Combustion diagnostics by tunable diode laser-based absorption

The principle, means and measurement systems for multi-parameter combustion diagnostics by tunable diode laser-based absorption were extensively overviewed and applied lo the measurements of fuel and oxygen concentration in the unhurried mixture in pulse detonation chamber. Because fuel distribution in detonation chamber governs the performance of pulse detonation engine (PDE), some controlled fueling experiments were designed to test the effect of partial tube fills on PDE performance. It was demonstrated in these PDE experiments that the diagnostics is rapid and useful. The demonstration proves the utility of the technique for monitoring PDE performance and further, for PDE control and optimization.