Accession Number:

ADA422570

Title:

Shock Tube Measurements Of Iso-Octane Ignition Times And OH Concentration Time Histories

Descriptive Note:

Corporate Author:

STANFORD UNIV CA DEPT OF MECHANICAL ENGINEERING

Report Date:

2002-01-01

Pagination or Media Count:

8.0

Abstract:

Ignition times and OH radical concentration time histories were measured behind reflected shock waves in iso-octaneO2Ar mixtures. Initial reflected shock conditions were in the ranges 1177 to 2009 K and 1.18 to 8.17 atm, with fuel concentrations of 100 ppm to 1 and equivalence ratios from 0.25 to 2. Ignition times were measured using endwall emission of CH and sidewall pressure. OH concentrations were measured using narrow-linewidth ring-dye laser absorption of the R15 line of the OH A-X 0,0 band at 306.5 nm. The ignition time data and OH concentration time history measurements were compared to model predictions of four current iso-octane oxidation mechanisms, and the implications of these comparisons are discussed. To our knowledge, these data provide the first extensive measurements of low fuel-concentration ignition times and OH concentration time histories for iso-octane auto-ignition, and hence provide a critical contribution to the database needed for validation of a detailed mechanism for this primary reference fuel.

Subject Categories:

  • Combustion and Ignition
  • Fuels

Distribution Statement:

APPROVED FOR PUBLIC RELEASE