Effects of size and dilution on dynamic properties of exothermic centers

✍ Scribed by L.M. Cohen; A.K. Oppenheim

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 303 KB
• Volume: 25
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(75)90086-3

✦ Synopsis

In a further examination of the concept of exothermic centers, we have calculated the effects of size and dilution of exothermic centers upon the dynamic properties of a combusting H2-O 2 mixture. The computations were carried out for a stoichiometric hydrogen-oxygen mixture at an initial state ofpo = 3.24 arm and T O = 1335 °K, with argon as the diluent. The adiabatic process at constant volume was shown to represent the limit of large sizes, while that of constant pressure was the limit for small sizes, the dynamic behavior of the center in an undiluted mixture, whose reacting kernel had a radius of 100 microns, being practically the same as the latter. The effects of dilution were analyzed consequently only for the adiabatic process at constant pressure. Characteristic features of exothermic power pulses as a function of exothermic energy were expressed in terms of algebraic relations with respect to the concentration of reactants over the range of 100 to 10 per cent in their volumetric fraction.