Deflagration-to-detonation transition in a high-velocity flow with separate delivery of fuel and oxidizer

Abstract

setup through different pipes: natural gas was fed from a receiver 200 L in volume with an overpressure of 0.3 atm, and air was delivered by means of an SCLK11TS vor� tex air compressor. The latter provided air flow rates up to 500 L/s. The gas flow rates were adjusted in a way to obtain a stoichiometric mixture. The natural gas con� tained 98.9% of methane (motor gas). The following process parameters were recorded in the experiment: the pressure in the MID (by means of KARATDI60 lowfrequency pressure transducers), the pressure in different measuring sections of the det� onation tube (by means of PCB 113A23 highfre� quency piezoelectric pressure transducers), and the glow of combustion products in different measuring sections of the detonation tube (by means of photo gauges based on FD�256 photodiodes). The signals of the transducers and photodiodes were recorded by a personal computer by means of amplifiers and ana� loguetodigital converters.