Optical diagnostics for diesel engine applications: Third quarterly technical progress report, 1 November 1983 to 31 January 1984

Technical Report · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6811492

Sangiovanni, J J; Dobbs, G M

The realization that soot particulate emissions from diesel engines are a potential hazard to human health has led to government legislation that regulates the allowable particulate emissions from diesel-powered automobiles. An acceptable approach would be to develop a better understanding of the physical and chemical processes that govern soot formation in a diesel combustion environment. This understanding could then be exploited by engine designers to select operating parameters which would provide in-cylinder control of particulate emissions. A prerequisite to diesel combustion research, for the purpose of developing soot emission control strategies, is the capability of making in-situ diagnostic measurements that characterize the soot formation and oxidation processes. Measurements of the thermochemical state of the combustion mixture are required, including temperature and species concentrations. These observations are then to be related to independent measurements of soot particulate evolution and growth. To date, several different diagnostic techniques have been successfully implemented in flame and spark ignition engine environments, such as Coherent Anti-Stokes Raman Spectroscopy (CARS) and simple absorption/Mie scattering, to measure such parameters. However, several practical problems may prevent implementation of these diagnostic techniques in the high-pressure, soot-laden environment typical of diesel combustion chambers. The objective of this program is to explore some of these problems and the limits of applicability of CARS and extinction/scattering diagnostics to diesel combustion research.

• Research Organization: United Technologies Research Center, East Hartford, CT (USA)
• DOE Contract Number: AC04-83AL23523
• OSTI ID: 6811492
• Report Number(s): DOE/AL/23523-T4; ON: DE87008958
• Country of Publication: United States
• Language: English

Related Subjects

29 ENERGY PLANNING, POLICY, AND ECONOMY
290300 -- Energy Planning & Policy-- Environment
Health
& Safety
33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
500600 -- Environment
Atmospheric-- Regulations-- (-1989)
54 ENVIRONMENTAL SCIENCES
BURNERS
COMBUSTION PRODUCTS
COMBUSTION PROPERTIES
DIAGNOSTIC TECHNIQUES
DIESEL ENGINES
ELECTRON MICROSCOPY
ENGINES
ENVIRONMENTAL EFFECTS
EXHAUST GASES
FLUIDS
GAS BURNERS
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
LASER SPECTROSCOPY
LIGHT SCATTERING
MICROSCOPY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RAMAN SPECTROSCOPY
RESEARCH PROGRAMS
SCATTERING
SOOT
SPECTROSCOPY
TRANSMISSION ELECTRON MICROSCOPY
WASTES