Measurement of Axial Flow Velocity in Cylinder of Reciprocating Engine by Single Incidence-Beam Reference-Mode LDA.

TAKEDA Chikashi, OHTA Yuji, ISHIMA Tsuneaki, ISHII Kiyoshi, OBOKATA Tomio

doi:10.1299/jsmeb.40.494

Measurement of Axial Flow Velocity in Cylinder of Reciprocating Engine by Single Incidence-Beam Reference-Mode LDA.

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書誌事項

タイトル別名

Measurement of Axial Flow Velocity in C

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説明

In order to measure flow velocity in the swirl and radial directions of a cylinder of an engine in practical use by means of a laser Doppler anemometer(LDA)through a small measuring window on the cylinder head, a back scattering fringe mode LDA is used. This LDA, however, can not be used to measure the velocity component in the axial direction of the cylinder. A single incidence-beam reference-mode LDA is developed to measure the velocity component along the optical axis of the LDA and is applied to measure the fluctuating flow velocity in the axial direction of the cylinder. Ensemble-averaged mean velocity and fluctuation intensity of the velocity as measured using the LDA show good agreement with those measured using the conventional fringe-mode LDA. Based on these results, it can be concluded that the reference-mode LDA is applicable to measurements of the flow velocity in the axial direction of the cylinder through the amall window on the cylinder head.

収録刊行物

JSME International Journal Series B Fluids and Thermal Engineering

JSME International Journal Series B Fluids and Thermal Engineering 40 (3), 494-500, 1997

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