Analysis of philadelphia aerosol

1992 ◽  
Vol 50 (2) ◽  
pp. 1704-1705
Author(s):  
Scott Wight
Keyword(s):  
Particulate Material ◽  
Micrometer Particle ◽  
Pollutant Deposition ◽  
Temperature Combustion ◽  
Control Devices ◽  
Urban Airshed ◽  
Particulate Control ◽  
Fine Particulate Material ◽  
High Temperature Combustion ◽  
Insight Into

Size distributions and compositions of atmospheric aerosol are important since they affect such processes as pollutant deposition, visibility reduction, human health, smog formation, and chemical reactions in the atmosphere. Natural and anthropogenic high-temperature combustion sources discharge an abundance of fine particulate material, often with the majority of the mass in the sub-micrometer sized particles. The sub-micrometer particle range is of special interest for source identification because the larger particles are efficiently trapped by the particulate control devices, and the sub-micrometer aerosol exhibits longer residence times in the atmosphere. Insight into the contributing sources to an aerosol population can be gained by investigating the morphology and elemental composition of particles as a function of size.The Philadelphia area is a highly industrialized urban airshed with many discrete sources of aerosol. Philadelphia atmospheric particulate material has been previously characterized with a dichotomous sampler, which produced only two size fractions with a size cutoff at 2.5 μm.

Development of stable supports consisting of SiCSi composite for high temperature combustion catalysts

1995 ◽  
Vol 26 (3-4) ◽  
pp. 247-254 ◽  
Author(s):  
Takeshi Okutani ◽  
Yoshinori Nakata ◽  
Masaaki Suzuki ◽  
Hideaki Nagai
Keyword(s):  
High Temperature ◽  
Temperature Combustion ◽  
High Temperature Combustion

Development of Surface Welding Method for Surface Temperature Measurement of an IC Engine's Combustion Chamber

2006 ◽  
Vol 306-308 ◽  
pp. 453-458
Author(s):  
Hyung Man Kim ◽  
Kap Seung Choi ◽  
Chang Ho Kim ◽  
Dong Jae Lee
Keyword(s):  
Temperature Measurement ◽  
Combustion Engine ◽  
Marine Engine ◽  
Combustion Gas ◽  
Welding Method ◽  
Pull Out ◽  
Engine Cylinder ◽  
Temperature Combustion ◽  
Surface Welding ◽  
High Temperature Combustion

In the recent development of internal combustion engine, considerable increase in speed and power has been accomplished. This achievement, however, brought up various problems due to the excessive temperature of engine parts, which becomes a crucial factor in engine durability. In the present paper, temperature measurement of a marine engine was investigated experimentally. The adapter is made to pull out a thermocouple through the safety valve hole of the engine. The thermocouple is welded on the surface of the cylinder cover to measure the average temperatures of the engine cylinder cover. Ceramic adhesive was used for preventing the affect of high temperature combustion gas. The cylinder cover temperatures of the engine were measured by means of surface welding method. As a result, average temperatures of the engine cylinder cover were successfully in the range of 85~335oC. In the present study, the surface welding method was confirmed from the temperature measurement of cylinder cover in an experimental engine, and can be applied to large-sized marine engine without damage.

Combustion joining of refractory materials: Carbon–carbon composites

2008 ◽  
Vol 23 (1) ◽  
pp. 160-169 ◽  
Author(s):  
Jeremiah D.E. White ◽  
Allen H. Simpson ◽  
Alexander S. Shteinberg ◽  
Alexander S. Mukasyan
Keyword(s):  
Applied Pressure ◽  
Electrical Current ◽  
Carbon Composite ◽  
Carbon Composites ◽  
Refractory Materials ◽  
Temperature Combustion ◽  
Reaction Media ◽  
High Temperature Combustion ◽  
Media Layer ◽  
Reactive Media

Refractory materials such as carbon possess properties that make joining them difficult. In this work, bonding of a carbon–carbon composite is achieved by employing self-sustained, oxygen-free, high-temperature combustion reactions. The effects of several parameters, such as the composition of the reaction media, and the values of the applied current and pressure, on the mechanical strength of the joint were investigated. It was found that the C–C composite possesses a high activity with the reactive media layer, the level of electrical current used to initiate the reaction and the applied pressure do not need to be excessive to obtain a strong joint. Some aspects of the joining mechanism are discussed in detail.

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