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

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5009507

Jeng, Y L

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.

• Research Organization: State Univ. of New York, Stony Brook, NY (United States)
• OSTI ID: 5009507
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
CHEMICAL REACTIONS
COMBUSTION
COMPRESSORS
COMPUTERIZED SIMULATION
DESIGN
ENERGY TRANSFER
ENGINES
EXHAUST GASES
FEASIBILITY STUDIES
FLUIDS
FRICTION
GAS GENERATORS
GAS TURBINE ENGINES
GASEOUS WASTES
GASES
GASIFICATION
HEAT ENGINES
HEAT TRANSFER
INTERNAL COMBUSTION ENGINES
LOSSES
MASS TRANSFER
OPERATION
OXIDATION
PERFORMANCE
PISTONS
SIMULATION
SUPERCHARGERS
THERMOCHEMICAL PROCESSES
WASTES