作者：
SWALLOM, DWSADOVNIK, IGIBBS, JSGUROL, HNGUYEN, LVVANDENBERGH, HHDaniel W. Swallomis the director of military power systems at Avco Research Laboratory
Inc. a subsidiary of Textron Inc. in Everett Mass. Dr. Swallom received his B.S. M.S. and Ph.D. degrees in mechanical engineering from the University of Iowa Iowa City Iowa in 1969 1970 and 1972 respectively. He has authored numerous papers in the areas of power propulsion and plasma physics and currently is a member of the Aerospace Power Systems Technical Committee of the AIAA. Dr. Swallom has directed various programs for the development of advanced power generation systems lightweight power conditioning systems and advanced propulsion systems for marine applications. His previous experience includes work with Odin International Corporation Maxwell Laboratories Inc. Argonne National Laboratory and the Air Force Aero Propulsion Laboratory. Currently Dr. Swallom is directing the technical efforts to apply magnetohydrodynamic principles to a variety of propulsion and power applications for various marine vehicles and power system requirements respectively. Isaac Sadovnikis a principal research engineer in the Energy Technology Office at Avco Research Laboratory
Inc. a subsidiary of Textron Inc. He received his B.S. in engineering (1974) B.S. in physics (1975) M.S. in aeronautics and astronautics (1976) and Ph.D. in physics of fluids (1981) at the Massachusetts Institute of Technology. Dr. Sadovnik has been involved in research work funded by DARPA concerning the use of magnetohydrodynamics for underwater propulsion. He has built theoretical models that predict the hydrodynamic behavior of seawater flow through magnetohydrodynamic ducts and their interaction with the rest of the vehicle (thrust and drag produced). In addition Dr. Sadovnik has been involved in research investigations geared toward the NASP program concerning the use of magnetohydrodynamic combustion-driven accelerator channels. Prior to joining Avco Dr. Sadovnik was a research assistant at MIT where he conducted experimental and
Magnetohydrodynamic propulsion systems for submarines offer several significant advantages over conventional propeller propulsion systems. These advantages include the potential for greater stealth characteristics, in...
详细信息
Magnetohydrodynamic propulsion systems for submarines offer several significant advantages over conventional propeller propulsion systems. These advantages include the potential for greater stealth characteristics, increased maneuverability, enhanced survivability, elimination of cavitation limits, greater payload capability, and the addition of a significant emergency propulsion system. These advantages can be obtained with a magnetohydrodynamic propulsion system that is neutrally bouyant and can operate with the existing submarine propulsion system power plant. A thorough investigation of magnetohydrodynamic propulsion systems for submarine applications has been completed. During the investigation, a number of geometric configurations were examined. Each of these configurations and mounting concepts was optimized for maximum performance for a generic attack class submarine. The optimization considered each thruster individually by determining the optimum operating characteristics for each one and accepting only those thrusters that result in a neutrally buoyant propulsion system. The results of this detailed optimization study show that the segmented, annular thruster is the concept with the highest performance levels and greatest efficiency and offers the greatest potential for a practical magnetohydrodynamic propulsion system for attack class submarines. The optimization study results were used to develop a specific point design for a segmented, annular magnetohydrodynamic thruster for an attack class submarine. The design point case has shown that this thruster may be able to provide the necessary thrust to propel an attack class submarine at the required velocity with the potential for a substantial acoustic signature reduction within the constraints of the existing submarine power plant and the maintenance of neutral buoyancy. This innovative magnetohydrodynamic propulsion system offers an approach for submarine propulsion that can be an important contributio
作者：
ADAMS, JDBEVERLY, WFJohn D. Adams:is currently Manager of Marine Programs at Maritime Dynamics
Inc. Tacoma Washington. He received his B.S.E. degree in naval architecture and marine engineering from the University of Michigan in 1972. His professional career began at Stevens Institute of Technology working as a research engineer in the Davidson Laboratory where he conducted model test programs of both conventional and advanced ships. Some of his responsibilities included hydrodynamic model testing of the Navy SES-100A and SES-100B testcraft and the early 2000-ton and 3000-ton SES designs. In 1975 he accepted a position as Director of Maritime Dynamics' field activities at the USN Surface Effect Ship Test Facility where he had responsibility for SES-100A trials analysis. While at SESTF he directed several unique programs including the development of an experimental Ride Control System for the XR-1D SES testcraft. At his present position since 1982 Mr. Adams has directed the development of a production SES Ride Control System the SES-200 trial analysis and analytical research and design studies for SES. He is a member of ASNE and SNAME. Walter F. Beverly III:is Test Director of the lead Landing Craft Air Cushion for Bell Aerospace in Panama City
Florida. He has worked with surface effect ships (SES) for over ten years in various roles: SESTF. Past assignments included: Technical Director of the Navy Surface Effect Ship Test Facility (SESTF) Project engineer on the world's fastest warship the SES-100B and Program Manager's representative and T&E manager for the 3KSES Program in San Diego. Prior to his involvement with SES he was a flight test engineer at the Naval Air Test Center Patuxent River Maryland and graduated from the USN Test Pilot School test project engineering curriculum. Mr. Beverly received his BS in aerospace engineering from Virginia Polytechnic Institute in 1970 and his MS in systems management from the University of Southern California in 1977. He is a member of the American Institute of Aeronautics and
Recent Navy surface effect ship (SES) research has been aimed at achieving efficient operation at task force speeds without compromising the SES advantage of operating at higher speeds. Results showed that this object...
Recent Navy surface effect ship (SES) research has been aimed at achieving efficient operation at task force speeds without compromising the SES advantage of operating at higher speeds. Results showed that this objective could be achieved by designing ships with higher length-to-beam ratios than the previous generation of Navy SES. These ships are typically referred to as “High Length-to-Beam SES”. This paper describes an extensive program undertaken by Naval Sea Systems Command (NAVSEA) to validate this research and demonstrate high length-to-beam SES capabilities. Under this program a 110 ft commercial SES was procured and stretched from a length-to-beam of 2.65 to 4.25 by installing a 50 foot hull extension amidships. This ship is the SES-200; it is the only large high length-to-beam SES in the world. A brief history of the SES-200 is provided, and the use of standard marine construction and systems in this ship is described. A synopsis of the SES-200 Technical Evaluation program completed in the Chesapeake Bay and Atlantic Ocean is given, and results of performance, seakeeping and maneuvering tests are presented. The effect of cushion length-to-beam proportions on both cushion wave making resistance and total SES resistance is explained. Performance test data are presented to show that the advantages of high length-to-beam design have been validated. Full power operation in heavy weather at all headings is demonstrated, and heavy weather motion responses are compared to Navy surface ship criteria to show that limits are satisfied for both high and low speed operation. Directional stability and maneuvering test results are cited for both normal operation and impaired situations. Implications of high length-to-beam technology relative to multithousand ton ship design are discussed. The speed and seakeeping capabilities that SES in this size range offer are indicated by scaling SES-200 test data.
The potential use of rudders as anti-roll devices has long been recognized. However, the possible interference of this secondary function of the rudder with its primary role as the steering mechanism has prevented, fo...
The potential use of rudders as anti-roll devices has long been recognized. However, the possible interference of this secondary function of the rudder with its primary role as the steering mechanism has prevented, for many years, the development of practical rudder roll stabilizers. The practical feasibility of rudder roll stabilization has, however, in recent years been demonstrated by two systems designed and developed for operational evaluation aboard two different U.S. C oast G uard Cutters, i.e., Jarvis and Mellon of the 3,000-ton, 378-foot HAMILTON Class. The authors describe the major components of the rudder roll stabilization (RRS) system, along with the design goals and methodology as applied to these first two prototypes. In addition, a brief history of the hardware development is provided in order to show some of the lessons learned. The near flawless performance of the prototypes over the past four years of operational use in the North Pacific is documented. Results from various sea trials and reports of the ship operators are cited and discussed. The paper concludes with a discussion of the costs and benefits of roll stabilization achieved using both a modern anti-roll fin system, as well as two different performance level RRS systems. The benefits of roll stabilization are demonstrated by the relative expansion in the operational envelopes of the USS OLIVER HAZARD PERRY (FFG-7) Class. The varying levels of roll stabilization suggest that the merits of fins and RRS systems are strongly dependent on mission requirements and the environment. The demonstrated performance of the reliable RRS system offers the naval ship acquisition manager a good economical stabilization system.
作者：
SCHLAPPI, HCThe authorhas diversified experience in the marine
naval weapons and aerospace fields mainly in the area of research and development. After serving four years in theU.S. NAVYhe attended Oregon State University where he received BSME and MSME degrees in Mechanical Engineering specializing in fluid and solid mechanics. Following graduation he worked on naval weapon development at the Naval Ordnance Test Station in Pasadena California where he headed the Structural Test Laboratory and at the Naval Nuclear Weapons Evaluation Facility in Albuquerque New Mexico where he headed the underwater weapons department. The last 20 years of Mr. Schlappi's career have been in the area of high technology rotating machinery development which started with development of turbopumps for liquid rocket engines at the Aerojet Liquid Rocket Company in Sacramento California in 1961. With the decline in the aerospace market
he was instrumental in the application of high technology from aerospace to marine propulsion. He was responsible for the conceptual design and directed the development and application of ten different marine jet propulsion systems while at Aerojet. As project engineer and program manager he directed the development and manufacture of the 6000 SHP marinejets which propelled the Navy Surface Effect Testcraft SES-100A to over 80 knots and the two marine jet propulsion systems 20000 SHP foilborne and 900 SHP hullborne which currently propel the highly successful Navy PHM (PEGASUS Class) Hydrofoil. Before joining Ingalls Shipbuilding in 1978
Mr. Schlappi worked as a consultant on marine propulsion and as Manager of Marine Products at Jacuzzi Brothers Inc. at Little Rock Arkansas. The author has presented many technical papers and reports in the past and is a member of ASNE and AIAA.
The propulsion system on most naval combatants is inherently wasteful of fuel since the propellers, shafts, and engines are sized for dash speed, but operate most of the time at low speed cruiser power. Energy consump...
The propulsion system on most naval combatants is inherently wasteful of fuel since the propellers, shafts, and engines are sized for dash speed, but operate most of the time at low speed cruiser power. Energy consumption is particularly high on twin shaft, gas turbine driven ships which use controllable reversible pitch (CRP) propellers for reversing. On a typical destroyer such as DD 963, the drag of the propulsion appendages is very high, 10–15% of the total ship drag. This drag is present even when operating at low cruise speed where a system with much lower drag could provide the required thrust. This study evaluates several alternate propulsion systems which could be used on a DD 963 type ship to reduce annual fuel consumption. An innovative system, which uses a single DD 963 type propeller system for cruise and two marine jet boosters for added thrust during high speed dash, shows promise of reducing annual fuel consumption by 23 percent. This fuel saving is due to reduced propulsion appendage drag and lower specific fuel consumption during cruise. Annual fuel saving can be further increased to 45% by replacing the two LM-2500 turbines which drive the propeller with a single turbine equipped with Rankine Cycle Energy Recovery System (RACER) and changing the CRP propeller to a more efficient fixed pitch (FP) propeller with reverse gear for astern operation. In addition to reduced energy consumption, the propulsion systems using marine jet boosters for dash speed show promise of significant benefits in other areas such as reduced weight and improved survivability and reliability. The marine jets, which use state-of-the-art technology and have demonstrated performance, provide the same top speed as the baseline propeller system. Improved low speed maneuvering and crash stop capability is provided by reversers on the marine jets. Improved propulsion system redundancy is provided by the three shaft system. A single marine jet will provide nineteen knots speed with
暂无评论