Regenerated Marine Gas Turbines: Part I — Cycle Selection and Performance Estimation

Bowen, Thomas L.; Ness, Jon C.

doi:10.1115/82-gt-306

Cited by 4 publications

(6 citation statements)

References 1 publication

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“…The design point performance of both the simple-cycle and ICR 50,000 HP marine gas turbines are estimated using a thermodynamic cycle analysis computer model which uses basic thermodynamic relationships to compute the work across each component of the gas turbine. Cycle parameters for the analysis are based on current marine gas turbines [3] and on actual capabilities of in-production 50,000 HP engines [4]. Table 1 shows the input values used for the 50,000 HP simple cycle and ICR marine engines.…”

Section: Performancementioning

confidence: 99%

“…The generated SFC versus HP curve is shown in Figure 2. For the 50,000 HP ICR gas turbine, an intercooler and recuperator are added to the 50,000 HP simple cycle base engine using the effectiveness and pressure losses assumed in reference [3]. Heat exchanger relationships are added to the 50,000 HP simple cycle thermodynamic computer program to compute the performance of the ICR cycle at the design point.…”

Section: Performancementioning

confidence: 99%

“…The work split between the low and high pressure spools of the 50,000 HP ICR is adjusted using the same optimization technique of reference [3] which optimizes for thermal efficiency and specific power. This results in the 50,000 HP ICR marine gas turbine design point performance as shown in Table 4.…”

Section: Performancementioning

confidence: 99%

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Evaluation of a 50,000 HP Marine Gas Turbine for Use in Future U.S. Navy Surface Ships

Franks¹,

White²,

Ness

1990

Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery

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Analytical studies conducted by the U.S. Navy for the future marine gas turbine propulsion engines have concentrated in the mid-20,000 horsepower (HP) range. This power range meets the propulsion requirements of current surface ships, such as auxiliary and amphibious, frigate, destroyer, and light-cruiser ship types. In looking at future ship propulsion requirements, the possibility of developing a 50,000 HP marine gas turbine should be considered. This paper discusses the results of an initial investigation into the feasibility of a 50,000 HP marine gas turbine propulsion engine for surface ships. The current U.S. Navy 25,000 HP marine gas turbine and a theoretical 50,000 HP marine gas turbine propulsion engine performance characteristics are compared to establish performance trends of simple cycle marine engines. In addition, an advanced cycle 50,000 HP gas turbine with intercooling and recuperating is analyzed. This paper provides comparative results of engine performance for various ship operating profiles, engine size and weight and developmental cost.

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Section: Performancementioning

confidence: 99%

Section: Performancementioning

confidence: 99%

See 1 more Smart Citation

Evaluation of a 50,000 HP Marine Gas Turbine for Use in Future U.S. Navy Surface Ships

Franks¹,

White²,

Ness

1990

Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery

View full text Add to dashboard Cite

show abstract

“…Figure 10 compares the performance of intercooled/ recuperated gas turbines and their simple cycle counterparts as a function of pressure ratio. The data of Figure 10 were taken (partially) from Reference (9), and apply to power systems in the 10,000-20,000 hp nominal range. These curves illustrate the substantial efficiency improvement resulting from using an intercooled and recuperated system, compared with a simple gas turbine unit.…”

Section: Gas Turbine System Enhancementsmentioning

confidence: 99%

Gas Turbine Systems for World Navy Ships

Brady¹

1988

Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery

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The application of gas turbines for propulsion of navy ships for all nations continues to increase at an accelerating rate. World navies which use gas turbines include the United States, Great Britain, the Soviet Union and Japan. Therefore, a survey of the principal gas turbine applications in world navies was conducted. This survey revealed that more than 43 world navies now use gas turbines for ship propulsion. It also indicated that more than 2,700 gas turbines have been (or soon will be) installed in world navy ships. This represents a total worldwide navy application exceeding 38 million installed horsepower.

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“…An alternate approach to the far term engine is to pursue modifications to the simple cycle which include both intercooling and recuperation. Engines of this type are described by Bowen [25] as having significant performance advantages over the simple cycle and even greater advantages over a recuperated advanced cycle. Figure 3 shows a diagram of an intercooled regenerative cycle with a dual spool gas generator and free power turbine.…”

Section: Far Term Enginesmentioning

confidence: 99%

Future Propulsion Machinery Technology for Gas Turbine Powered Frigates, Destroyers, and Cruisers

Baskerville¹,

Quandt²,

Donovan³

1984

Naval Engineers Journal

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A turning point occurred in naval engineering in 1972 when the U.S. Navy chose to use marine gas turbines for the propulsion of its new SPRUANCE and PERRY Class ships. This paper reviews the more than twenty years of experience with turbine technology and its design integration into combat ships needed to make that decision. It is concluded that the availability of a good second generation aircraft derivative engine with proven reliability and a strong commercial base, i.e., the LM‐2500, was as important to the decision as was the predicted improved ship effectiveness and cost benefits. This paper discusses improvements that can be made to the twin engine, single gear, single propeller shaft system. Focusing only on this mechanical transmission concept, it addresses the impact of possible improvements to the engine, gear, and shafting. In particular, the paper discusses current LM‐2500 related R&D efforts to: obtain improved part‐power fuel rates, integrate with a reversing reduction gear, and add on a waste heat recovery steam cycle. Looking ahead to the year 2000, this paper suggests that a successor to the ubiquitous LM‐2500 will appear in the 15 MW power range to provide the next step in the evolution of the twin engine package. This new naval engine will most likely be based on an aircraft core that exists at present, such that it will have demonstrated its reliability and commercial potential through many hours of testing prior to its mid‐1990 marine conversion. This new engine is expected to offer improved air flow, an excellent fuel rate (approaching a flat 0.30 LB/HP‐HR), and effective maintenance monitoring, all at some expense in size, weight, and cost. The year 2000 engine will burn a liquid hydrocarbon fuel similar to JP‐5 because of its aircraft origins. Combined with advances in gear and shafting technology, the full twin engine propulsion system of the year 2000 should be markedly lighter, smaller, and more efficient than today's units. Using a computerized ship synthesis model available in NAVSEA for conceptual design studies, some indication was obtained of how future technology advances for the twin engine mechanical drive arrangement would affect a notional 9200 ton destroyer. This study showed that 1990 propulsion technology results in a ship only slightly smaller in displacement, between one and two knots faster, and using about 18% less propulsion fuel to perform its mission. Year 2000 technology yielded a mission equivalent ship 10% lower in displacement, 1.5 knots faster, and using 28% less propulsion fuel than the original notional 9200‐ton destroyer. These numerical projections are felt to be meaningful only for this study and should not be compared quantitatively with the results of other studies because of the presently subjective nature of the ship synthesis model procedures.

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Regenerated Marine Gas Turbines: Part I — Cycle Selection and Performance Estimation

Cited by 4 publications

References 1 publication

Evaluation of a 50,000 HP Marine Gas Turbine for Use in Future U.S. Navy Surface Ships

Evaluation of a 50,000 HP Marine Gas Turbine for Use in Future U.S. Navy Surface Ships

Gas Turbine Systems for World Navy Ships

Future Propulsion Machinery Technology for Gas Turbine Powered Frigates, Destroyers, and Cruisers

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