실린더헤드 형상에 따른 정상유동 특성Steady Flow Characteristics of Four-Valve Cylinder Heads

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The flow characteristics of five different 4-valve cylinder heads were investigated in a steady flow fig using laser-Doppler velocimetry. The tumble flow of each head with pentroof combustion chamber was quantified by nondimensional tumble number using a tumble adapter. The formation of tumbling vortex was examined in an optical single-cylinder engine which has windows for in-cylinder LDV measurements. Tumble vortex ratio was estimated from the tumble flow measurement. The four-valve cylinder heads with pent-roof combustion chamber showed the tumble vortex from the intake process, which was investigated in the steady flow test. The tumble adaptor which converts the tumble into swirl flow was found to be feasible in predicting the tumble flow in the real engine. The tumble strength in the steady flow test coincides with that in the real engine experiment within 15%. It was found that the steady flow test on the four-valve cylinder heads provides the tip for a better design of cylinder head
Publisher
한국자동차공학회
Issue Date
1995
Keywords

정상유동; 레이저 도플러 유속계측정; 4-밸브 실린더헤드; 텀블 어댑터; 텀블수; 광학 단기통 가솔린엔진

Citation

한국자동차공학회지 1995년 추계학술대회논문집, pp.46-53

URI
http://hdl.handle.net/10203/10903
Link
http://www.ksae.org/
Appears in Collection
ME-Journal Papers(저널논문)

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