Turbulence measurements in a ported IC engine
Conference
·
OSTI ID:5976654
Measurements of the ensemble averaged velocity and turbulence intensity in a ported engine without swirl or squish, motored at 1200, 1800 and 2400 rpm, are presented. The LDV data rates were sufficiently high to allow characterization of the mean velocity in each engine cycle. This is very important since it enables one to separate the cyclic fluctuation in the mean velocity from the turbulence. That is the measurements are cycle resolved. At 1200 rpm the turbulence intensity near top dead center (TDC) was found to be nearly homogeneous and isotropic. This has also been observed in similar valved engines suggesting that in the absence of strong bulk motion the TDC turbulence is insensitive to the intake process. As the engine speed was increased to 1800 and 2400 rpm the turbulence intensity was found to scale approximately linearly with rpm. 20 refs., 17 figs.
- Research Organization:
- Princeton Univ., NJ (USA). Dept. of Mechanical and Aerospace Engineering
- DOE Contract Number:
- AC04-81AL16338
- OSTI ID:
- 5976654
- Report Number(s):
- CONF-820706-4; ON: DE86008168
- Country of Publication:
- United States
- Language:
- English
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