Unsteady Effects on NOx Measurements in Pulse Detonation Combustion

Abstract Emission measurements from unsteady combustion systems such as Pulse Detonation Combustion (PDC) are challenging due to the inherently large variations in pressure, temperature, composition, and flow velocity of exhaust gas. Comparison experimental data is additionally complicated by differences operating conditions gas sampling setup between different facilities. Qualitative considerations with regard process PDC, based on one-dimensional simulations, indicate a systematic influence extraction resulting concentration measurements. Therefore, frequency, sample time, fill well PDC outlet probe geometry were varied experimentally order assess degree which each these parameters impact measured $${\rm NO}_{\rm x}$$ NO x better inform researchers effects when making It was shown that emissions can vary significantly depending choice therefore care must be exercised reduce technique aiming for comparable results.