Measurements of Temperature and N2 Number Density in the Combustion Cylinder of a Compression Ignition Engine Utilizing Laser-Raman Diagnostics

Abstract

A p ro v d fo r pu bl~ic r e s e; ds t ribtio n u nli it ed . ARNOLD ENGINEERING DEVELOPMENT CUNTER ARNOLD AIR FORCE STATION, TENESSEE AIR FORCE SYSTEMS COMMAND UNITED STATES AIR FORCE NOTICESWhen U. S. Government drawings, specifications, or other data are used for any purpose other than a definitely related Government procurement operation, the Government thereby incurs no responsibility nor any obligation whatsoever, and the fact that the Government may have formulated, furnished, or in any way supplied the said drawins, specifications, or other data, is not to be regarded by implication or otherwise, or in any manner licensing the holder or any other person or corporation, or conveying any rights or permission to manufacture, use, or sell any patented invention that may in any way be related thereto.Qualified users may obtain copies of this report from the Defense Technical Information Center.References to named commercial products in this report are not to be considered in any sense a an indorsement of the product by the United States Air Force or the Government.This report has been reviewed by the Office of Public Affairs (PA) and is releasable to the National Technical Information Service (NTIS). At NTIS, it will be available to the general public, including foreign nations. APPROVAL STATEMENTThis report has been reviewed and approved. Approved for public release; distribution unlimited. Laser-Raman scattering has been used to measure temperature and nitrogen number density in the combustion cylinder of a specialized research CI engine.Measurements were made as a function of crank angle degrees (CAD) for unfueled operation at 500 and 1,000 rpm and for operation at 1,000 rpm using n-heptane as an alternate fuel to diesel fuel no. 2.A pulsed ruby laser system was the excitation source for the Raman scattering, and the CAD resolution of the ABSTRACT (Continued) measurements was 1.5 x 10 -4 to 0.36 degrees.