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Please use this identifier to cite or link to this item: http://hdl.handle.net/10087/5708

Title: Measurement of Axial Flow Velocity in Cylinder of Reciprocating Engine by Single Incidence-Beam Reference-Mode LDA
Authors: TAKEDA, Chikashi
OHTA, Yuji
ISHIMA, Tsuneaki
ISHII, Kiyoshi
Keywords: LDA
Reference-Mode LDA
Velocity Measurements
Internal Combustion Engine
Axial Flow
Issue Date: 15-Aug-1997
Publisher: 社団法人日本機械学会
Citation: JSME international journal Ser B Fluids and thermal engineering. 40(3), 494-500 (1997)
Abstract: 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.
URI: http://hdl.handle.net/10087/5708
ISSN: 13408054
Appears in Collections:学術雑誌論文

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