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http://dx.doi.org/10.7467/KSAE.2015.23.1.139

Study on Evaluation Method of Flow Characteristics in Steady Flow Bench(2) - Comparison of ISM and PIV Measurement  

Park, Chanjun (Department of Mechanical & Automotive Engineering, Seoul National University of Science and Technology)
Ohm, Inyong (Department of Mechanical & Automotive Engineering, Seoul National University of Science and Technology)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.23, no.1, 2015 , pp. 139-147 More about this Journal
Abstract
This paper is the second investigation on the evaluation methods of flow characteristics in a steady flow bench. In the previous work, several assumptions used in the steady flow bench were examined and it was concluded that the assumption of the solid rotation might cause serious problems. In this study, intake valve angle is selected as a main parameter for the assessment because the main flow direction to cylinder governed by this angle has the strongest influence on the in-cylinder flow pattern. For this purpose, four heads, which have the different angle, are prepared and the flow characteristics are estimated both by the conventional impulse swirl meter and a particle image velocimetry at 1.75 times bore position apart from the cylinder head, which is widely used plane in the steady flow measurement. The results show that both of the eccentricity and the velocity profile distort the flow characteristics when using the ISM at 1.75 plane, however, the effects of two factors act in the opposite direction. In addition, the profile's influence is much greater than that of the eccentricity.
Keywords
Steady flow bench; Swirl; Impulse swirl meter; PIV; Velocity profile; Intake valve angle; Momentum; Eccentricity;
Citations & Related Records
Times Cited By KSCI : 11  (Citation Analysis)
연도 인용수 순위
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