Transition modes in the combustion of heterogeneous systems with solid-phase products

Titanium-based composite synthesis in the combustion regime

“…Second cause for the deviation connects obviously with the measure of the combustion temperature for the synthesis conditions in air. Titanium oxidation can effect on summary heat release that is confirmed with the data [9], where the presence of titanium dioxide to 8% was detected. With titanium excess η e increase the combustion temperature decreases.…”

“…To calculate theoretically the combustion rate and product temperature in studied systems we use the model suggested in [9] adding it by the stage the reaction initiation in the igniter and properties dependence on the composition. Generalized model for three systems contains the thermal conductivity equations for igniter (stochiometric mixture 5Ti+3Si) and for the mixture where composites form.…”

“…Temperature and concentration fields were found for different time moments that had allow to find the product temperature and combustion rate for different parameters of the model. The data presented in [10] where used for the calculation ( Table 1). Formal-kinetical parameters that used for calculations are presented in Table 2 [10][11][12][13].…”

“…The data presented in [10] where used for the calculation ( Table 1). Formal-kinetical parameters that used for calculations are presented in Table 2 [10][11][12][13]. It was assumed: l=1 cm, L=5 cm, R=2.5 cm, a=10 3…”

Experimental studies of the propagation of combustion in solids

“…Sim plicity of concept and ease of im plem entation were determ ining features in th e derivation of th e model (B oddington et al 1989). The m ath em atical approach has m uch in com mon w ith th a t of earlier au th o rs (Shkadinskii 1971;Shkadinskii et al 1971;S tru n in a et al 1974, 1981Iv lev a et al 1983). We were p articu larly concerned to link the model w ith th e ability to furnish realistic values of th e in p u t p aram eters having regard for the d earth of inform ation on th e kinetic and th erm al properties of pyrotechnic system s. A pseudo one-dim ensional approach has been ad o p ted in which an allowance for heat loss has been m ade by a simple new tonian h eat tran sfer term .…”