higher angles of attack and increased maximum lift coefficients without significant hydrodynamic penalties. The objective of this project was to investigate the impact that leading edge protuberances (i.e. tubercles) have on the effectiveness of marine tidal turbine blades, especially at lower tidal flow speeds. The experimental results obtained utilizing three different blade designs (baseline and two tubercle modified) are compared. All blades were designed with a 3-D computer aided design software package and manufactured utilizing rapid prototype techniques. The tests were conducted in the 120 ft tow tank at the U.S. Naval Academy using an experimental apparatus that measured flow speed and electrical power generated. Results for power coefficients are presented for a range of tip speed ratios. Cut-in velocity was also used to evaluated the blade designs. For all test criteria, the tubercle modified blades outperformed the smooth leading edge baseline design blades at the lower test velocities, and did not show degraded performance at the higher velocities tested.

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Asfar, Khaled, and Eyad Al-Smadi. "Water Piston Engine for Marine Vehicle Propulsion." In ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ajkfluids2019-4824.

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Abstract This paper describes an environment friendly propulsion system with negligible noise. The Propulsion system is based on a novel engine called a water piston engine. All moving parts in the classical internal combustion engine are eliminated; the piston, connecting rod, and crankshaft. Also, cams and follower valves are replaced by solenoid valves which inject compressed air into the cylinders. A water column in the cylinder is used to replace the metallic piston. The water column itself inside the cylinder acts as a piston. This Water Piston Engine is powered by pressurized air only. So, a pressure vessel is used to store compressed air. The Pressure derived from the compressed air tanks is directly used in providing thrust by pushing the water out of the cylinder through a 90-degree elbow as a water jet. When the water is ejected from the cylinder and the air pressure inside the cylinder decreases to near atmospheric, the water that surrounds the engine fills the cylinder. Four cylinders are used; each two cylinders are fired simultaneously in order to maintain thrust. This system uses an Arduino microcontroller unit to deal with how much time the pressurized air is needed to discharge the cylinder and to switch the airflow between the engine cylinders. Several field tests have been made in a lake. The experimental data were compared to the theoretical based data in addition to simulate this model using Ansys fluent. The advantages of this novel engine over internal combustion engines are clarified. Videos of the experiments are recorded.

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Martin, Paul, and Donald L. Blount. "Engineering Considerations of Gas Turbine/Waterjet Marine Propulsion Systems." In ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/93-gt-153.

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The installation of gas turbines in high-speed marine vessels is relatively new in the merchant marine sector. The main objective of this paper is to present the engineering considerations that were taken into account during the design, testing and classification of the propulsion machinery of DESTRIERO, a high-speed, aluminum hull craft. This Blue Ribbon record-holding vessel will be the basis for, the discussion which will highlight the value of a detailed technical assessment of a vessel’s propulsion system early in the design process. The DESTRIERO is a 67.7 meter aluminum monohull designed to cross the Atlantic ocean without refueling at a speed in excess of 50 knots in a sea state 4. During trial runs the vessel exceeded 65 knots. In August 1992 during its eastbound transit, the vessel earned the current non-stop Atlantic crossing speed record of 53.09 knots. The propulsion system is provided by three General Electric (GE) LM1600 gas turbines, each developing 20,740 IGHP (ISO base rating). The gas turbines drive three KaMeWa waterjets through a Renk Tacke reduction gearbox. Reverse thrust and steering are accomplished through the two outer jets. Each turbine and its auxiliaries are packaged in MTU modules, which are flexibly mounted to the ship’s structure.

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Miki, M., B. Felder, Y. Kimura, K. Tsuzuki, R. Taguchi, Y. Shiliang, Y. Xu, T. Ida, M. Izumi, and J. G. Weisend. "APPLIED HTS BULKS AND WIRES TO ROTATING MACHINES FOR MARINE PROPULSION." In TRANSACTIONS OF THE CRYOGENIC ENGINEERING CONFERENCE—CEC: Advances in Cryogenic Engineering. AIP, 2010. http://dx.doi.org/10.1063/1.3422360.

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Xu, Wei, Lin He, and Zhi-Qiang Lv. "Dynamic Analysis of a Pneumatic Mounting System for Marine Propulsion Engines." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34192.

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To reduce the vibration and noise level in ships, marine propulsion engines are conventionally supported by rubber mounts. But the design of a rubber mounting system for medium- and low-speed propulsion engines could be very complicated due to the large stiffness and rubber creep of rubber mounts. Air spring, which is superior in many respects to rubber mount, can be used as the propulsion engine mounting system. The superiority and potential of pneumatic mounting system is discussed in this paper. The pneumatic system’s loading and stiffness characteristics, which are distinct from rubber system, are analyzed. And an optimized air pressure distribution among air springs is given. The system natural frequencies and force transmissibility are calculated based on a fictitious propulsion engine model. The results show that the pneumatic mounting system can effectively attenuate the dynamic force transmitted to the ship floor, and the system characteristics are not apparently affected by the air pressure distribution.

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Fatsis, A., and A. S. N. Al Balushi. "Gas Turbine Performance Enhancement for Naval Ship Propulsion using Wave Rotors." In International Conference on Marine Engineering and Technology Oman. London: IMarEST, 2019. http://dx.doi.org/10.24868/icmet.oman.2019.001.

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The propulsion demands of high speed naval vessels often rely on gas turbines fitted in small engine rooms, producing significant amounts of power achieving thus high performance requirements. Gas turbines can be used either to provide purely mechanical propulsion, or alternatively to generate electricity, which is subsequently used by electric drives to propel the ship. However, the thermal efficiencies of gas turbines are lower than those of Diesel engines of similar power, in addition to the fact that all gas turbines are less efficient as the ambient temperature rises, particularly for aero-derivative engines. In the context of improving the performance of existing marine gas turbines with minimum modifications to their baseline configuration, this article is proposing engine’s performance enhancement by integrating a pressure wave supercharger (or wave rotor), while keeping the compressor, combustion chamber and turbine entry temperature of the baseline engine unchanged. Thermodynamic cycle analysis for two-shaft gas turbine engines configurations with and without heat exchanger to recuperate the waste heat from the exhaust gases, typical for marine propulsion is performed for the baseline engines, as well as for the topped with four-port wave rotor engines, at design point conditions and their performances are compared accordingly. Important benefits are obtained for four-port wave rotor-topped engines in comparison to the self-standing baseline engines for the whole range of engine’s operation. It is found that the higher the turbine inlet temperature is, the more the benefit gain of the wave rotor topped engine is attained in terms of efficiency and specific power. It is also concluded that the integration of wave rotor particularly favours engines operating at low compressor pressure ratios and high turbine inlet temperatures. The effect of variation of the most important parameters on performance of the topped engine is investigated. It is concluded that wave rotor topping of marine gas turbines can lead to fuel savings and power increase.

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Liviu-Constantin, Stan. "Marine propulsion systems and the influence of the operational fators." In 2nd International Conference on Computer and Automation Engineering (ICCAE 2010). IEEE, 2010. http://dx.doi.org/10.1109/iccae.2010.5451418.

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Xiros, Nikolaos I. "Investigation of a Nonlinear Control Model for Marine Propulsion Power-Plants." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63797.

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A cycle-mean-value, quasi-steady, thermodynamic model of slow-speed, two-stroke marine Diesel engines, used for performance prediction and engine-propeller/turbocharger matching, is converted into a power-plant analytic model. The dynamic part of the cycle-mean model consists of the two first-order differential equations for the cycle-mean crankshaft and turbocharger shaft rotational accelerations. This form implies a state-space formulation of the power-plant modeling approach. However, engine, turbine and compressor torques have to be calculated through the solution of the algebraic part of the model, which consists of a nonlinear, perplexed algebraic system of equations not analytically solvable. This inhibits the formulation of the power-plant state-space description. By approximating the torque maps, generated by the thermodynamic model, with neural nets, explicit functional relationships are obtained. Identification of the power-plant operating regimes through linearization and decomposition is performed. In effect, a supervisory power-plant controller structure, applicable to real-time control and diagnostics, is proposed, incorporating the nonlinear state-space description of the plant.

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Chen Yutao, Zeng Fanming, and Chen Lingen. "Knowledge discovery method based on data mining for marine propulsion system." In 2010 International Conference on Future Information Technology and Management Engineering (FITME). IEEE, 2010. http://dx.doi.org/10.1109/fitme.2010.5654830.

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Poedjono, B. H., S. Pai, S. Maus, and R. Paynter. "Using Hybrid Propulsion Autonomous Marine Vehicles to Better Characterize Geomagnetic Fields Offshore." In SPE Latin America and Caribbean Petroleum Engineering Conference. Society of Petroleum Engineers, 2017. http://dx.doi.org/10.2118/185469-ms.

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