Optical diagnostics for diesel engine applications: Quarterly technical progress report, 1 January 1985 to 31 March 1985

Technical Report · Tue Jan 01 04:00:00 EST 1985

OSTI ID:6548132

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 difficult to implement. An acceptable alternative 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: 6548132
• Report Number(s): DOE/AL/23523-T6; ON: DE87008960
• 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
BURNERS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION KINETICS
DIESEL ENGINES
DIESEL FUELS
ENGINES
FLAMES
HEAT ENGINES
HYDROCARBONS
INTERNAL COMBUSTION ENGINES
KINETICS
LASER SPECTROSCOPY
LIGHT SCATTERING
ORGANIC COMPOUNDS
OXIDATION
PARTICLES
PARTICULATES
PETROLEUM PRODUCTS
RAMAN SPECTROSCOPY
REACTION KINETICS
SCATTERING
SOOT
SPECTROSCOPY