LDA Measurement of Gasoline Droplet Velocities and Sizes at Intake-Valve Annular Passage in Steady Flow State

1991 ◽  
pp. 248-267 ◽  
Author(s):  
H. Kawazoe ◽  
K. Ohsawa ◽  
M. Kataoka
Keyword(s):  
Steady Flow ◽  
Flow State ◽  
Intake Valve ◽  
Lda Measurement

Prediction of the in-piston-bowl swirl ratio of diesel engines

2018 ◽  
Vol 233 (10) ◽  
pp. 2381-2389
Author(s):  
Yanzhe Sun ◽  
Tianyou Wang ◽  
Ming Wen ◽  
Yufeng Li ◽  
Fuquan Tian ◽  
...  
Keyword(s):  
Steady Flow ◽  
Test Data ◽  
Diesel Engines ◽  
Volume Ratio ◽  
Swirl Flow ◽  
Intake Valve ◽  
Swirl Ratio ◽  
Piston Bowl ◽  
Compression Stroke ◽  
Key Steps

Steady flow tests are widely used to evaluate the performance of intake ports in generating swirl flow in diesel engines. Such test data, however, may deviate largely from the real in-piston-bowl swirl ratio due to the complex unsteady air motion in the compression stroke. In this study, a new method is proposed to predict the unsteady in-piston-bowl swirl ratio of diesel engines from steady flow test data by focusing on three key steps, including the swirl field at intake valve close timing, swirl enhancement due to squish flow, and swirl decay during the compression stroke. Experimental results on an optically accessible diesel engine under non-firing conditions show that, at intake valve close, the relationship between the swirl ratio and the vertical location was approximately linear and the mean swirl ratio could be fitted by a Bessel function; the correlation between the swirl decay coefficient and surface-to-volume ratio was built by fitting the experiment data. Furthermore, the in-piston-bowl swirl ratio during the compression stroke could then be derived according to the conservation of angular momentum.

500 An in vitro steady flow model of mitral regurgitation by three-dimensional Doppler

1999 ◽  
Vol 1 ◽  
pp. S86-S86
Author(s):  
R DESIMONE ◽  
G GLOMBITZA ◽  
C VAHL ◽  
H MEINZER ◽  
S HAGL
Keyword(s):  
Mitral Regurgitation ◽  
Steady Flow ◽  
Flow Model ◽  
Three Dimensional

The Analysis of Traffic Flow State on Foggy Expressway Based on Fuzzy Clustering

ICCTP 2009 ◽  
2009 ◽  
Author(s):  
Jianjun Wang ◽  
Chenfeng Xie ◽  
Zhenwen Chang ◽  
Jingjing Zhang
Keyword(s):  
Traffic Flow ◽  
Fuzzy Clustering ◽  
Flow State

A Study on Combustion Characteristics of Spark-Ignited Engine with Different Late Intake Valve Closing for Miller Cycle

2015 ◽  
Vol 20 (3) ◽  
pp. 141-148
Author(s):  
J.H. Chung ◽  
S.J. Kang ◽  
J.S. Kim ◽  
S.C. Jeong ◽  
J.W. Lee
Keyword(s):  
Combustion Characteristics ◽  
Miller Cycle ◽  
Intake Valve
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