헬름홀츠 공진기에 의한 유사 흡기시스템의 비정상유동 특성

Unsteady flows in a semi-induction system was investigated to verify their characteristics. Inside of the induction system in a diesel engine, wave is generated and it affects significantly to breathing performance. The system consists of rotary valve, intake pipe and resonator. To make a air pulsation, a rotary valve was contrived and employed in this system. And also, A side-branched Helmholtz resonator is mounted in the intake pipe to enhance a breathing capacity. The phase and amplitude of the pulsating flow in an unsteady flow system were found to be the strong factor that could be significantly affects to charging capacity. Some of the results given from experiment are described.