ID#: 105
Abstract Title: Thermodynamics of Propane-Air Composition Detonation in the Mixture with Hot Detonation Products
Session Title: Poster Session I
Session Date: 7/31/01
Session Start Time: 2:50 PM
Contributing Author: Tarzhanov, V.
Organization: RFNC-VNIITF
Country: Russia
Authors: V.I.Tarzhanov, V.V.Vlasov, V.A.Ogarkov
Short Abstract: Thermodynamic calculation program for parameters of detonation in gas mixtures is developed and implemented in the ´Borland С++ª package. Algorithm is based on the system of equations, which couples the state of gases prior to and after the detonation wave. Prior to the detonation wave these gases include mixture of the gaseous fuel, an oxidizer (oxygen or air) and explosion (combustion) products. After the wave passage they include all substances found in noticeable amounts in the temperature range of 220-5500 оК. Detonation parameters for stoichiometric propane-air compositions in the mixture with hot detonation products (HDP) are calculated. These mixtures are experimentally studied at TSD-01М facility. Nontrivial result is that detonation limits of examined mixtures with hot detonation products were discovered to expand with the increased content of the latter. Abnormally great increase in the upper limit of detonation is obtained with more than 80% content of hot detonation products. Of interest is the significant pressure drop in the Jouget point as well as the drop in caloricity of mixtures with increasing concentration of hot detonation products. Temperature of mixtures remains high and is the dominant factor of their detonability at high concentration of hot products. The results are rather important as the forecast for experimental setup and have heuristic value in the general challenge of spontaneous detonation occurrence in fuel-air clouds