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Title: Principles and computer simulations of intercooled-turbocharged gas generator/expander engine

Abstract

An internal combustion engine is proposed that is based on a patent of Dr. L. S. Wang. This engine utilizes a two-stage adiabatic compression with intercooling to reduce exhaust energy loss, and a reciprocating piston-gasifier to raise the cycle peak temperature. Combustion occurs within piston-gasifier to generate high temperature and pressure gases with no brake net work output. The discharge gas expands in turbocharging turbine to drive the two compressors. Further expansion is performed in the power turbine to produce the engine power output. To study the feasibility of the proposed engine, piston-gasifier is designed and computer code was developed to simulate the engine operations. Processes in various system components are described by several submodels which are integrated in the computer code to predict the engine performance. The piston-gasifier model treats manifolds and cylinders as open systems and combustion is described as a one-zone heat release process. Processes including heat transfer and friction are described in sufficient detail to determine the mass and energy transfers in each manifold and master cylinder. The power turbine is described by the modified Stodola Ellipse while other machineries are described by scaled performance maps. Intercoolers are modeled by a combination of analytical solutions andmore » empirical correlations. The predicted quasi-steady performance characteristics of piston-gasifier are studied. And a reference operating point is chosen to select turbomachineries and to design intercoolers. The system performance is obtained by matching the operations of all components. Covering a wide range of operations, the results of engine simulations show that excellent part load performance is obtained by the reduction of exhaust energy loss. Still liable to refinements, discussions are made, pointing out future directions of further improvement.« less

Authors:
Publication Date:
Research Org.:
State Univ. of New York, Stony Brook, NY (United States)
OSTI Identifier:
5009507
Resource Type:
Miscellaneous
Resource Relation:
Other Information: Thesis (Ph.D.)
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; GAS TURBINE ENGINES; COMPUTERIZED SIMULATION; COMBUSTION; DESIGN; EXHAUST GASES; FEASIBILITY STUDIES; FRICTION; GAS GENERATORS; GASIFICATION; HEAT TRANSFER; LOSSES; MASS TRANSFER; OPERATION; PERFORMANCE; PISTONS; SUPERCHARGERS; CHEMICAL REACTIONS; COMPRESSORS; ENERGY TRANSFER; ENGINES; FLUIDS; GASEOUS WASTES; GASES; HEAT ENGINES; INTERNAL COMBUSTION ENGINES; OXIDATION; SIMULATION; THERMOCHEMICAL PROCESSES; WASTES; 330103* - Internal Combustion Engines- Turbine

Citation Formats

Jeng, Y L. Principles and computer simulations of intercooled-turbocharged gas generator/expander engine. United States: N. p., 1991. Web.
Jeng, Y L. Principles and computer simulations of intercooled-turbocharged gas generator/expander engine. United States.
Jeng, Y L. 1991. "Principles and computer simulations of intercooled-turbocharged gas generator/expander engine". United States.
@article{osti_5009507,
title = {Principles and computer simulations of intercooled-turbocharged gas generator/expander engine},
author = {Jeng, Y L},
abstractNote = {An internal combustion engine is proposed that is based on a patent of Dr. L. S. Wang. This engine utilizes a two-stage adiabatic compression with intercooling to reduce exhaust energy loss, and a reciprocating piston-gasifier to raise the cycle peak temperature. Combustion occurs within piston-gasifier to generate high temperature and pressure gases with no brake net work output. The discharge gas expands in turbocharging turbine to drive the two compressors. Further expansion is performed in the power turbine to produce the engine power output. To study the feasibility of the proposed engine, piston-gasifier is designed and computer code was developed to simulate the engine operations. Processes in various system components are described by several submodels which are integrated in the computer code to predict the engine performance. The piston-gasifier model treats manifolds and cylinders as open systems and combustion is described as a one-zone heat release process. Processes including heat transfer and friction are described in sufficient detail to determine the mass and energy transfers in each manifold and master cylinder. The power turbine is described by the modified Stodola Ellipse while other machineries are described by scaled performance maps. Intercoolers are modeled by a combination of analytical solutions and empirical correlations. The predicted quasi-steady performance characteristics of piston-gasifier are studied. And a reference operating point is chosen to select turbomachineries and to design intercoolers. The system performance is obtained by matching the operations of all components. Covering a wide range of operations, the results of engine simulations show that excellent part load performance is obtained by the reduction of exhaust energy loss. Still liable to refinements, discussions are made, pointing out future directions of further improvement.},
doi = {},
url = {https://www.osti.gov/biblio/5009507}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1991},
month = {Tue Jan 01 00:00:00 EST 1991}
}

Miscellaneous:
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