Abstract
This paper presents a hardware technology and its accompanying software developed to measure the in-cylinder integral length scales of the flow inside a transparent four-stroke engine directly, using a fiber laser Doppler velocimeter (LDV). A traverse table was designed to combine two 1-component fiber optical probes to form an LDV system with the capability of both 2-component single-point and 1-component two-point simultaneous measurements for velocities. This paper demonstrates the evaluation of radially separated lateral and longitudinal integral length scales. The location was at a mid-plane of the top dead center (TDC) clearance height, and the engine was motored at a speed of 500 rpm. Data analysis was processed using statistical techniques and the physical meaning of the results was explained.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
Author information
Authors and Affiliations
Additional information
Received: 27 August 1996/Accepted: 6 December 1996
Rights and permissions
About this article
Cite this article
Hong, C., Chen, D. Direct measurements of in-cylinder integral length scales of a transparent engine. Experiments in Fluids 23, 113–120 (1997). https://doi.org/10.1007/s003480050092
Issue Date:
DOI: https://doi.org/10.1007/s003480050092