The Ignition of Hydrogen-Oxygen Mixture by Shock Wave. II. Measurement of the Pressure and the Volocity of Shock or Detonation Wave

Abstract We have carried on a series of experiments on the shock ignition of a gaseous mixture 2H2+O2 by using a shock tube equipped with pick-ups, which can be used for measuring the pressure and the velocity of shock or detonation waves. The results are summarized as follows: 1) When the pressure P0 of a gaseous mixture is higher than 200 mmHg, the ignition starts between the membrane and the first pick-up along the test chamber and the detonation becomes stable before the detonation wave arrives at the first pick-up. 2) In case P0 is lOO mmHg, the detonation is initiated by an incident shock wave in some cases and by a reflected one in other cases. 3) When P0 is higher than 200 mmHg, the pressure of the detonation wave initiated by shock ignition increases along with the increase of P0 but its velocity decreases with a similar increase.