Zobrazeno 1 - 10
of 21
pro vyhledávání: '"N. A. Chigier"'
Autor:
V. Strokin, N. A. Chigier
Publikováno v:
Combustion Science and Technology. 9:111-118
An experimental study has been made of a pure gaseous turbulent diffusion flame issuing from a circular orifice into stagnant room temperature air surroundings. Measurements have been made in the flame and corresponding nonburning jet, of temperature
Publikováno v:
Journal of Energy. 2:330-336
At the 15th Aerospace Sciences Meeting the authors described a technique for particle size measurement using laser doppler anemometry. The present paper reports on developments which have taken place since that time. An additional gate photomultiplie
Autor:
G. Apak, N. A. Chigier
Publikováno v:
Combustion Science and Technology. 10:219-231
Multiple turbulent diffusion flames with swirl have been investigated experimentally. The degreeof swirl was varied from 0.2 to 0.57 and the burner separations were changed from 0.25DE to 1.50DE. Temperature and composition surveys were made at vario
Publikováno v:
Journal of Energy. 2:223-231
An investigation has been made of means for the improvement of high-frequenc y temperature measurement in turbulent combustion by using the fine-wire thermocouple. In particular, when the thermocouple is suitably interfaced with a microcomputer, it i
Publikováno v:
Symposium (International) on Combustion. 18:1543-1551
Ionization probes were used to measure mean ionization current and frequency spectra, auto-correlations and cross-correlations in jet flames with variation in the initial Reynolds numbers and equivalence ratios. Special attention was paid to the tran
Publikováno v:
Journal of Aircraft. 10:752-757
The use of CADD has effected many changes in traditional work methods of the various interfacing disciplines at MCAIR. We have streamlined our tasks by utilizing the cost/time saving techniques presently afforded by this system, and plan to continue
Autor:
N. A. Chigier, A. Chervinsky
Publikováno v:
Journal of Applied Mechanics. 34:443-451
Experiments have been carried out in a series of axisymmetric free turbulent jets with degrees of swirl covering the weak, moderate, and strong ranges, including the case of the onset of reversed flow in the central region of the jet. Measurements ar
Publikováno v:
Journal of Physics E: Scientific Instruments. 5:601-603
An inexpensive method has been developed for determining the size, velocity and direction of flight of particles in flames by photographic means. The method consists of superimposing two photographs separated by a variable time interval. A careful ch
Publikováno v:
15th Aerospace Sciences Meeting.
The use of a forward scattering Laser Anemometer system for the measurement of particle diameters larger than the fringe spacing is investigated. A systematic calibration experiment demonstrates a direct relationship between signal amplitude and part
Publikováno v:
16th Aerospace Sciences Meeting.
The effect of preheat on the temperature and species distributions in propane flames stabilized on a NASA contraswirl can has been examined. Flames with compact stable structure, inner-swirler airflow of 0.0091 kg/s, outer-swirler-plus-bypass airflow