Ignition Delay Times of Kerosene (Jet-A)/Air Mixtures

TL;DR

This study measures ignition delay times of Jet-A/air mixtures behind shock waves at high temperatures and pressures, providing data crucial for understanding combustion in jet engines.

Contribution

It presents experimental ignition delay times for Jet-A/air mixtures at various conditions using optical diagnostics and shock wave theory.

Findings

Ignition delay times vary with mixture composition and temperature.

Data obtained at pressures of 10 and 20 atm.

Ignition delay decreases with increasing temperature.

Abstract

Ignition of Jet-A/air mixtures was studied behind reflected shock waves. Heating of shock tube at temperature of 150 C was used to prepare a homogeneous fuel mixture. Ignition delay times were measured from OH emission at 309 nm and from absorption of He-Ne laser radiation at 3.3922 micrometers. The conditions behind shock waves were calculated by one-dimensional shock wave theory from initial conditions T1, P1, mixture composition and incident shock wave velocity. The ignition delay times were obtained at two fixed pressures 10, 20 atm for lean, stoichiometric and rich mixtures (ER=0.5, 1, 2) at an overall temperature range of 1040-1380 K.