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

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概要

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• 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.

• 一般社団法人日本機械学会の論文
• 1997-08-15

著者

• Ishii K

  Utsunomiya Univ. Utsunomiya‐shi Jpn

• TAKEDA Chikashi

  Department of Mechanical System Engineering, Gunma University

• Ohta Yuji

  Dept.of Mechanical System Engineering Gunma University

• TAKEDA Chikashi

  Electric Measurement Co., Ltd.

• ISHIMA Tsuneaki

  Dept.of Mechanical System Engineering, Gunma University

• ISHII Kiyoshi

  Honda R & D Co., Ltd., Wako R & D Center

• OBOKATA Tomio

  Dept.of Mechanical System Engineering, Gunma University

• Takeda Chikashi

  Department Of Mechanical System Engineering Gunma University

• ISHIMA Tsuneaki

  Dept. of Mech. Eng., Gunma Univ.

• OBOKATA Tomio

  Dept. of Mech. Eng., Gunma Univ.

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• Measurement of Axial Flow Velocity in Cylinder of Reciprocating Engine by Single Incidence-Beam Reference-Mode LDA
• Numerical Prediction of Heat Transfer Coefficient by Karman's Analogy and an Application for Air-Cooled Motorcycle Engines

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