Apoved A D-A 22 321 O0MB1 No. 0704-0188 lb. RESTRICTIVE MARKINGS Unclassified None 2a. SECURITY CLASSIFICATION AUTHORITY 3. DISTRIBUTION/AVAILABILITY OF REPORT Distribution unlimited; approved for 2b. DECLASSIFICATION /DOWNGRADING SCHEDULE public release 4. PERFORMING ORGANIZATION REPORT NUMBER(S) 5. MONITORING OffogfffN 4'PORT N" WF~)6 6a. NAME OF PERFORMING ORGANIZATION 6b. OFFICE SYMBOL 20. DISTRIBUTION/ AVAILABILITY OF BSTRACT 21. ABSTRACT SECURITY CLASSIFICATION Q UNCLASSIFIED/UNLIMITED SAME AS RPT. iDTIC USERS Unclassified 22a. NAME OF RESPONSIBLE INDIVIDUAL 22b. TELEPHONE (Include Area Code) 22c. OFFICE SYMBOL Julian M. Tishkoff (202) 767-4935 AFOSR/NA DO Form 1473, JUN 86 Previous editions are obsolete. SECURITY CLASSIFICATION OF THIS PAGE ,' .-. , Unclassified 19. ABSTRACT (cont'd) (1.62±.24) over a pressure range of I to 3 atm. Comparisons between the ethene studies and an ethane/propene mixture case has shown the that alkene fuels have similar values of n. The observed differences in the alkane and alkene results are presently being interpreted as a result of fuel molecular structure effects. Related efforts on the interpretation of optical properties of soot aggregates and the isolation of buoyancy effects in jet diffusion flames have also emerged from recent studies.