NUMERICAL INVESTIGATION OF UNSTEADY HEAT
EXCHANGE IN IGNITION FOR REACTIVE CHANNEL
WALLS BY THE FLOW OF A HIGH-TEMPERATURE
VISCOUS GAS

V. M. Ushakova and O. V. Matvienkob

UDC 536.533

A study is made of the process of ignition of reactive 
channel walls by a laminar flow of hot gases, including the stages 
of heating of a substance and of reacting in the surface layer with 
self-acceleration of the chemical reaction. The process is determined 
by the heat exchange between the gas and the wall, the strength of 
the heat source in the chemical-reaction zone, and the sink of heat 
due to conduction in the radial and axial directions. In the stage 
of self-heating, we can have heat sink not only deep into the wall 
and/or through its external boundary but into the gas flow as well. 
The problem has been solved in a conjugate formulation. The influence 
of the temperature, the velocity of the gas at the entrance to the 
channel, and the wall thickness on ignition characteristics has been 
studied.

aTomsk State Pedagogical University, Tomsk, Russia; email: VMU@mail2000.ru; 
bTomsk State University of Architecture and Civil Engineering, Tomsk, Russia. 
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 75, No. 5, pp. 81-85, 
September-October, 2002. Original article submitted September 25, 2001; 
revision submitted April 4, 2002.

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