A New Approach to Spatially Resolved Flame Temperature Measurements

1979 ◽  
Vol 33 (2) ◽  
pp. 145-150 ◽  
Author(s):  
Manahen A. Fernandez ◽  
Glenn J. Bastiaans
Keyword(s):  
Flame Temperature ◽  
Central Zone ◽  
Horizontal Resolution ◽  
Injection Technique ◽  
Vertical Temperature ◽  
New Approach ◽  
Spatially Resolved ◽  
Secondary Reaction Zone ◽  
Vertical Temperature Distribution ◽  
Radiation Path

Spatially resolved flame temperatures are spectroscopically measured using the slope method, over small (≃0.7 μl), relatively homogenous volumes of flame gases. The spatial resolution is uniquely obtained by introducing Co as a thermometric species into isolated volumes via the use of a droplet injection technique. By this method the emission of light is restricted to a limited volume, whose position in the flame can be accurately determined and controlled. Vertical resolution is determined by the width of the entrance slit of the monochromator employed (100 μm in this study), and horizontal resolution is limited by the width of the emission cloud formed by the injected droplets (1 to 3 mm). The possibility of self-absorption effects are greatly reduced because of the short radiation path length involved. The performance of the method is illustrated by its application to the spatial temperature mapping of the secondary reaction zone of a cylindrical air-acetylene flame. The effects of N2 as a sheathing gas and flame stoichiometry on the radial and vertical temperature distribution of the flame are also investigated. It is determined that a large, virtually isothermal, central zone exists in the flame.

scholarly journals Cooling performance of Ceiling Radiant Textile Air Conditioning System with Ceiling Cassette Unit of Packaged Air Conditioner

2019 ◽  
Vol 111 ◽  
pp. 01082
Author(s):  
Toshio Yamanaka ◽  
Mari Kuranaga ◽  
Tatsunori Maeda ◽  
Haruto Kitakaze
Keyword(s):  
Air Conditioning ◽  
Scale Model ◽  
Airflow Rate ◽  
Air Conditioner ◽  
Tracer Gas ◽  
Vertical Temperature ◽  
Air Conditioning System ◽  
Cooling Performance ◽  
The Third ◽  
Vertical Temperature Distribution

The authors developed a new radiant air conditioning system named ceiling radiant textile air conditioning system with ceiling cassette unit of packaged air conditioner (PAC). The nonflammable textile is stretched under the ceiling with ceiling cassette units of PAC with a distance of around 30 cm. The aim of this study is to investigate the cooling performance of this new radiant system, so the experiments with full scale model were conducted for three system. The first system is “textile only”, the second system is “textile with guide for air return grille” and the third system is “textile with guide and opening for air return grille”. Airflow rate through textile is measured by tracer gas method. In all cases, the vertical temperature distribution is almost uniform, and the cooling effect of “textile with guide and opening for air return grille” is the largest. As for the radiant effect, two systems of “only textile” and “textile with guide for air return grille” are superior to “textile with guide and opening for air return grille”. The airflow rate trough textile is doubled when using guide, and increased by five times if the opening was provided under the guide.

(OR-108)THE SPATIALLY RESOLVED REFRACTOMETER: A NEW APPROACH TO REFRACTIVE MEASUREMENT

2000 ◽  
Vol 77 (SUPPLEMENT) ◽  
pp. 193
Author(s):  
Danielle M. Robertson ◽  
Norman E. Leach ◽  
Anthony Tran ◽  
Brandon W. Dabney ◽  
Srihari Narayanan ◽  
...  
Keyword(s):  
New Approach ◽  
Spatially Resolved

An experimental and non-dimensional study on the vertical temperature distribution of a sealed ship engine room fire

2018 ◽  
Vol 165 ◽  
pp. 22-33 ◽  
Author(s):  
Jinhui Wang ◽  
Yu Jiao ◽  
Long Shi ◽  
Qimiao Xie ◽  
Guoqiang Li ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Vertical Temperature ◽  
Engine Room ◽  
Vertical Temperature Distribution

scholarly journals VI. The vertical temperature distribution the atmosphere over England, and some remarks on the general and local circulation

1912 ◽  
Vol 211 (471-483) ◽  
pp. 253-278 ◽  
Keyword(s):  
Temperature Distribution ◽  
British Isles ◽  
Vertical Temperature ◽  
Local Circulation ◽  
The Past ◽  
Rubber Balloon ◽  
Vertical Temperature Distribution

During the past four years a considerable number of small free balloons carrying selfrecording instruments have been sent up in the British Isles, and sufficient observations have now accumulated to give some idea of the conditions which prevail over England, to a height of about 10 miles, in summer and winter, in cyclonic and anticyclonic weather. The method of obtaining observations is fully described in a publication of the Meteorological Office, M.O. 202. It will suffice here to state that a small selfrecording instrument, weighing 1 oz. (35 gr.), is attached by about 30 ft. (9 metres) of strong thread to a small rubber balloon. The balloon is 1 ft. diameter when unstretched. It is filled with hydrogen until it is expanded to about 1 m. diameter, securely tied up, and then let go. The balloons generally rise until they burst, and carry the instrument on the average to a height of 10 miles (16 km). A label offering a reward of 5 s . is attached to the instrument, and the reward is claimed and the instrument returned in two cases out of three.

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