Overal, performance prediction of turbo rotary compound (turc) engine using simulation results of engine components

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2005

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Karaca, Mehmet

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The thesis proposes an overall performance estimation procedure for a new turbo-rotary compound engine (TURC) and an associated novel thermodynamic cycle. In this engine, two or multiple spools are lined up in series within the engine. In the front spool, positive displacement rotary vane type turbines drive axial compressor the performance of which were estimated using stage stacking calculations. In the back spool, axial turbine stages drive positive displacement rotary vane type compressors, the performance of axial turbine was predicted by series matching of turbine stages. Two air streams feed separately the customary turbo components and the rotary vane components, respectively. Accordingly, the primary high mass flow through the axial compressors and turbines undergoes Bryton cycle, where as the secondary, low mass flow through the positive displacement rotary components is mainly undergoes Akmandor cycle, which is a novel thermodynamic cycle. The energy consumed internally by the engine is minimized because less input shaft power is needed for the rotary vane compressors and higher inlet temperatures and less cooling can be tolerated by the intermittent combustion rotary vane turbines. The result is a radical improvement in both efficiency and net power output. But this result can be estimated, since the novel engine is the combination of a high efficiency internal combustion engine and high performance gas turbine engine. Aerothermodynamics and spool matching calculations comparing a T56-A14 core with a TURC of similar size and compression ratio show that the new engine provides superior performance characteristics by increasing the net output work by 100% and decreasing the specific fuel consumption by 20%.

Subject Keywords

Motor vehicles.

URI

http://etd.lib.metu.edu.tr/upload/2/12606491/index.pdf
https://hdl.handle.net/11511/15418

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

M. Karaca, “Overal, performance prediction of turbo rotary compound (turc) engine using simulation results of engine components,” M.S. - Master of Science, Middle East Technical University, 2005.